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2019-12-25Merge tag 'v5.5-rc3' into sched/core, to pick up fixesIngo Molnar3-0/+5
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-08sched/rt, xtensa: Use CONFIG_PREEMPTIONThomas Gleixner2-3/+6
CONFIG_PREEMPTION is selected by CONFIG_PREEMPT and by CONFIG_PREEMPT_RT. Both PREEMPT and PREEMPT_RT require the same functionality which today depends on CONFIG_PREEMPT. Switch the entry code over to use CONFIG_PREEMPTION. Add PREEMPT_RT output to die(). [bigeasy: +traps.c] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Cc: Chris Zankel <chris@zankel.net> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: linux-xtensa@linux-xtensa.org Link: https://lore.kernel.org/r/20191015191821.11479-21-bigeasy@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04arch: sembuf.h: make uapi asm/sembuf.h self-containedMasahiro Yamada1-0/+1
Userspace cannot compile <asm/sembuf.h> due to some missing type definitions. For example, building it for x86 fails as follows: CC usr/include/asm/sembuf.h.s In file included from <command-line>:32:0: usr/include/asm/sembuf.h:17:20: error: field `sem_perm' has incomplete type struct ipc64_perm sem_perm; /* permissions .. see ipc.h */ ^~~~~~~~ usr/include/asm/sembuf.h:24:2: error: unknown type name `__kernel_time_t' __kernel_time_t sem_otime; /* last semop time */ ^~~~~~~~~~~~~~~ usr/include/asm/sembuf.h:25:2: error: unknown type name `__kernel_ulong_t' __kernel_ulong_t __unused1; ^~~~~~~~~~~~~~~~ usr/include/asm/sembuf.h:26:2: error: unknown type name `__kernel_time_t' __kernel_time_t sem_ctime; /* last change time */ ^~~~~~~~~~~~~~~ usr/include/asm/sembuf.h:27:2: error: unknown type name `__kernel_ulong_t' __kernel_ulong_t __unused2; ^~~~~~~~~~~~~~~~ usr/include/asm/sembuf.h:29:2: error: unknown type name `__kernel_ulong_t' __kernel_ulong_t sem_nsems; /* no. of semaphores in array */ ^~~~~~~~~~~~~~~~ usr/include/asm/sembuf.h:30:2: error: unknown type name `__kernel_ulong_t' __kernel_ulong_t __unused3; ^~~~~~~~~~~~~~~~ usr/include/asm/sembuf.h:31:2: error: unknown type name `__kernel_ulong_t' __kernel_ulong_t __unused4; ^~~~~~~~~~~~~~~~ It is just a matter of missing include directive. Include <asm/ipcbuf.h> to make it self-contained, and add it to the compile-test coverage. Link: http://lkml.kernel.org/r/20191030063855.9989-3-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-12-04arch: msgbuf.h: make uapi asm/msgbuf.h self-containedMasahiro Yamada1-0/+2
Userspace cannot compile <asm/msgbuf.h> due to some missing type definitions. For example, building it for x86 fails as follows: CC usr/include/asm/msgbuf.h.s In file included from usr/include/asm/msgbuf.h:6:0, from <command-line>:32: usr/include/asm-generic/msgbuf.h:25:20: error: field `msg_perm' has incomplete type struct ipc64_perm msg_perm; ^~~~~~~~ usr/include/asm-generic/msgbuf.h:27:2: error: unknown type name `__kernel_time_t' __kernel_time_t msg_stime; /* last msgsnd time */ ^~~~~~~~~~~~~~~ usr/include/asm-generic/msgbuf.h:28:2: error: unknown type name `__kernel_time_t' __kernel_time_t msg_rtime; /* last msgrcv time */ ^~~~~~~~~~~~~~~ usr/include/asm-generic/msgbuf.h:29:2: error: unknown type name `__kernel_time_t' __kernel_time_t msg_ctime; /* last change time */ ^~~~~~~~~~~~~~~ usr/include/asm-generic/msgbuf.h:41:2: error: unknown type name `__kernel_pid_t' __kernel_pid_t msg_lspid; /* pid of last msgsnd */ ^~~~~~~~~~~~~~ usr/include/asm-generic/msgbuf.h:42:2: error: unknown type name `__kernel_pid_t' __kernel_pid_t msg_lrpid; /* last receive pid */ ^~~~~~~~~~~~~~ It is just a matter of missing include directive. Include <asm/ipcbuf.h> to make it self-contained, and add it to the compile-test coverage. Link: http://lkml.kernel.org/r/20191030063855.9989-2-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-12-04arch: ipcbuf.h: make uapi asm/ipcbuf.h self-containedMasahiro Yamada1-0/+2
Userspace cannot compile <asm/ipcbuf.h> due to some missing type definitions. For example, building it for x86 fails as follows: CC usr/include/asm/ipcbuf.h.s In file included from usr/include/asm/ipcbuf.h:1:0, from <command-line>:32: usr/include/asm-generic/ipcbuf.h:21:2: error: unknown type name `__kernel_key_t' __kernel_key_t key; ^~~~~~~~~~~~~~ usr/include/asm-generic/ipcbuf.h:22:2: error: unknown type name `__kernel_uid32_t' __kernel_uid32_t uid; ^~~~~~~~~~~~~~~~ usr/include/asm-generic/ipcbuf.h:23:2: error: unknown type name `__kernel_gid32_t' __kernel_gid32_t gid; ^~~~~~~~~~~~~~~~ usr/include/asm-generic/ipcbuf.h:24:2: error: unknown type name `__kernel_uid32_t' __kernel_uid32_t cuid; ^~~~~~~~~~~~~~~~ usr/include/asm-generic/ipcbuf.h:25:2: error: unknown type name `__kernel_gid32_t' __kernel_gid32_t cgid; ^~~~~~~~~~~~~~~~ usr/include/asm-generic/ipcbuf.h:26:2: error: unknown type name `__kernel_mode_t' __kernel_mode_t mode; ^~~~~~~~~~~~~~~ usr/include/asm-generic/ipcbuf.h:28:35: error: `__kernel_mode_t' undeclared here (not in a function) unsigned char __pad1[4 - sizeof(__kernel_mode_t)]; ^~~~~~~~~~~~~~~ usr/include/asm-generic/ipcbuf.h:31:2: error: unknown type name `__kernel_ulong_t' __kernel_ulong_t __unused1; ^~~~~~~~~~~~~~~~ usr/include/asm-generic/ipcbuf.h:32:2: error: unknown type name `__kernel_ulong_t' __kernel_ulong_t __unused2; ^~~~~~~~~~~~~~~~ It is just a matter of missing include directive. Include <linux/posix_types.h> to make it self-contained, and add it to the compile-test coverage. Link: http://lkml.kernel.org/r/20191030063855.9989-1-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-12-03Merge tag 'xtensa-20191201' of git://github.com/jcmvbkbc/linux-xtensaLinus Torvalds36-662/+771
Pull Xtensa updates from Max Filippov: - add support for execute in place (XIP) kernels - improvements in inline assembly: use named arguments and "m" constraints where possible - improve stack dumping - clean up system_call code and syscall tracing - various small fixes and cleanups * tag 'xtensa-20191201' of git://github.com/jcmvbkbc/linux-xtensa: (30 commits) xtensa: clean up system_call/xtensa_rt_sigreturn interaction xtensa: fix system_call interaction with ptrace xtensa: rearrange syscall tracing xtensa: fix syscall_set_return_value xtensa: drop unneeded headers from coprocessor.S xtensa: entry: Remove unneeded need_resched() loop xtensa: use MEMBLOCK_ALLOC_ANYWHERE for KASAN shadow map xtensa: fix TLB sanity checker xtensa: get rid of __ARCH_USE_5LEVEL_HACK xtensa: mm: fix PMD folding implementation xtensa: make stack dump size configurable xtensa: improve stack dumping xtensa: use "m" constraint instead of "r" in futex.h assembly xtensa: use "m" constraint instead of "a" in cmpxchg.h assembly xtensa: use named assembly arguments in cmpxchg.h xtensa: use "m" constraint instead of "a" in atomic.h assembly xtensa: use named assembly arguments in atomic.h xtensa: use "m" constraint instead of "a" in bitops.h assembly xtensa: use named assembly arguments in bitops.h xtensa: use macros to generate *_bit and test_and_*_bit functions ...
2019-12-01Merge branch 'for-linus' of ↵Linus Torvalds7-7/+0
git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace Pull sysctl system call removal from Eric Biederman: "As far as I can tell we have reached the point where no one enables the sysctl system call anymore. It still is enabled in a few defconfigs but they are mostly the rarely used one and in asking people about that it was more cut & paste enabled than anything else. This is single commit that just deletes code. Leaving just enough code so that the deprecated sysctl warning continues to be printed. If my analysis turns out to be wrong and someone actually cares it will be easy to revert this commit and have the system call again. There was one new xtensa defconfig in linux-next that enabled the system call this cycle and when asked about it the maintainer of the code replied that it was not enabled on purpose. As of today's linux-next tree that defconfig no longer enables the system call. What we saw in the review discussion was that if we go a step farther than my patch and mess with uapi headers there are pieces of code that won't compile, but nothing minds the system call actually disappearing from the kernel" Link: https://lore.kernel.org/lkml/201910011140.EA0181F13@keescook/ * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: sysctl: Remove the sysctl system call
2019-11-29xtensa: clean up system_call/xtensa_rt_sigreturn interactionMax Filippov3-10/+6
system_call assembly code always pushes pointer to struct pt_regs as the last additional parameter for all system calls. The only user of this feature is xtensa_rt_sigreturn. Avoid this special case. Define xtensa_rt_sigreturn as accepting no argiments. Use current_pt_regs to get pointer to struct pt_regs in xtensa_rt_sigreturn. Don't pass additional parameter from system_call code. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-29xtensa: fix system_call interaction with ptraceMax Filippov2-4/+18
Don't overwrite return value if system call was cancelled at entry by ptrace. Return status code from do_syscall_trace_enter so that pt_regs::syscall doesn't need to be changed to skip syscall. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-29xtensa: rearrange syscall tracingMax Filippov3-7/+4
system_call saves and restores syscall number across system call to make clone and execv entry and exit tracing match. This complicates things when syscall code may be changed by ptrace. Preserve syscall code in copy_thread and start_thread directly instead of doing tricks in system_call. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-28Merge branch 'master' of ↵Linus Torvalds4-143/+22
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux; tag 'dma-mapping-5.5' of git://git.infradead.org/users/hch/dma-mapping Pull dma-mapping updates from Christoph Hellwig: - improve dma-debug scalability (Eric Dumazet) - tiny dma-debug cleanup (Dan Carpenter) - check for vmap memory in dma_map_single (Kees Cook) - check for dma_addr_t overflows in dma-direct when using DMA offsets (Nicolas Saenz Julienne) - switch the x86 sta2x11 SOC to use more generic DMA code (Nicolas Saenz Julienne) - fix arm-nommu dma-ranges handling (Vladimir Murzin) - use __initdata in CMA (Shyam Saini) - replace the bus dma mask with a limit (Nicolas Saenz Julienne) - merge the remapping helpers into the main dma-direct flow (me) - switch xtensa to the generic dma remap handling (me) - various cleanups around dma_capable (me) - remove unused dev arguments to various dma-noncoherent helpers (me) * 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux: * tag 'dma-mapping-5.5' of git://git.infradead.org/users/hch/dma-mapping: (22 commits) dma-mapping: treat dev->bus_dma_mask as a DMA limit dma-direct: exclude dma_direct_map_resource from the min_low_pfn check dma-direct: don't check swiotlb=force in dma_direct_map_resource dma-debug: clean up put_hash_bucket() powerpc: remove support for NULL dev in __phys_to_dma / __dma_to_phys dma-direct: avoid a forward declaration for phys_to_dma dma-direct: unify the dma_capable definitions dma-mapping: drop the dev argument to arch_sync_dma_for_* x86/PCI: sta2x11: use default DMA address translation dma-direct: check for overflows on 32 bit DMA addresses dma-debug: increase HASH_SIZE dma-debug: reorder struct dma_debug_entry fields xtensa: use the generic uncached segment support dma-mapping: merge the generic remapping helpers into dma-direct dma-direct: provide mmap and get_sgtable method overrides dma-direct: remove the dma_handle argument to __dma_direct_alloc_pages dma-direct: remove __dma_direct_free_pages usb: core: Remove redundant vmap checks kernel: dma-contiguous: mark CMA parameters __initdata/__initconst dma-debug: add a schedule point in debug_dma_dump_mappings() ...
2019-11-28Merge tag 'ioremap-5.5' of git://git.infradead.org/users/hch/ioremapLinus Torvalds1-11/+1
Pull generic ioremap support from Christoph Hellwig: "This adds the remaining bits for an entirely generic ioremap and iounmap to lib/ioremap.c. To facilitate that, it cleans up the giant mess of weird ioremap variants we had with no users outside the arch code. For now just the three newest ports use the code, but there is more than a handful others that can be converted without too much work. Summary: - clean up various obsolete ioremap and iounmap variants - add a new generic ioremap implementation and switch csky, nds32 and riscv over to it" * tag 'ioremap-5.5' of git://git.infradead.org/users/hch/ioremap: (21 commits) nds32: use generic ioremap csky: use generic ioremap csky: remove ioremap_cache riscv: use the generic ioremap code lib: provide a simple generic ioremap implementation sh: remove __iounmap nios2: remove __iounmap hexagon: remove __iounmap m68k: rename __iounmap and mark it static arch: rely on asm-generic/io.h for default ioremap_* definitions asm-generic: don't provide ioremap for CONFIG_MMU asm-generic: ioremap_uc should behave the same with and without MMU xtensa: clean up ioremap x86: Clean up ioremap() parisc: remove __ioremap nios2: remove __ioremap alpha: remove the unused __ioremap wrapper hexagon: clean up ioremap ia64: rename ioremap_nocache to ioremap_uc unicore32: remove ioremap_cached ...
2019-11-26xtensa: fix syscall_set_return_valueMax Filippov1-1/+1
syscall return value is in the register a2, not a0. Cc: stable@vger.kernel.org # v5.0+ Fixes: 9f24f3c1067c ("xtensa: implement tracehook functions and enable HAVE_ARCH_TRACEHOOK") Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-26xtensa: drop unneeded headers from coprocessor.SMax Filippov1-9/+1
A bunch of irrelevant headers is included into coprocessor.S. Remove them and add necessary asm/regs.h. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-26xtensa: entry: Remove unneeded need_resched() loopValentin Schneider1-1/+1
Since the enabling and disabling of IRQs within preempt_schedule_irq() is contained in a need_resched() loop, we don't need the outer arch code loop. Acked-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Valentin Schneider <valentin.schneider@arm.com> Message-Id: <20190923143620.29334-10-valentin.schneider@arm.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-26xtensa: use MEMBLOCK_ALLOC_ANYWHERE for KASAN shadow mapMax Filippov1-1/+3
KASAN shadow map doesn't need to be accessible through the linear kernel mapping, allocate its pages with MEMBLOCK_ALLOC_ANYWHERE so that high memory can be used. This frees up to ~100MB of low memory on xtensa configurations with KASAN and high memory. Cc: stable@vger.kernel.org # v5.1+ Fixes: f240ec09bb8a ("memblock: replace memblock_alloc_base(ANYWHERE) with memblock_phys_alloc") Reviewed-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-26xtensa: fix TLB sanity checkerMax Filippov1-2/+2
Virtual and translated addresses retrieved by the xtensa TLB sanity checker must be consistent, i.e. correspond to the same state of the checked TLB entry. KASAN shadow memory is mapped dynamically using auto-refill TLB entries and thus may change TLB state between the virtual and translated address retrieval, resulting in false TLB insanity report. Move read_xtlb_translation close to read_xtlb_virtual to make sure that read values are consistent. Cc: stable@vger.kernel.org Fixes: a99e07ee5e88 ("xtensa: check TLB sanity on return to userspace") Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-26xtensa: get rid of __ARCH_USE_5LEVEL_HACKMike Rapoport6-10/+24
xtensa has 2-level page tables and already uses pgtable-nopmd for page table folding. Add walks of p4d level where appropriate and drop usage of __ARCH_USE_5LEVEL_HACK. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Message-Id: <1572964400-16542-3-git-send-email-rppt@kernel.org> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> [fix up arch/xtensa/include/asm/fixmap.h and arch/xtensa/mm/tlb.c]
2019-11-26xtensa: mm: fix PMD folding implementationMike Rapoport5-9/+19
There was a definition of pmd_offset() in arch/xtensa/include/asm/pgtable.h that shadowed the generic implementation defined in include/asm-generic/pgtable-nopmd.h. As the result, xtensa had shortcuts in page table traversal in several places instead of doing level unfolding. Remove local override for pmd_offset() and add page table unfolding where necessary. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Message-Id: <1572964400-16542-2-git-send-email-rppt@kernel.org> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-26xtensa: make stack dump size configurableMax Filippov2-1/+8
Introduce Kconfig symbol PRINT_STACK_DEPTH and use it to initialize kstack_depth_to_print. Reviewed-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-26xtensa: improve stack dumpingMax Filippov1-16/+11
Calculate printable stack size and use print_hex_dump instead of opencoding it. Drop extra newline output in show_trace as its output format does not depend on CONFIG_KALLSYMS. Reviewed-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-26xtensa: use "m" constraint instead of "r" in futex.h assemblyMax Filippov1-5/+5
Use "m" constraint instead of "r" for the address, as "m" allows compiler to access adjacent locations using base + offset, while "r" requires updating the base register every time. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-26xtensa: use "m" constraint instead of "a" in cmpxchg.h assemblyMax Filippov1-15/+16
Use "m" constraint instead of "r" for the address, as "m" allows compiler to access adjacent locations using base + offset, while "r" requires updating the base register every time. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-26xtensa: use named assembly arguments in cmpxchg.hMax Filippov1-35/+35
Numeric assembly arguments are hard to understand and assembly code that uses them is hard to modify. Use named arguments in __cmpxchg_u32 and xchg_u32. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-26xtensa: use "m" constraint instead of "a" in atomic.h assemblyMax Filippov1-24/+28
Use "m" constraint instead of "r" for the address, as "m" allows compiler to access adjacent locations using base + offset, while "r" requires updating the base register every time. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-26xtensa: use named assembly arguments in atomic.hMax Filippov1-60/+60
Numeric assembly arguments are hard to understand and assembly code that uses them is hard to modify. Use named arguments in ATOMIC_OP, ATOMIC_OP_RETURN and ATOMIC_FETCH_OP macros. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-26xtensa: use "m" constraint instead of "a" in bitops.h assemblyMax Filippov1-8/+10
Use "m" constraint instead of "r" for the address, as "m" allows compiler to access adjacent locations using base + offset, while "r" requires updating the base register every time. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-26xtensa: use named assembly arguments in bitops.hMax Filippov1-28/+28
Numeric assembly arguments are hard to understand and assembly code that uses them is hard to modify. Use named arguments in BIT_OP and TEST_AND_BIT_OP macros. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-26xtensa: use macros to generate *_bit and test_and_*_bit functionsMax Filippov1-229/+92
Parameterize macros with function name, opcode and inversion pattern. This reduces code duplication removing 2/3 of definitions. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-26xtensa: use "m" constraint instead of "a" in uaccess.h assemblyMax Filippov1-8/+8
Use "m" constraint instead of "r" for the address, as "m" allows compiler to access adjacent locations using base + offset, while "r" requires updating the base register every time. Use %[mem] * 0 + v to replace offset part of %[mem] expansion with v. It is impossible to change address alignment through the offset part on xtensa, so just ignore offset in alignment checks. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-26xtensa: merge .fixup with .textMax Filippov1-5/+1
Section .fixup contains pieces of code, merge it with the rest of the .text section. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-26xtensa: add XIP kernel supportMax Filippov10-5/+257
XIP (eXecute In Place) kernel image is the image that can be run directly from ROM, using RAM only for writable data. XIP xtensa kernel differs from regular xtensa kernel in the following ways: - it has exception/IRQ vectors merged into text section. No vectors relocation takes place at kernel startup. - .data/.bss location must be specified in the kernel configuration, its content is copied there in the _startup function. - .init.text is merged with the rest of text and is executed from ROM. - when MMU is used the virtual address where the kernel will be mapped must be specified in the kernel configuration. It may be in the KSEG or in the KIO, __pa macro is adjusted to be able to handle both. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-26sysctl: Remove the sysctl system callEric W. Biederman7-7/+0
This system call has been deprecated almost since it was introduced, and in a survey of the linux distributions I can no longer find any of them that enable CONFIG_SYSCTL_SYSCALL. The only indication that I can find that anyone might care is that a few of the defconfigs in the kernel enable CONFIG_SYSCTL_SYSCALL. However this appears in only 31 of 414 defconfigs in the kernel, so I suspect this symbols presence is simply because it is harmless to include rather than because it is necessary. As there appear to be no users of the sysctl system call, remove the code. As this removes one of the few uses of the internal kernel mount of proc I hope this allows for even more simplifications of the proc filesystem. Cc: Alex Smith <alex.smith@imgtec.com> Cc: Anders Berg <anders.berg@lsi.com> Cc: Apelete Seketeli <apelete@seketeli.net> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Chee Nouk Phoon <cnphoon@altera.com> Cc: Chris Zankel <chris@zankel.net> Cc: Christian Ruppert <christian.ruppert@abilis.com> Cc: Greg Ungerer <gerg@uclinux.org> Cc: Harvey Hunt <harvey.hunt@imgtec.com> Cc: Helge Deller <deller@gmx.de> Cc: Hongliang Tao <taohl@lemote.com> Cc: Hua Yan <yanh@lemote.com> Cc: Huacai Chen <chenhc@lemote.com> Cc: John Crispin <blogic@openwrt.org> Cc: Jonas Jensen <jonas.jensen@gmail.com> Cc: Josh Boyer <jwboyer@gmail.com> Cc: Jun Nie <jun.nie@linaro.org> Cc: Kevin Hilman <khilman@linaro.org> Cc: Kevin Wells <kevin.wells@nxp.com> Cc: Kumar Gala <galak@codeaurora.org> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Ley Foon Tan <lftan@altera.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Markos Chandras <markos.chandras@imgtec.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Noam Camus <noamc@ezchip.com> Cc: Olof Johansson <olof@lixom.net> Cc: Paul Burton <paul.burton@mips.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Phil Edworthy <phil.edworthy@renesas.com> Cc: Pierrick Hascoet <pierrick.hascoet@abilis.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Roland Stigge <stigge@antcom.de> Cc: Santosh Shilimkar <santosh.shilimkar@ti.com> Cc: Scott Telford <stelford@cadence.com> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: Tanmay Inamdar <tinamdar@apm.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Andi Kleen <ak@linux.intel.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2019-11-26Merge branch 'x86-asm-for-linus' of ↵Linus Torvalds1-4/+4
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 asm updates from Ingo Molnar: "The main changes in this cycle were: - Cross-arch changes to move the linker sections for NOTES and EXCEPTION_TABLE into the RO_DATA area, where they belong on most architectures. (Kees Cook) - Switch the x86 linker fill byte from x90 (NOP) to 0xcc (INT3), to trap jumps into the middle of those padding areas instead of sliding execution. (Kees Cook) - A thorough cleanup of symbol definitions within x86 assembler code. The rather randomly named macros got streamlined around a (hopefully) straightforward naming scheme: SYM_START(name, linkage, align...) SYM_END(name, sym_type) SYM_FUNC_START(name) SYM_FUNC_END(name) SYM_CODE_START(name) SYM_CODE_END(name) SYM_DATA_START(name) SYM_DATA_END(name) etc - with about three times of these basic primitives with some label, local symbol or attribute variant, expressed via postfixes. No change in functionality intended. (Jiri Slaby) - Misc other changes, cleanups and smaller fixes" * 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (67 commits) x86/entry/64: Remove pointless jump in paranoid_exit x86/entry/32: Remove unused resume_userspace label x86/build/vdso: Remove meaningless CFLAGS_REMOVE_*.o m68k: Convert missed RODATA to RO_DATA x86/vmlinux: Use INT3 instead of NOP for linker fill bytes x86/mm: Report actual image regions in /proc/iomem x86/mm: Report which part of kernel image is freed x86/mm: Remove redundant address-of operators on addresses xtensa: Move EXCEPTION_TABLE to RO_DATA segment powerpc: Move EXCEPTION_TABLE to RO_DATA segment parisc: Move EXCEPTION_TABLE to RO_DATA segment microblaze: Move EXCEPTION_TABLE to RO_DATA segment ia64: Move EXCEPTION_TABLE to RO_DATA segment h8300: Move EXCEPTION_TABLE to RO_DATA segment c6x: Move EXCEPTION_TABLE to RO_DATA segment arm64: Move EXCEPTION_TABLE to RO_DATA segment alpha: Move EXCEPTION_TABLE to RO_DATA segment x86/vmlinux: Move EXCEPTION_TABLE to RO_DATA segment x86/vmlinux: Actually use _etext for the end of the text segment vmlinux.lds.h: Allow EXCEPTION_TABLE to live in RO_DATA ...
2019-11-20dma-mapping: drop the dev argument to arch_sync_dma_for_*Christoph Hellwig1-4/+4
These are pure cache maintainance routines, so drop the unused struct device argument. Signed-off-by: Christoph Hellwig <hch@lst.de> Suggested-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2019-11-11arch: rely on asm-generic/io.h for default ioremap_* definitionsChristoph Hellwig1-4/+0
Various architectures that use asm-generic/io.h still defined their own default versions of ioremap_nocache, ioremap_wt and ioremap_wc that point back to plain ioremap directly or indirectly. Remove these definitions and rely on asm-generic/io.h instead. For this to work the backup ioremap_* defintions needs to be changed to purely cpp macros instea of inlines to cover for architectures like openrisc that only define ioremap after including <asm-generic/io.h>. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Palmer Dabbelt <palmer@dabbelt.com>
2019-11-11xtensa: clean up ioremapChristoph Hellwig1-10/+4
Use ioremap as the main implemented function, and defined ioremap_nocache to it as a deprecated alias. Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-11-11xtensa: use the generic uncached segment supportChristoph Hellwig4-139/+18
Switch xtensa over to use the generic uncached support, and thus the generic implementations of dma_alloc_* and dma_alloc_*, which also gains support for mmaping DMA memory. The non-working nommu DMA support has been disabled, but could be re-enabled easily if platforms that actually have an uncached segment show up. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Max Filippov <jcmvbkbc@gmail.com> Tested-by: Max Filippov <jcmvbkbc@gmail.com>
2019-11-04xtensa: Move EXCEPTION_TABLE to RO_DATA segmentKees Cook1-1/+2
Since the EXCEPTION_TABLE is read-only, collapse it into RO_DATA. Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Chris Zankel <chris@zankel.net> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: linux-alpha@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-c6x-dev@linux-c6x.org Cc: linux-ia64@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-s390@vger.kernel.org Cc: linux-xtensa@linux-xtensa.org Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Rick Edgecombe <rick.p.edgecombe@intel.com> Cc: Segher Boessenkool <segher@kernel.crashing.org> Cc: Will Deacon <will@kernel.org> Cc: x86-ml <x86@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Link: https://lkml.kernel.org/r/20191029211351.13243-26-keescook@chromium.org
2019-11-04vmlinux.lds.h: Replace RW_DATA_SECTION with RW_DATAKees Cook1-1/+1
Rename RW_DATA_SECTION to RW_DATA. (Calling this a "section" is a lie, since it's multiple sections and section flags cannot be applied to the macro.) Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> # s390 Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> # m68k Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: linux-alpha@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-c6x-dev@linux-c6x.org Cc: linux-ia64@vger.kernel.org Cc: linux-s390@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Rick Edgecombe <rick.p.edgecombe@intel.com> Cc: Segher Boessenkool <segher@kernel.crashing.org> Cc: Will Deacon <will@kernel.org> Cc: x86-ml <x86@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Link: https://lkml.kernel.org/r/20191029211351.13243-14-keescook@chromium.org
2019-11-04vmlinux.lds.h: Replace RODATA with RO_DATAKees Cook1-1/+1
There's no reason to keep the RODATA macro: replace the callers with the expected RO_DATA macro. Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: linux-alpha@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-c6x-dev@linux-c6x.org Cc: linux-ia64@vger.kernel.org Cc: linux-s390@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Rick Edgecombe <rick.p.edgecombe@intel.com> Cc: Segher Boessenkool <segher@kernel.crashing.org> Cc: Will Deacon <will@kernel.org> Cc: x86-ml <x86@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Link: https://lkml.kernel.org/r/20191029211351.13243-12-keescook@chromium.org
2019-11-04vmlinux.lds.h: Move NOTES into RO_DATAKees Cook1-1/+0
The .notes section should be non-executable read-only data. As such, move it to the RO_DATA macro instead of being per-architecture defined. Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> # s390 Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: linux-alpha@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-c6x-dev@linux-c6x.org Cc: linux-ia64@vger.kernel.org Cc: linux-s390@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Rick Edgecombe <rick.p.edgecombe@intel.com> Cc: Segher Boessenkool <segher@kernel.crashing.org> Cc: Will Deacon <will@kernel.org> Cc: x86-ml <x86@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Link: https://lkml.kernel.org/r/20191029211351.13243-11-keescook@chromium.org
2019-10-20xtensa: move kernel memory layout to platform optionsMax Filippov1-173/+175
Currently kernel memory layout settings are split between "Processor type and features" and "Platform options" menus. Consolidate them under "Platform options". Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-10-20xtensa: use correct symbol for the end of .rodataMax Filippov1-2/+2
Use correct symbol for the end of .rodata section when dumping virtual memory layout. This fixes odd rodata size with XIP kernel. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-10-20xtensa: fix section name for start_infoMax Filippov1-3/+3
.data.init.refok has been removed from the kernel long ago, replaced with __REFDATA. Fix start_info definition. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-10-20xtensa: move MPU constants from .data to .ref.rodataMax Filippov1-1/+2
MPU attribute mapping table is R/O, move it from .data to __REFCONST (as the rest of the _startup code where initialize_cacheattr is used is in the __REF section). This allows executing initialize_cacheattr before the data section of the XIP kernel is relocated to its place. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-10-20xtensa: move XCHAL_KIO_* definitions to kmem_layout.hMax Filippov2-39/+32
These address and size definitions define xtensa kernel memory layout, move them from vectors.h to the kmem_layout.h Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-10-20xtensa: clean up empty include filesMax Filippov3-34/+2
Remove empty hw_irq.h and user.h from arch/xtensa/include/asm and use generic versions instead. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-10-16xtensa: fix change_bit in exclusive access optionMax Filippov1-1/+1
change_bit implementation for XCHAL_HAVE_EXCLUSIVE case changes all bits except the one required due to copy-paste error from clear_bit. Cc: stable@vger.kernel.org # v5.2+ Fixes: f7c34874f04a ("xtensa: add exclusive atomics support") Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2019-10-15xtensa: virt: fix PCI IO ports mappingMax Filippov1-1/+1
virt device tree incorrectly uses 0xf0000000 on both sides of PCI IO ports address space mapping. This results in incorrect port address assignment in PCI IO BARs and subsequent crash on attempt to access them. Use 0 as base address in PCI IO ports address space. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 14:31:37 +0000