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2018-12-28scripts/tags.sh: add more declarationsKirill Tkhai1-2/+11
New declarations and identifier (__always_inline). Link: http://lkml.kernel.org/r/154505048571.504.18330420599768007443.stgit@localhost.localdomain Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Constantine Shulyupin <const@MakeLinux.com> Cc: Kirill Tkhai <ktkhai@virtuozzo.com> Cc: Joey Pabalinas <joeypabalinas@gmail.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Arend van Spriel <arend.vanspriel@broadcom.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-12-28scripts: add spdxcheck.py self testThierry Reding1-0/+12
Add a script that will run spdxcheck.py through a couple of self tests to simplify validation in the future. The tests are run for both Python 2 and Python 3 to make sure all changes to the script remain compatible across both versions. The script tests a regular text file (Makefile) for basic sanity checks and then runs it on a binary file (Documentation/logo.gif) to make sure it works in both cases. It also tests opening files passed on the command line as well as piped files read from standard input. Finally a run on the complete tree will be performed to catch any other potential issues. Link: http://lkml.kernel.org/r/20181212131210.28024-2-thierry.reding@gmail.com Signed-off-by: Thierry Reding <treding@nvidia.com> Thomas Gleixner <tglx@linutronix.de> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Joe Perches <joe@perches.com> Cc: Jeremy Cline <jcline@redhat.com> Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-12-28scripts/checkstack.pl: dynamic stack growth for aarch64Qian Cai1-0/+2
This is to track dynamic amount of stack growth for aarch64, so it is possible to print out offensive functions that may consume too much stack. For example, 0xffff2000084d1270 try_to_unmap_one [vmlinux]: Dynamic (0xcf0) 0xffff200008538358 migrate_page_move_mapping [vmlinux]: Dynamic (0xc60) 0xffff2000081276c8 copy_process.isra.2 [vmlinux]: Dynamic (0xb20) 0xffff200008424958 show_free_areas [vmlinux]: Dynamic (0xb40) 0xffff200008545178 __split_huge_pmd_locked [vmlinux]: Dynamic (0xb30) 0xffff200008555120 collapse_shmem [vmlinux]: Dynamic (0xbc0) 0xffff20000862e0d0 do_direct_IO [vmlinux]: Dynamic (0xb70) 0xffff200008cc0aa0 md_do_sync [vmlinux]: Dynamic (0xb90) Link: http://lkml.kernel.org/r/20181208025143.39363-1-cai@lca.pw Signed-off-by: Qian Cai <cai@lca.pw> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-12-28scripts/decode_stacktrace: only strip base path when a prefix of the pathMarc Zyngier1-1/+1
Running something like: decodecode vmlinux . leads to interested results where not only the leading "." gets stripped from the displayed paths, but also anywhere in the string, displaying something like: kvm_vcpu_check_block (arch/arm64/kvm/virt/kvm/kvm_mainc:2141) which doesn't help further processing. Fix it by only stripping the base path if it is a prefix of the path. Link: http://lkml.kernel.org/r/20181210174659.31054-3-marc.zyngier@arm.com Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-12-28scripts/decodecode: set ARCH when running natively on arm/arm64Marc Zyngier1-0/+7
When running decodecode natively on arm64, ARCH is likely not to be set, and we end-up with .4byte instead of .inst when generating the disassembly. Similar effects would occur if running natively on a 32bit ARM platform, although that's even less popular. A simple workaround is to populate ARCH when it is not set and that we're running on an arm/arm64 system. Link: http://lkml.kernel.org/r/20181210174659.31054-2-marc.zyngier@arm.com Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-12-28bloat-o-meter: ignore __addressable_ symbolsRasmus Villemoes1-0/+1
Since __LINE__ is part of the symbol created by __ADDRESSABLE, almost any change causes those symbols to disappear and get reincarnated, e.g. add/remove: 4/4 grow/shrink: 0/3 up/down: 32/-171 (-139) Function old new delta __addressable_tracing_set_default_clock8649 - 8 +8 __addressable_tracer_init_tracefs8631 - 8 +8 __addressable_ftrace_dump8383 - 8 +8 __addressable_clear_boot_tracer8632 - 8 +8 __addressable_tracing_set_default_clock8650 8 - -8 __addressable_tracer_init_tracefs8632 8 - -8 __addressable_ftrace_dump8384 8 - -8 __addressable_clear_boot_tracer8633 8 - -8 trace_default_header 663 642 -21 tracing_mark_raw_write 406 355 -51 tracing_mark_write 624 557 -67 Total: Before=63889, After=63750, chg -0.22% They're small and in .discard, so ignore them, leading to more useful add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-139 (-139) Function old new delta trace_default_header 663 642 -21 tracing_mark_raw_write 406 355 -51 tracing_mark_write 624 557 -67 Total: Before=63721, After=63582, chg -0.22% Link: http://lkml.kernel.org/r/20181102210030.8383-1-linux@rasmusvillemoes.dk Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Maninder Singh <maninder1.s@samsung.com> Cc: Matteo Croce <mcroce@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-12-28kasan: add CONFIG_KASAN_GENERIC and CONFIG_KASAN_SW_TAGSAndrey Konovalov1-22/+31
This commit splits the current CONFIG_KASAN config option into two: 1. CONFIG_KASAN_GENERIC, that enables the generic KASAN mode (the one that exists now); 2. CONFIG_KASAN_SW_TAGS, that enables the software tag-based KASAN mode. The name CONFIG_KASAN_SW_TAGS is chosen as in the future we will have another hardware tag-based KASAN mode, that will rely on hardware memory tagging support in arm64. With CONFIG_KASAN_SW_TAGS enabled, compiler options are changed to instrument kernel files with -fsantize=kernel-hwaddress (except the ones for which KASAN_SANITIZE := n is set). Both CONFIG_KASAN_GENERIC and CONFIG_KASAN_SW_TAGS support both CONFIG_KASAN_INLINE and CONFIG_KASAN_OUTLINE instrumentation modes. This commit also adds empty placeholder (for now) implementation of tag-based KASAN specific hooks inserted by the compiler and adjusts common hooks implementation. While this commit adds the CONFIG_KASAN_SW_TAGS config option, this option is not selectable, as it depends on HAVE_ARCH_KASAN_SW_TAGS, which we will enable once all the infrastracture code has been added. Link: http://lkml.kernel.org/r/b2550106eb8a68b10fefbabce820910b115aa853.1544099024.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <andreyknvl@google.com> Reviewed-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Reviewed-by: Dmitry Vyukov <dvyukov@google.com> Cc: Christoph Lameter <cl@linux.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-12-27Merge tag 'gcc-plugins-v4.21-rc1' of ↵Linus Torvalds3-0/+113
git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull gcc-plugins update from Kees Cook: "Both arm and arm64 are gaining per-task stack canaries (to match x86), but arm is being done with a gcc plugin, hence it going through the gcc-plugins tree. New gcc-plugin: - Enable per-task stack protector for ARM (Ard Biesheuvel)" * tag 'gcc-plugins-v4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: ARM: smp: add support for per-task stack canaries
2018-12-26Merge branch 'core-rcu-for-linus' of ↵Linus Torvalds1-0/+35
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull RCU updates from Ingo Molnar: "The biggest RCU changes in this cycle were: - Convert RCU's BUG_ON() and similar calls to WARN_ON() and similar. - Replace calls of RCU-bh and RCU-sched update-side functions to their vanilla RCU counterparts. This series is a step towards complete removal of the RCU-bh and RCU-sched update-side functions. ( Note that some of these conversions are going upstream via their respective maintainers. ) - Documentation updates, including a number of flavor-consolidation updates from Joel Fernandes. - Miscellaneous fixes. - Automate generation of the initrd filesystem used for rcutorture testing. - Convert spin_is_locked() assertions to instead use lockdep. ( Note that some of these conversions are going upstream via their respective maintainers. ) - SRCU updates, especially including a fix from Dennis Krein for a bag-on-head-class bug. - RCU torture-test updates" * 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (112 commits) rcutorture: Don't do busted forward-progress testing rcutorture: Use 100ms buckets for forward-progress callback histograms rcutorture: Recover from OOM during forward-progress tests rcutorture: Print forward-progress test age upon failure rcutorture: Print time since GP end upon forward-progress failure rcutorture: Print histogram of CB invocation at OOM time rcutorture: Print GP age upon forward-progress failure rcu: Print per-CPU callback counts for forward-progress failures rcu: Account for nocb-CPU callback counts in RCU CPU stall warnings rcutorture: Dump grace-period diagnostics upon forward-progress OOM rcutorture: Prepare for asynchronous access to rcu_fwd_startat torture: Remove unnecessary "ret" variables rcutorture: Affinity forward-progress test to avoid housekeeping CPUs rcutorture: Break up too-long rcu_torture_fwd_prog() function rcutorture: Remove cbflood facility torture: Bring any extra CPUs online during kernel startup rcutorture: Add call_rcu() flooding forward-progress tests rcutorture/formal: Replace synchronize_sched() with synchronize_rcu() tools/kernel.h: Replace synchronize_sched() with synchronize_rcu() net/decnet: Replace rcu_barrier_bh() with rcu_barrier() ...
2018-12-26Merge branch 'parisc-4.21-1' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull parisc updates from Helge Deller: "The major change in this patchset is the new system call table generation support from Firoz Khan" * 'parisc-4.21-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: syscalls: ignore nfsservctl for other architectures parisc: generate uapi header and system call table files parisc: add system call table generation support parisc: remove __NR_Linux from uapi header file. parisc: add __NR_syscalls along with __NR_Linux_syscalls parisc: move __IGNORE* entries to non uapi header parisc: Fix HP SDC hpa address output parisc: Fix serio address output parisc: Split out alternative live patching code
2018-12-25Merge tag 'drm-next-2018-12-14' of git://anongit.freedesktop.org/drm/drmLinus Torvalds1-78/+0
Pull drm updates from Dave Airlie: "Core: - shared fencing staging removal - drop transactional atomic helpers and move helpers to new location - DP/MST atomic cleanup - Leasing cleanups and drop EXPORT_SYMBOL - Convert drivers to atomic helpers and generic fbdev. - removed deprecated obj_ref/unref in favour of get/put - Improve dumb callback documentation - MODESET_LOCK_BEGIN/END helpers panels: - CDTech panels, Banana Pi Panel, DLC1010GIG, - Olimex LCD-O-LinuXino, Samsung S6D16D0, Truly NT35597 WQXGA, - Himax HX8357D, simulated RTSM AEMv8. - GPD Win2 panel - AUO G101EVN010 vgem: - render node support ttm: - move global init out of drivers - fix LRU handling for ghost objects - Support for simultaneous submissions to multiple engines scheduler: - timeout/fault handling changes to help GPU recovery - helpers for hw with preemption support i915: - Scaler/Watermark fixes - DP MST + powerwell fixes - PSR fixes - Break long get/put shmemfs pages - Icelake fixes - Icelake DSI video mode enablement - Engine workaround improvements amdgpu: - freesync support - GPU reset enabled on CI, VI, SOC15 dGPUs - ABM support in DC - KFD support for vega12/polaris12 - SDMA paging queue on vega - More amdkfd code sharing - DCC scanout on GFX9 - DC kerneldoc - Updated SMU firmware for GFX8 chips - XGMI PSP + hive reset support - GPU reset - DC trace support - Powerplay updates for newer Polaris - Cursor plane update fast path - kfd dma-buf support virtio-gpu: - add EDID support vmwgfx: - pageflip with damage support nouveau: - Initial Turing TU104/TU106 modesetting support msm: - a2xx gpu support for apq8060 and imx5 - a2xx gpummu support - mdp4 display support for apq8060 - DPU fixes and cleanups - enhanced profiling support - debug object naming interface - get_iova/page pinning decoupling tegra: - Tegra194 host1x, VIC and display support enabled - Audio over HDMI for Tegra186 and Tegra194 exynos: - DMA/IOMMU refactoring - plane alpha + blend mode support - Color format fixes for mixer driver rcar-du: - R8A7744 and R8A77470 support - R8A77965 LVDS support imx: - fbdev emulation fix - multi-tiled scalling fixes - SPDX identifiers rockchip - dw_hdmi support - dw-mipi-dsi + dual dsi support - mailbox read size fix qxl: - fix cursor pinning vc4: - YUV support (scaling + cursor) v3d: - enable TFU (Texture Formatting Unit) mali-dp: - add support for linear tiled formats sun4i: - Display Engine 3 support - H6 DE3 mixer 0 support - H6 display engine support - dw-hdmi support - H6 HDMI phy support - implicit fence waiting - BGRX8888 support meson: - Overlay plane support - implicit fence waiting - HDMI 1.4 4k modes bridge: - i2c fixes for sii902x" * tag 'drm-next-2018-12-14' of git://anongit.freedesktop.org/drm/drm: (1403 commits) drm/amd/display: Add fast path for cursor plane updates drm/amdgpu: Enable GPU recovery by default for CI drm/amd/display: Fix duplicating scaling/underscan connector state drm/amd/display: Fix unintialized max_bpc state values Revert "drm/amd/display: Set RMX_ASPECT as default" drm/amdgpu: Fix stub function name drm/msm/dpu: Fix clock issue after bind failure drm/msm/dpu: Clean up dpu_media_info.h static inline functions drm/msm/dpu: Further cleanups for static inline functions drm/msm/dpu: Cleanup the debugfs functions drm/msm/dpu: Remove dpu_irq and unused functions drm/msm: Make irq_postinstall optional drm/msm/dpu: Cleanup callers of dpu_hw_blk_init drm/msm/dpu: Remove unused functions drm/msm/dpu: Remove dpu_crtc_is_enabled() drm/msm/dpu: Remove dpu_crtc_get_mixer_height drm/msm/dpu: Remove dpu_dbg drm/msm: dpu: Remove crtc_lock drm/msm: dpu: Remove vblank_requested flag from dpu_crtc drm/msm: dpu: Separate crtc assignment from vblank enable ...
2018-12-21Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds2-5/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Ingo Molnar: "The biggest part is a series of reverts for the macro based GCC inlining workarounds. It caused regressions in distro build and other kernel tooling environments, and the GCC project was very receptive to fixing the underlying inliner weaknesses - so as time ran out we decided to do a reasonably straightforward revert of the patches. The plan is to rely on the 'asm inline' GCC 9 feature, which might be backported to GCC 8 and could thus become reasonably widely available on modern distros. Other than those reverts, there's misc fixes from all around the place. I wish our final x86 pull request for v4.20 was smaller..." * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: Revert "kbuild/Makefile: Prepare for using macros in inline assembly code to work around asm() related GCC inlining bugs" Revert "x86/objtool: Use asm macros to work around GCC inlining bugs" Revert "x86/refcount: Work around GCC inlining bug" Revert "x86/alternatives: Macrofy lock prefixes to work around GCC inlining bugs" Revert "x86/bug: Macrofy the BUG table section handling, to work around GCC inlining bugs" Revert "x86/paravirt: Work around GCC inlining bugs when compiling paravirt ops" Revert "x86/extable: Macrofy inline assembly code to work around GCC inlining bugs" Revert "x86/cpufeature: Macrofy inline assembly code to work around GCC inlining bugs" Revert "x86/jump-labels: Macrofy inline assembly code to work around GCC inlining bugs" x86/mtrr: Don't copy uninitialized gentry fields back to userspace x86/fsgsbase/64: Fix the base write helper functions x86/mm/cpa: Fix cpa_flush_array() TLB invalidation x86/vdso: Pass --eh-frame-hdr to the linker x86/mm: Fix decoy address handling vs 32-bit builds x86/intel_rdt: Ensure a CPU remains online for the region's pseudo-locking sequence x86/dump_pagetables: Fix LDT remap address marker x86/mm: Fix guard hole handling
2018-12-19Revert "kbuild/Makefile: Prepare for using macros in inline assembly code to ↵Ingo Molnar2-5/+1
work around asm() related GCC inlining bugs" This reverts commit 77b0bf55bc675233d22cd5df97605d516d64525e. See this commit for details about the revert: e769742d3584 ("Revert "x86/jump-labels: Macrofy inline assembly code to work around GCC inlining bugs"") Conflicts: arch/x86/Makefile Reported-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Borislav Petkov <bp@alien8.de> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: Juergen Gross <jgross@suse.com> Cc: Richard Biener <rguenther@suse.de> Cc: Kees Cook <keescook@chromium.org> Cc: Segher Boessenkool <segher@kernel.crashing.org> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Nadav Amit <namit@vmware.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-12-14scripts/spdxcheck.py: always open files in binary modeThierry Reding1-2/+4
The spdxcheck script currently falls over when confronted with a binary file (such as Documentation/logo.gif). To avoid that, always open files in binary mode and decode line-by-line, ignoring encoding errors. One tricky case is when piping data into the script and reading it from standard input. By default, standard input will be opened in text mode, so we need to reopen it in binary mode. The breakage only happens with python3 and results in a UnicodeDecodeError (according to Uwe). Link: http://lkml.kernel.org/r/20181212131210.28024-1-thierry.reding@gmail.com Fixes: 6f4d29df66ac ("scripts/spdxcheck.py: make python3 compliant") Signed-off-by: Thierry Reding <treding@nvidia.com> Reviewed-by: Jeremy Cline <jcline@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Joe Perches <joe@perches.com> Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-12-14checkstack.pl: fix for aarch64Qian Cai1-2/+2
There is actually a space after "sp," like this, ffff2000080813c8: a9bb7bfd stp x29, x30, [sp, #-80]! Right now, checkstack.pl isn't able to print anything on aarch64, because it won't be able to match the stating objdump line of a function due to this missing space. Hence, it displays every stack as zero-size. After this patch, checkpatch.pl is able to match the start of a function's objdump, and is then able to calculate each function's stack correctly. Link: http://lkml.kernel.org/r/20181207195843.38528-1-cai@lca.pw Signed-off-by: Qian Cai <cai@lca.pw> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-12-12ARM: smp: add support for per-task stack canariesArd Biesheuvel3-0/+113
On ARM, we currently only change the value of the stack canary when switching tasks if the kernel was built for UP. On SMP kernels, this is impossible since the stack canary value is obtained via a global symbol reference, which means a) all running tasks on all CPUs must use the same value b) we can only modify the value when no kernel stack frames are live on any CPU, which is effectively never. So instead, use a GCC plugin to add a RTL pass that replaces each reference to the address of the __stack_chk_guard symbol with an expression that produces the address of the 'stack_canary' field that is added to struct thread_info. This way, each task will use its own randomized value. Cc: Russell King <linux@armlinux.org.uk> Cc: Kees Cook <keescook@chromium.org> Cc: Emese Revfy <re.emese@gmail.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Laura Abbott <labbott@redhat.com> Cc: kernel-hardening@lists.openwall.com Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Kees Cook <keescook@chromium.org>
2018-12-10parisc: syscalls: ignore nfsservctl for other architecturesFiroz Khan1-0/+1
This adds an exception to the syscall table checking script. nfsservctl entry is only provided on x86, and there is no reason to add it elsewhere. However, including it on the syscall table caused a warning for most configurations on non-x86. <stdin>:696:2: warning: #warning syscall nfsservctl not implemented [-Wcpp] Signed-off-by: Firoz Khan <firoz.khan@linaro.org> Acked-by: Helge Deller <deller@gmx.de> Signed-off-by: Helge Deller <deller@gmx.de>
2018-12-07Merge tag 'gcc-plugins-v4.20-rc6' of ↵Linus Torvalds1-3/+5
git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull gcc stackleak plugin fixes from Kees Cook: - Remove tracing for inserted stack depth marking function (Anders Roxell) - Move gcc-plugin pass location to avoid objtool warnings (Alexander Popov) * tag 'gcc-plugins-v4.20-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: stackleak: Register the 'stackleak_cleanup' pass before the '*free_cfg' pass stackleak: Mark stackleak_track_stack() as notrace
2018-12-06stackleak: Register the 'stackleak_cleanup' pass before the '*free_cfg' passAlexander Popov1-3/+5
Currently the 'stackleak_cleanup' pass deleting a CALL insn is executed after the 'reload' pass. That allows gcc to do some weird optimization in function prologues and epilogues, which are generated later [1]. Let's avoid that by registering the 'stackleak_cleanup' pass before the '*free_cfg' pass. It's the moment when the stack frame size is already final, function prologues and epilogues are generated, and the machine-dependent code transformations are not done. [1] https://www.openwall.com/lists/kernel-hardening/2018/11/23/2 Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Alexander Popov <alex.popov@linux.com> Signed-off-by: Kees Cook <keescook@chromium.org>
2018-12-04Merge branch 'for-mingo' of ↵Ingo Molnar1-0/+35
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu Pull RCU changes from Paul E. McKenney: - Convert RCU's BUG_ON() and similar calls to WARN_ON() and similar. - Replace calls of RCU-bh and RCU-sched update-side functions to their vanilla RCU counterparts. This series is a step towards complete removal of the RCU-bh and RCU-sched update-side functions. ( Note that some of these conversions are going upstream via their respective maintainers. ) - Documentation updates, including a number of flavor-consolidation updates from Joel Fernandes. - Miscellaneous fixes. - Automate generation of the initrd filesystem used for rcutorture testing. - Convert spin_is_locked() assertions to instead use lockdep. ( Note that some of these conversions are going upstream via their respective maintainers. ) - SRCU updates, especially including a fix from Dennis Krein for a bag-on-head-class bug. - RCU torture-test updates. Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-12-01Merge branch 'x86-pti-for-linus' of ↵Linus Torvalds1-2/+0
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull STIBP fallout fixes from Thomas Gleixner: "The performance destruction department finally got it's act together and came up with a cure for the STIPB regression: - Provide a command line option to control the spectre v2 user space mitigations. Default is either seccomp or prctl (if seccomp is disabled in Kconfig). prctl allows mitigation opt-in, seccomp enables the migitation for sandboxed processes. - Rework the code to handle the conditional STIBP/IBPB control and remove the now unused ptrace_may_access_sched() optimization attempt - Disable STIBP automatically when SMT is disabled - Optimize the switch_to() logic to avoid MSR writes and invocations of __switch_to_xtra(). - Make the asynchronous speculation TIF updates synchronous to prevent stale mitigation state. As a general cleanup this also makes retpoline directly depend on compiler support and removes the 'minimal retpoline' option which just pretended to provide some form of security while providing none" * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (31 commits) x86/speculation: Provide IBPB always command line options x86/speculation: Add seccomp Spectre v2 user space protection mode x86/speculation: Enable prctl mode for spectre_v2_user x86/speculation: Add prctl() control for indirect branch speculation x86/speculation: Prepare arch_smt_update() for PRCTL mode x86/speculation: Prevent stale SPEC_CTRL msr content x86/speculation: Split out TIF update ptrace: Remove unused ptrace_may_access_sched() and MODE_IBRS x86/speculation: Prepare for conditional IBPB in switch_mm() x86/speculation: Avoid __switch_to_xtra() calls x86/process: Consolidate and simplify switch_to_xtra() code x86/speculation: Prepare for per task indirect branch speculation control x86/speculation: Add command line control for indirect branch speculation x86/speculation: Unify conditional spectre v2 print functions x86/speculataion: Mark command line parser data __initdata x86/speculation: Mark string arrays const correctly x86/speculation: Reorder the spec_v2 code x86/l1tf: Show actual SMT state x86/speculation: Rework SMT state change sched/smt: Expose sched_smt_present static key ...
2018-11-30unifdef: use memcpy instead of strncpyLinus Torvalds1-2/+2
New versions of gcc reasonably warn about the odd pattern of strncpy(p, q, strlen(q)); which really doesn't make sense: the strncpy() ends up being just a slow and odd way to write memcpy() in this case. There was a comment about _why_ the code used strncpy - to avoid the terminating NUL byte, but memcpy does the same and avoids the warning. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-11-29Merge tag 'drm-misc-next-2018-11-28' of ↵Dave Airlie1-78/+0
git://anongit.freedesktop.org/drm/drm-misc into drm-next drm-misc-next for v4.21: Core Changes: - Merge drm_info.c into drm_debugfs.c - Complete the fake drm_crtc_commit's hw_done/flip_done sooner. - Remove deprecated drm_obj_ref/unref functions. All drivers use get/put now. - Decrease stack use of drm_gem_prime_mmap. - Improve documentation for dumb callbacks. Driver Changes: - Add edid support to virtio. - Wait on implicit fence in meson and sun4i. - Add support for BGRX8888 to sun4i. - Preparation patches for sun4i driver to start supporting linear and tiled YUV formats. - Add support for HDMI 1.4 4k modes to meson, and support for VIC alternate timings. - Drop custom dumb_map in vkms. - Small fixes and cleanups to v3d. Signed-off-by: Dave Airlie <airlied@redhat.com> From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/151a3270-b1be-ed75-bd58-6b29d741f592@linux.intel.com
2018-11-28x86/retpoline: Make CONFIG_RETPOLINE depend on compiler supportZhenzhong Duan1-2/+0
Since retpoline capable compilers are widely available, make CONFIG_RETPOLINE hard depend on the compiler capability. Break the build when CONFIG_RETPOLINE is enabled and the compiler does not support it. Emit an error message in that case: "arch/x86/Makefile:226: *** You are building kernel with non-retpoline compiler, please update your compiler.. Stop." [dwmw: Fail the build with non-retpoline compiler] Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: David Woodhouse <dwmw@amazon.co.uk> Cc: Borislav Petkov <bp@suse.de> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: <srinivas.eeda@oracle.com> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/cca0cb20-f9e2-4094-840b-fb0f8810cd34@default
2018-11-24drm: remove no longer needed drm-get-put coccinelle scriptFernando Ramos1-78/+0
The coccinelle script was used to rename some (deprecated) functions which no longer exist now. Signed-off-by: Fernando Ramos <greenfoo@gluegarage.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20181115221634.22715-9-greenfoo@gluegarage.com
2018-11-18scripts/spdxcheck.py: make python3 compliantUwe Kleine-König1-1/+0
Without this change the following happens when using Python3 (3.6.6): $ echo "GPL-2.0" | python3 scripts/spdxcheck.py - FAIL: 'str' object has no attribute 'decode' Traceback (most recent call last): File "scripts/spdxcheck.py", line 253, in <module> parser.parse_lines(sys.stdin, args.maxlines, '-') File "scripts/spdxcheck.py", line 171, in parse_lines line = line.decode(locale.getpreferredencoding(False), errors='ignore') AttributeError: 'str' object has no attribute 'decode' So as the line is already a string, there is no need to decode it and the line can be dropped. /usr/bin/python on Arch is Python 3. So this would indeed be worth going into 4.19. Link: http://lkml.kernel.org/r/20181023070802.22558-1-u.kleine-koenig@pengutronix.de Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Joe Perches <joe@perches.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-11-18scripts/faddr2line: fix location of start_kernel in commentRandy Dunlap1-1/+1
Fix a source file reference location to the correct path name. Link: http://lkml.kernel.org/r/1d50bd3d-178e-dcd8-779f-9711887440eb@infradead.org Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-11-12checkpatch.pl: Suggest lockdep instead of asserting !spin_is_locked()Paul E. McKenney1-0/+6
This commit points people who might otherwise code up something like WARN_ON(!spin_is_locked(&mylock)) to lockdep_assert_held(&mylock). Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com> Cc: Andy Whitcroft <apw@canonical.com> Cc: Joe Perches <joe@perches.com>
2018-11-12checkpatch: Create table of obsolete APIs and apply to RCUJoe Perches1-0/+29
This patch creates a deprecated_apis map, which allows such APIs to be flagged with suggested replacements more compactly and straightforwardly. It also uses this map to flag the old flavorful RCU APIs as deprecated, suggesting their vanilla-RCU counterparts as replacements. Signed-off-by: Joe Perches <joe@perches.com> Cc: Andy Whitcroft <apw@canonical.com> Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com> [ paulmck: Merged with earlier less-deft approach. ]
2018-11-11builddeb: Fix inclusion of dtbs in debian packageRob Herring1-2/+2
Commit 37c8a5fafa3b ("kbuild: consolidate Devicetree dtb build rules") moved the location of 'dtbs_install' target which caused dtbs to not be installed when building debian package with 'bindeb-pkg' target. Update the builddeb script to use the same logic that determines if there's a 'dtbs_install' target which is presence of the arch dts directory. Also, use CONFIG_OF_EARLY_FLATTREE instead of CONFIG_OF as that's a better indication of whether we are building dtbs. This commit will also have the side effect of installing dtbs on any arch that has dts files. Previously, it was dependent on whether the arch defined 'dtbs_install'. Fixes: 37c8a5fafa3b ("kbuild: consolidate Devicetree dtb build rules") Reported-by: Nuno Gonçalves <nunojpg@gmail.com> Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-11-11Revert "scripts/setlocalversion: git: Make -dirty check more robust"Guenter Roeck1-1/+1
This reverts commit 6147b1cf19651c7de297e69108b141fb30aa2349. The reverted patch results in attempted write access to the source repository, even if that repository is mounted read-only. Output from "strace git status -uno --porcelain": getcwd("/tmp/linux-test", 129) = 16 open("/tmp/linux-test/.git/index.lock", O_RDWR|O_CREAT|O_EXCL|O_CLOEXEC, 0666) = -1 EROFS (Read-only file system) While git appears to be able to handle this situation, a monitored build environment (such as the one used for Chrome OS kernel builds) may detect it and bail out with an access violation error. On top of that, the attempted write access suggests that git _will_ write to the file even if a build output directory is specified. Users may have the reasonable expectation that the source repository remains untouched in that situation. Fixes: 6147b1cf19651 ("scripts/setlocalversion: git: Make -dirty check more robust" Cc: Genki Sky <sky@genki.is> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Brian Norris <briannorris@chromium.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-11-11kbuild: deb-pkg: fix too low build version numberMasahiro Yamada1-2/+5
Since commit b41d920acff8 ("kbuild: deb-pkg: split generating packaging and build"), the build version of the kernel contained in a deb package is too low by 1. Prior to the bad commit, the kernel was built first, then the number in .version file was read out, and written into the debian control file. Now, the debian control file is created before the kernel is actually compiled, which is causing the version number mismatch. Let the mkdebian script pass KBUILD_BUILD_VERSION=${revision} to require the build system to use the specified version number. Fixes: b41d920acff8 ("kbuild: deb-pkg: split generating packaging and build") Reported-by: Doug Smythies <dsmythies@telus.net> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Doug Smythies <dsmythies@telus.net>
2018-11-11kconfig: merge_config: avoid false positive matches from comment linesMasahiro Yamada1-3/+4
The current SED_CONFIG_EXP could match to comment lines in config fragment files, especially when CONFIG_PREFIX_ is empty. For example, Buildroot uses empty prefixing; starting symbols with BR2_ is just convention. Make the sed expression more robust against false positives from comment lines. The new sed expression matches to only valid patterns. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Petr Vorel <petr.vorel@gmail.com> Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
2018-11-06kbuild: deb-pkg: fix bindeb-pkg breakage when O= is usedMasahiro Yamada1-1/+1
Ard Biesheuvel reports bindeb-pkg with O= option is broken in the following way: ... LD [M] sound/soc/rockchip/snd-soc-rk3399-gru-sound.ko LD [M] sound/soc/rockchip/snd-soc-rockchip-pcm.ko LD [M] sound/soc/rockchip/snd-soc-rockchip-rt5645.ko LD [M] sound/soc/rockchip/snd-soc-rockchip-spdif.ko LD [M] sound/soc/sh/rcar/snd-soc-rcar.ko fakeroot -u debian/rules binary make KERNELRELEASE=4.19.0-12677-g19beffaf7a99-dirty ARCH=arm64 KBUILD_SRC= intdeb-pkg /bin/bash /home/ard/linux/scripts/package/builddeb Makefile:600: include/config/auto.conf: No such file or directory *** *** Configuration file ".config" not found! *** *** Please run some configurator (e.g. "make oldconfig" or *** "make menuconfig" or "make xconfig"). *** make[12]: *** [syncconfig] Error 1 make[11]: *** [syncconfig] Error 2 make[10]: *** [include/config/auto.conf] Error 2 make[9]: *** [__sub-make] Error 2 ... Prior to commit 80463f1b7bf9 ("kbuild: add --include-dir flag only for out-of-tree build"), both srctree and objtree were added to --include-dir redundantly, and the wrong code '$MAKE image_name' was working by relying on that. Now, the potential issue that had previously been hidden just showed up. '$MAKE image_name' recurses to the generated $(objtree)/Makefile and ends up with running in srctree, which is incorrect. It should be invoked with '-f $srctree/Makefile' (or KBUILD_SRC=) to be executed in objtree. Fixes: 80463f1b7bf9 ("kbuild: add --include-dir flag only for out-of-tree build") Reported-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
2018-11-06kbuild: rpm-pkg: fix binrpm-pkg breakage when O= is usedMasahiro Yamada1-5/+6
Zhenzhong Duan reported that running 'make O=/build/kernel binrpm-pkg' failed with the following errors: Running 'make O=/build/kernel binrpm-pkg' failed with below two errors. Makefile:600: include/config/auto.conf: No such file or directory + cp make -C /mnt/root/kernel O=/build/kernel image_name make -f /mnt/root/kernel/Makefile ... cp: invalid option -- 'C' Try 'cp --help' for more information. Prior to commit 80463f1b7bf9 ("kbuild: add --include-dir flag only for out-of-tree build"), both srctree and objtree were added to --include-dir redundantly, and the wrong code 'make image_name' was working by relying on that. Now, the potential issue that had previously been hidden just showed up. 'make image_name' recurses to the generated $(objtree)/Makefile and ends up with running in srctree, which is incorrect. It should be invoked with '-f $srctree/Makefile' (or KBUILD_SRC=) to be executed in objtree. Fixes: 80463f1b7bf9 ("kbuild: add --include-dir flag only for out-of-tree build") Reported-by: Zhenzhong Duan <zhenzhong.duan@oracle.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-11-03Merge tag 'kbuild-v4.20-2' of ↵Linus Torvalds5-32/+7
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - clean-up leftovers in Kconfig files - remove stale oldnoconfig and silentoldconfig targets - remove unneeded cc-fullversion and cc-name variables - improve merge_config script to allow overriding option prefix * tag 'kbuild-v4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kbuild: remove cc-name variable kbuild: replace cc-name test with CONFIG_CC_IS_CLANG merge_config.sh: Allow to define config prefix kbuild: remove unused cc-fullversion variable kconfig: remove silentoldconfig target kconfig: remove oldnoconfig target powerpc: PCI_MSI needs PCI powerpc: remove CONFIG_MCA leftovers powerpc: remove CONFIG_PCI_QSPAN scsi: aha152x: rename the PCMCIA define
2018-11-02kbuild: remove cc-name variableMasahiro Yamada1-4/+0
There is one more user of $(cc-name) in the top Makefile. It is supposed to detect Clang before invoking Kconfig, so it should still be there in the $(shell ...) form. All the other users of $(cc-name) have been replaced with $(CONFIG_CC_IS_CLANG). Hence, scripts/Kbuild.include does not need to define cc-name any more. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-11-02kbuild: replace cc-name test with CONFIG_CC_IS_CLANGMasahiro Yamada1-1/+1
Evaluating cc-name invokes the compiler every time even when you are not compiling anything, like 'make help'. This is not efficient. The compiler type has been already detected in the Kconfig stage. Use CONFIG_CC_IS_CLANG, instead. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Acked-by: Paul Burton <paul.burton@mips.com> (MIPS) Acked-by: Joel Stanley <joel@jms.id.au>
2018-11-01Merge tag 'compiler-attributes-for-linus-4.20-rc1' of ↵Linus Torvalds1-0/+1
https://github.com/ojeda/linux Pull compiler attribute updates from Miguel Ojeda: "This is an effort to disentangle the include/linux/compiler*.h headers and bring them up to date. The main idea behind the series is to use feature checking macros (i.e. __has_attribute) instead of compiler version checks (e.g. GCC_VERSION), which are compiler-agnostic (so they can be shared, reducing the size of compiler-specific headers) and version-agnostic. Other related improvements have been performed in the headers as well, which on top of the use of __has_attribute it has amounted to a significant simplification of these headers (e.g. GCC_VERSION is now only guarding a few non-attribute macros). This series should also help the efforts to support compiling the kernel with clang and icc. A fair amount of documentation and comments have also been added, clarified or removed; and the headers are now more readable, which should help kernel developers in general. The series was triggered due to the move to gcc >= 4.6. In turn, this series has also triggered Sparse to gain the ability to recognize __has_attribute on its own. Finally, the __nonstring variable attribute series has been also applied on top; plus two related patches from Nick Desaulniers for unreachable() that came a bit afterwards" * tag 'compiler-attributes-for-linus-4.20-rc1' of https://github.com/ojeda/linux: compiler-gcc: remove comment about gcc 4.5 from unreachable() compiler.h: update definition of unreachable() Compiler Attributes: ext4: remove local __nonstring definition Compiler Attributes: auxdisplay: panel: use __nonstring Compiler Attributes: enable -Wstringop-truncation on W=1 (gcc >= 8) Compiler Attributes: add support for __nonstring (gcc >= 8) Compiler Attributes: add MAINTAINERS entry Compiler Attributes: add Doc/process/programming-language.rst Compiler Attributes: remove uses of __attribute__ from compiler.h Compiler Attributes: KENTRY used twice the "used" attribute Compiler Attributes: use feature checks instead of version checks Compiler Attributes: add missing SPDX ID in compiler_types.h Compiler Attributes: remove unneeded sparse (__CHECKER__) tests Compiler Attributes: homogenize __must_be_array Compiler Attributes: remove unneeded tests Compiler Attributes: always use the extra-underscores syntax Compiler Attributes: remove unused attributes
2018-11-01Merge tag 'stackleak-v4.20-rc1' of ↵Linus Torvalds3-0/+488
git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull stackleak gcc plugin from Kees Cook: "Please pull this new GCC plugin, stackleak, for v4.20-rc1. This plugin was ported from grsecurity by Alexander Popov. It provides efficient stack content poisoning at syscall exit. This creates a defense against at least two classes of flaws: - Uninitialized stack usage. (We continue to work on improving the compiler to do this in other ways: e.g. unconditional zero init was proposed to GCC and Clang, and more plugin work has started too). - Stack content exposure. By greatly reducing the lifetime of valid stack contents, exposures via either direct read bugs or unknown cache side-channels become much more difficult to exploit. This complements the existing buddy and heap poisoning options, but provides the coverage for stacks. The x86 hooks are included in this series (which have been reviewed by Ingo, Dave Hansen, and Thomas Gleixner). The arm64 hooks have already been merged through the arm64 tree (written by Laura Abbott and reviewed by Mark Rutland and Will Deacon). With VLAs having been removed this release, there is no need for alloca() protection, so it has been removed from the plugin" * tag 'stackleak-v4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: arm64: Drop unneeded stackleak_check_alloca() stackleak: Allow runtime disabling of kernel stack erasing doc: self-protection: Add information about STACKLEAK feature fs/proc: Show STACKLEAK metrics in the /proc file system lkdtm: Add a test for STACKLEAK gcc-plugins: Add STACKLEAK plugin for tracking the kernel stack x86/entry: Add STACKLEAK erasing the kernel stack at the end of syscalls
2018-11-02merge_config.sh: Allow to define config prefixPetr Vorel1-1/+5
with CONFIG_ environment variable. merge_config.sh uses CONFIG_ which is used in kernel and other projects. There are some projects which use kconfig with different prefixes (e.g. buildroot: BR2_ prefix). CONFIG_ variable is already used for this purpose in kconfig binary (scripts/kconfig/lkc.h), let's use the same rule for in merge_config.sh. Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Petr Vorel <petr.vorel@gmail.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-11-02kbuild: remove unused cc-fullversion variableMasahiro Yamada1-4/+0
The last user of cc-fullversion was removed by commit f2910f0e6835 ("powerpc: remove old GCC version checks"). Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-11-02kconfig: remove silentoldconfig targetMasahiro Yamada1-8/+1
As commit 911a91c39cab ("kconfig: rename silentoldconfig to syncconfig") announced, it is time for the removal. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-11-02kconfig: remove oldnoconfig targetMasahiro Yamada2-15/+1
As commit 312ee68752fa ("kconfig: announce removal of oldnoconfig if used") announced, it is time for the removal. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-10-31checkpatch: remove GCC_BINARY_CONSTANT warningChristophe Leroy1-11/+0
This warning was there to avoid the use of 0bxxx values as they are not supported by gcc prior to v4.3 Since cafa0010cd51f ("Raise the minimum required gcc version to 4.6"), it's not an issue anymore and using such values can increase readability of code. Joe said: : Seems sensible as the other compilers also support binary literals from : relatively old versions. : http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3472.pdf : https://software.intel.com/en-us/articles/c14-features-supported-by-intel-c-compiler Link: http://lkml.kernel.org/r/392eeae782302ee8812a3c932a602035deed1609.1535351453.git.christophe.leroy@c-s.fr Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-10-28Merge tag 'vla-v4.20-rc1' of ↵Linus Torvalds1-1/+0
git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull VLA removal from Kees Cook: "Globally warn on VLA use. This turns on "-Wvla" globally now that the last few trees with their VLA removals have landed (crypto, block, net, and powerpc). Arnd mentioned that there may be a couple more VLAs hiding in hard-to-find randconfigs, but nothing big has shaken out in the last month or so in linux-next. We should be basically VLA-free now! Wheee. :) Summary: - Remove unused fallback for BUILD_BUG_ON (which technically contains a VLA) - Lift -Wvla to the top-level Makefile" * tag 'vla-v4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: Makefile: Globally enable VLA warning compiler.h: give up __compiletime_assert_fallback()
2018-10-28Merge tag 'kbuild-v4.20' of ↵Linus Torvalds6-68/+34
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - optimize kallsyms slightly - remove check for old CFLAGS usage - add some compiler flags unconditionally instead of evaluating $(call cc-option,...) - fix variable shadowing in host tools - refactor scripts/mkmakefile - refactor various makefiles * tag 'kbuild-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: modpost: Create macro to avoid variable shadowing ASN.1: Remove unnecessary shadowed local variable kbuild: use 'else ifeq' for checksrc to improve readability kbuild: remove unneeded link_multi_deps kbuild: add -Wno-unused-but-set-variable flag unconditionally kbuild: add -Wdeclaration-after-statement flag unconditionally kbuild: add -Wno-pointer-sign flag unconditionally modpost: remove leftover symbol prefix handling for module device table kbuild: simplify command line creation in scripts/mkmakefile kbuild: do not pass $(objtree) to scripts/mkmakefile kbuild: remove user ID check in scripts/mkmakefile kbuild: remove VERSION and PATCHLEVEL from $(objtree)/Makefile kbuild: add --include-dir flag only for out-of-tree build kbuild: remove dead code in cmd_files calculation in top Makefile kbuild: hide most of targets when running config or mixed targets kbuild: remove old check for CFLAGS use kbuild: prefix Makefile.dtbinst path with $(srctree) unconditionally kallsyms: remove left-over Blackfin code kallsyms: reduce size a little on 64-bit
2018-10-29modpost: Create macro to avoid variable shadowingLeonardo Bras1-4/+15
Create DEF_FIELD_ADDR_VAR as a more generic version of the DEF_FIELD_ADD macro, allowing usage of a variable name other than the struct element name. Also, sets DEF_FIELD_ADDR as a specific usage of DEF_FILD_ADDR_VAR in which the var name is the same as the struct element name. Then, makes use of DEF_FIELD_ADDR_VAR to create a variable of another name, in order to avoid variable shadowing. Signed-off-by: Leonardo Bras <leobras.c@gmail.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-10-29ASN.1: Remove unnecessary shadowed local variableLeonardo Bras1-1/+1
Remove an unnecessary shadowed local variable (start). It was used only once, with the same value it was started before the if block. Signed-off-by: Leonardo Bras <leobras.c@gmail.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-10-26Merge branch 'akpm' (patches from Andrew)Linus Torvalds1-1/+1
Merge updates from Andrew Morton: - a few misc things - ocfs2 updates - most of MM * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (132 commits) hugetlbfs: dirty pages as they are added to pagecache mm: export add_swap_extent() mm: split SWP_FILE into SWP_ACTIVATED and SWP_FS tools/testing/selftests/vm/map_fixed_noreplace.c: add test for MAP_FIXED_NOREPLACE mm: thp: relocate flush_cache_range() in migrate_misplaced_transhuge_page() mm: thp: fix mmu_notifier in migrate_misplaced_transhuge_page() mm: thp: fix MADV_DONTNEED vs migrate_misplaced_transhuge_page race condition mm/kasan/quarantine.c: make quarantine_lock a raw_spinlock_t mm/gup: cache dev_pagemap while pinning pages Revert "x86/e820: put !E820_TYPE_RAM regions into memblock.reserved" mm: return zero_resv_unavail optimization mm: zero remaining unavailable struct pages tools/testing/selftests/vm/gup_benchmark.c: add MAP_HUGETLB option tools/testing/selftests/vm/gup_benchmark.c: add MAP_SHARED option tools/testing/selftests/vm/gup_benchmark.c: allow user specified file tools/testing/selftests/vm/gup_benchmark.c: fix 'write' flag usage mm/gup_benchmark.c: add additional pinning methods mm/gup_benchmark.c: time put_page() mm: don't raise MEMCG_OOM event due to failed high-order allocation mm/page-writeback.c: fix range_cyclic writeback vs writepages deadlock ...
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