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2013-11-13Merge branch 'akpm' (patches from Andrew Morton)Linus Torvalds1-1/+1
Merge first patch-bomb from Andrew Morton: "Quite a lot of other stuff is banked up awaiting further next->mainline merging, but this batch contains: - Lots of random misc patches - OCFS2 - Most of MM - backlight updates - lib/ updates - printk updates - checkpatch updates - epoll tweaking - rtc updates - hfs - hfsplus - documentation - procfs - update gcov to gcc-4.7 format - IPC" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (269 commits) ipc, msg: fix message length check for negative values ipc/util.c: remove unnecessary work pending test devpts: plug the memory leak in kill_sb ./Makefile: export initial ramdisk compression config option init/Kconfig: add option to disable kernel compression drivers: w1: make w1_slave::flags long to avoid memory corruption drivers/w1/masters/ds1wm.cuse dev_get_platdata() drivers/memstick/core/ms_block.c: fix unreachable state in h_msb_read_page() drivers/memstick/core/mspro_block.c: fix attributes array allocation drivers/pps/clients/pps-gpio.c: remove redundant of_match_ptr kernel/panic.c: reduce 1 byte usage for print tainted buffer gcov: reuse kbasename helper kernel/gcov/fs.c: use pr_warn() kernel/module.c: use pr_foo() gcov: compile specific gcov implementation based on gcc version gcov: add support for gcc 4.7 gcov format gcov: move gcov structs definitions to a gcc version specific file kernel/taskstats.c: return -ENOMEM when alloc memory fails in add_del_listener() kernel/taskstats.c: add nla_nest_cancel() for failure processing between nla_nest_start() and nla_nest_end() kernel/sysctl_binary.c: use scnprintf() instead of snprintf() ...
2013-11-13Merge branch 'for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs updates from Al Viro: "All kinds of stuff this time around; some more notable parts: - RCU'd vfsmounts handling - new primitives for coredump handling - files_lock is gone - Bruce's delegations handling series - exportfs fixes plus misc stuff all over the place" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (101 commits) ecryptfs: ->f_op is never NULL locks: break delegations on any attribute modification locks: break delegations on link locks: break delegations on rename locks: helper functions for delegation breaking locks: break delegations on unlink namei: minor vfs_unlink cleanup locks: implement delegations locks: introduce new FL_DELEG lock flag vfs: take i_mutex on renamed file vfs: rename I_MUTEX_QUOTA now that it's not used for quotas vfs: don't use PARENT/CHILD lock classes for non-directories vfs: pull ext4's double-i_mutex-locking into common code exportfs: fix quadratic behavior in filehandle lookup exportfs: better variable name exportfs: move most of reconnect_path to helper function exportfs: eliminate unused "noprogress" counter exportfs: stop retrying once we race with rename/remove exportfs: clear DISCONNECTED on all parents sooner exportfs: more detailed comment for path_reconnect ...
2013-11-13mm/arch: use NUMA_NO_NODEJianguo Wu1-1/+1
Use more appropriate NUMA_NO_NODE instead of -1 in all archs' module_alloc() Signed-off-by: Jianguo Wu <wujianguo@huawei.com> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-11-12Merge branch 'irq-core-for-linus' of ↵Linus Torvalds1-31/+21
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull IRQ changes from Ingo Molnar: "The biggest change this cycle are the softirq/hardirq stack interaction and nesting fixes, cleanups and reorganizations from Frederic. This is the longer followup story to the softirq nesting fix that is already upstream (commit ded797547548: "irq: Force hardirq exit's softirq processing on its own stack")" * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: irqchip: bcm2835: Convert to use IRQCHIP_DECLARE macro powerpc: Tell about irq stack coverage x86: Tell about irq stack coverage irq: Optimize softirq stack selection in irq exit irq: Justify the various softirq stack choices irq: Improve a bit softirq debugging irq: Optimize call to softirq on hardirq exit irq: Consolidate do_softirq() arch overriden implementations x86/irq: Correct comment about i8259 initialization
2013-11-09constify copy_siginfo_to_user{,32}()Al Viro1-1/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-11-04s390/mm,tlb: correct tlb flush on page table upgradeMartin Schwidefsky2-2/+1
The IDTE instruction used to flush TLB entries for a specific address space uses the address-space-control element (ASCE) to identify affected TLB entries. The upgrade of a page table adds a new top level page table which changes the ASCE. The TLB entries associated with the old ASCE need to be flushed and the ASCE for the address space needs to be replaced synchronously on all CPUs which currently use it. The concept of a lazy ASCE update with an exception handler is broken. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-31s390/vtime: correct idle time calculationMartin Schwidefsky2-3/+3
Use the ACCESS_ONCE macro for both accesses to idle->sequence in the loops to calculate the idle time. If only one access uses the macro, the compiler is free to cache the value for the second access which can cause endless loops. Cc: stable@vger.kernel.org # 3.6+ Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-28s390: convert use of typedef ctl_table to struct ctl_tableJoe Perches1-1/+1
This typedef is unnecessary and should just be removed. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/compat: make psw32_user_bits a constant value againHeiko Carstens3-7/+3
Make psw32_user_bits a constant value again. This is a leftover of the code which allowed to run the kernel either in primary or home space which got removed with 9a905662 "s390/uaccess: always run the kernel in home space". Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390: fix handling of runtime instrumentation psw bitHeiko Carstens3-14/+32
Fix the following bugs: - When returning from a signal the signal handler copies the saved psw mask from user space and uses parts of it. Especially it restores the RI bit unconditionally. If however the machine doesn't support RI, or RI is disabled for the task, the last lpswe instruction which returns to user space will generate a specification exception. To fix this check if the RI bit is allowed to be set and kill the task if not. - In the compat mode signal handler code the RI bit of the psw mask gets propagated to the mask of the return psw: if user space enables RI in the signal handler, RI will also be enabled after the signal handler is finished. This is a different behaviour than with 64 bit tasks. So change this to match the 64 bit semantics, which restores the original RI bit value. - Fix similar oddities within the ptrace code as well. Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390: fix save and restore of the floating-point-control registerMartin Schwidefsky5-59/+75
The FPC_VALID_MASK has been used to check the validity of the value to be loaded into the floating-point-control register. With the introduction of the floating-point extension facility and the decimal-floating-point additional bits have been defined which need to be checked in a non straight forward way. So far these bits have been ignored which can cause an incorrect results for decimal- floating-point operations, e.g. an incorrect rounding mode to be set after signal return. The static check with the FPC_VALID_MASK is replaced with a trial load of the floating-point-control value, see test_fp_ctl. In addition an information leak with the padding word between the floating-point-control word and the floating-point registers in the s390_fp_regs is fixed. Reported-by: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/cache: get rid of compile warningHeiko Carstens1-3/+2
Get rid of this one: arch/s390/kernel/cache.c: In function 'cache_build_info': arch/s390/kernel/cache.c:144: warning: 'private' may be used uninitialized in this function Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/compat,signal: change return values to -EFAULTHeiko Carstens2-17/+19
Instead of returnin the number of bytes not copied and/or -EFAULT let the signal handler helper functions always return -EFAULT if a user space access failed. This doesn't fix a bug in the current code, but makes is harder to get it wrong in the future. Also "smatch" won't complain anymore about the fact that the number of remaining bytes gets returned instead of -EFAULT. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390: Remove zfcpdump NR_CPUS dependencyMichael Holzheu2-14/+31
Currently zfpcdump can only collect registers for up to CONFIG_NR_CPUS CPUss. This dependency is not necessary. So remove it by dynamically allocating the save area array. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/ftrace: prepare_ftrace_return() function call orderHeiko Carstens1-5/+4
Steven Rostedt noted that s390 is the only architecture which calls ftrace_push_return_trace() before ftrace_graph_entry() and therefore has the small advantage that trace.depth gets initialized automatically. However this small advantage isn't worth the difference and possible subtle breakage that may result from this. So change s390 to have the same function call order like all other architectures: first ftrace_graph_entry(), then ftrace_push_return_trace() Reported-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/crashdump: remove unused variableHeiko Carstens1-1/+0
Get rid of this compile warning: arch/s390/kernel/crash_dump.c: In function 'copy_from_realmem': arch/s390/kernel/crash_dump.c:48:6: warning: unused variable 'rc' [-Wunused-variable] int rc; ^ Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/mm: do not initialize storage keysMartin Schwidefsky1-0/+2
With dirty and referenced bits implemented in software it is unnecessary to initialize the storage key for every page. With this patch not a single storage key operation is done for a system that does not use KVM. For KVM set_pte_at/pgste_set_key will do the initialization for the guest view of the storage key when the mapping for the page is established in the host. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/uaccess: always run the kernel in home spaceMartin Schwidefsky10-75/+33
Simplify the uaccess code by removing the user_mode=home option. The kernel will now always run in the home space mode. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/bitops: use generic find bit functions / reimplement _left variantHeiko Carstens2-49/+1
Just like all other architectures we should use out-of-line find bit operations, since the inline variant bloat the size of the kernel image. And also like all other architecures we should only supply optimized variants of the __ffs, ffs, etc. primitives. Therefore this patch removes the inlined s390 find bit functions and uses the generic out-of-line variants instead. The optimization of the primitives follows with the next patch. With this patch also the functions find_first_bit_left() and find_next_bit_left() have been reimplemented, since logically, they are nothing else but a find_first_bit()/find_next_bit() implementation that use an inverted __fls() instead of __ffs(). Also the restriction that these functions only work on machines which support the "flogr" instruction is gone now. This reduces the size of the kernel image (defconfig, -march=z9-109) by 144,482 bytes. Alone the size of the function build_sched_domains() gets reduced from 7 KB to 3,5 KB. We also git rid of unused functions like find_first_bit_le()... Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/bitops: optimize set_bit() for constant valuesHeiko Carstens1-1/+1
Since zEC12 we have the interlocked-access facility 2 which allows to use the instructions ni/oi/xi to update a single byte in storage with compare-and-swap semantics. So change set_bit(), clear_bit() and change_bit() to generate such code instead of a compare-and-swap loop (or using the load-and-* instruction family), if possible. This reduces the text segment by yet another 8KB (defconfig). Alternatively the long displacement variants niy/oiy/xiy could have been used, but the extended displacement field is usually not needed and therefore would only increase the size of the text segment again. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/bitops: remove CONFIG_SMP / simplify non-atomic bitopsHeiko Carstens1-6/+0
Remove CONFIG_SMP from bitops code. This reduces the C code significantly but also generates better code for the SMP case. This means that for !CONFIG_SMP set_bit() and friends now also have compare and swap semantics (read: more code). However nobody really cares for !CONFIG_SMP and this is the trade-off to simplify the SMP code which we do care about. The non-atomic bitops like __set_bit() now generate also better code because the old code did not have a __builtin_contant_p() check for the CONFIG_SMP case and therefore always generated the inline assembly variant. However the inline assemblies for the non-atomic case now got completely removed since gcc can produce better code, which accesses less memory operands. test_bit() got also a bit simplified since it did have a __builtin_constant_p() check, however two identical code pathes for each case (written differently). In result this mainly reduces the to be maintained code but is not very relevant for code generation, since there are not many non-atomic bitops usages that we care about. (code reduction defconfig kernel image before/after: 560 bytes). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/kprobes: allow kprobes only on known instructionsHeiko Carstens2-1/+3
Since we have an in-kernel disassembler we can make sure that there won't be any kprobes set on random data. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/kprobes: use insn_length helper functionHeiko Carstens1-4/+5
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/dis: move disassembler function prototypes to proper header fileHeiko Carstens1-0/+1
Now that the in-kernel disassembler has an own header file move the disassembler related function prototypes to that header file. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/dis: move common definitions to a header fileSuzuki K. Poulose1-28/+1
The patch moves some of the definitions to a header file. No functional changes involved. I have retained the Copyright Statement from the original file. Signed-off-by: Suzuki K Poulose <suzuki@in.ibm.com> [Heiko Carstens: rename s390-dis.h to dis.h] Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/dis: rename structures for unique typesSuzuki K. Poulose1-28/+28
Rename 'insn' and 'operand' structures to more canonical names to avoid conflicts. struct insn represents information about an instruction, including the mnemonics, format and opcode. struct operand represents the 'properties' and information on howto interpret the operand value and doesn't contain the value. We rename these structures for avoiding a global conflict. i.e, 1,$s/struct insn/struct s390_insn/g 1,$s/struct operand/struct s390_operand/g Signed-off-by: Suzuki K Poulose <suzuki@in.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/kprobes: have more correct if statement in s390_get_insn_slot()Heiko Carstens1-1/+1
When checking the insn address wether it is a kernel image or module address it should be an if-else-if statement not two independent if statements. This doesn't really fix a bug, but matches s390_free_insn_slot(). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-22s390/time: correct use of store clock fastMartin Schwidefsky1-1/+1
The result of the store-clock-fast (STCKF) instruction is a bit fuzzy. It can happen that the value stored on one CPU is smaller than the value stored on another CPU, although the order of the stores is the other way around. This can cause deltas of get_tod_clock() values to become negative when they should not be. We need to be more careful with store-clock-fast, this patch partially reverts git commit e4b7b4238e666682555461fa52eecd74652f36bb "time: always use stckf instead of stck if available". The get_tod_clock() function now uses the store-clock-extended (STCKE) instruction. get_tod_clock_fast() can be used if the fuzziness of store-clock-fast is acceptable e.g. for wait loops local to a CPU. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-15s390/compat,signal: fix return value of copy_siginfo_(to|from)_user32()Heiko Carstens1-2/+2
The return value of copy_siginfo_(to|from)_user32() gets passed to user space, however we do not convert a positive return value from copy_(to|from)_user to -EFAULT. Therefore these functions (and the calling system calls) my incorrectly return a positive number (bytes not copied) instead of -EFAULT. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-01irq: Consolidate do_softirq() arch overriden implementationsFrederic Weisbecker1-31/+21
All arch overriden implementations of do_softirq() share the following common code: disable irqs (to avoid races with the pending check), check if there are softirqs pending, then execute __do_softirq() on a specific stack. Consolidate the common parts such that archs only worry about the stack switch. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@au1.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Mackerras <paulus@au1.ibm.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: James E.J. Bottomley <jejb@parisc-linux.org> Cc: Helge Deller <deller@gmx.de> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: David S. Miller <davem@davemloft.net> Cc: Andrew Morton <akpm@linux-foundation.org>
2013-09-30s390: fix system call restart after inferior callMartin Schwidefsky2-0/+2
Git commit 616498813b11ffef "s390: system call path micro optimization" introduced a regression in regard to system call restarting and inferior function calls via the ptrace interface. The pointer to the system call table needs to be loaded in sysc_sigpending if do_signal returns with TIF_SYSCALl set after it restored a system call context. Cc: stable@vger.kernel.org # 3.10+ Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-09-30s390: Allow vmalloc target buffers for copy_from_oldmem()Michael Holzheu1-22/+20
Currently copy_from_oldmem() is not able to copy to virtual memory. When using kexec pre-allocated ELF header, copy_from_oldmem() is used to copy the ELF notes information to vmalloc buffers. So fix this and use the new function copy_from_realmem() that allows copying also to vmalloc memory. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-09-30s390/kprobes: add exrl to list of prohibited opcodesHeiko Carstens1-1/+5
"execute relative long" may have all sorts of side effects dependend on the instructions it executes. Therefore prohibit setting a kprobe on exrl just like we do for the regular execute instruction. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-09-11s390/vmcore: use vmcore for zfcpdumpMichael Holzheu1-18/+104
Modify the s390 copy_oldmem_page() and remap_oldmem_pfn_range() function for zfcpdump to read from the HSA memory if memory below HSA_SIZE bytes is requested. Otherwise real memory is used. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> Cc: Jan Willeke <willeke@de.ibm.com> Cc: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11s390/vmcore: implement remap_oldmem_pfn_range for s390Jan Willeke1-0/+26
Introduce the s390 specific way to map pages from oldmem. The memory area below OLDMEM_SIZE is mapped with offset OLDMEM_BASE. The other old memory is mapped directly. Signed-off-by: Jan Willeke <willeke@de.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> Cc: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11s390/vmcore: use ELF header in new memory featureMichael Holzheu1-27/+54
Exchange the old relocate mechanism with the new arch function call override mechanism that allows to create the ELF core header in the 2nd kernel. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> Cc: Jan Willeke <willeke@de.ibm.com> Cc: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11s390/kprobes: add support for pc-relative long displacement instructionsHeiko Carstens1-7/+137
With the general-instruction extension facility (z10) a couple of instructions with a pc-relative long displacement were introduced. The kprobes support for these instructions however was never implemented. In result, if anybody ever put a probe on any of these instructions the result would have been random behaviour after the instruction got executed within the insn slot. So lets add the missing handling for these instructions. Since all of the new instructions have 32 bit signed displacement the easiest solution is to allocate an insn slot that is within the same 2GB area like the original instruction and patch the displacement field. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11Merge branch 'for-linus' of ↵Linus Torvalds12-96/+69
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull more s390 updates from Heiko Carstens: "This includes one bpf/jit bug fix where the jit compiler could sometimes write generated code out of bounds of the allocated memory area. The rest of the patches are only cleanups and minor improvements" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/irq: reduce size of external interrupt handler hash array s390/compat,uid16: use current_cred() s390/ap_bus: use and-mask instead of a cast s390/ftrace: avoid pointer arithmetics with function pointers s390: make various functions static, add declarations to header files s390/compat signal: add couple of __force annotations s390/mm: add __releases()/__acquires() annotations to gmap_alloc_table() s390: keep Kconfig sorted s390/irq: rework irq subclass handling s390/irq: use hlists for external interrupt handler array s390/dumpstack: convert print_symbol to %pSR s390/perf: Remove print_hex_dump_bytes() debug output s390: update defconfig s390/bpf,jit: fix address randomization
2013-09-09s390/irq: reduce size of external interrupt handler hash arrayHeiko Carstens1-2/+4
Change the hash algorithm a bit so it produces only values in the range of 0..31. This allows to reduce the size of the external interrupt handler hash array even further while making sure that each of the known interrupt sources keeps its unique hash with the slightly modified algorithm: 0x1004 --> 12 0x1201 --> 10 0x1202 --> 11 0x1406 --> 16 0x1407 --> 17 0x2401 --> 19 0x2603 --> 22 0x4000 --> 0 This also means that the entire array now fits into exactly one cache line; so add a proper align statement as well. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-07s390/compat,uid16: use current_cred()Heiko Carstens1-4/+5
86a264ab "CRED: Wrap current->cred and a few other accessors" converted all uses of current->cred into current_cred() but left s390 alone. So let's convert s390 finally as well, only five years later. This way we also get rid of a sparse warning which complains about a possible invalid rcu dereference which however is a false positive. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-07s390/ftrace: avoid pointer arithmetics with function pointersHeiko Carstens1-2/+2
Pointer arithmetics with function pointers is not really defined, but seems to do the right thing. Let's cast to a void pointer to have a defined behaviour, at least when using gcc. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-07s390: make various functions static, add declarations to header filesHeiko Carstens6-15/+11
Make various functions static, add declarations to header files to fix a couple of sparse findings. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-07s390/compat signal: add couple of __force annotationsHeiko Carstens1-5/+5
Add __force annotations to get rid of a couple of sparse warnings: arch/s390/kernel/compat_signal.c:335:35: warning: cast removes address space of expression Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-04Merge branch 'timers-nohz-for-linus' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timers/nohz changes from Ingo Molnar: "It mostly contains fixes and full dynticks off-case optimizations, by Frederic Weisbecker" * 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits) nohz: Include local CPU in full dynticks global kick nohz: Optimize full dynticks's sched hooks with static keys nohz: Optimize full dynticks state checks with static keys nohz: Rename a few state variables vtime: Always debug check snapshot source _before_ updating it vtime: Always scale generic vtime accounting results vtime: Optimize full dynticks accounting off case with static keys vtime: Describe overriden functions in dedicated arch headers m68k: hardirq_count() only need preempt_mask.h hardirq: Split preempt count mask definitions context_tracking: Split low level state headers vtime: Fix racy cputime delta update vtime: Remove a few unneeded generic vtime state checks context_tracking: User/kernel broundary cross trace events context_tracking: Optimize context switch off case with static keys context_tracking: Optimize guest APIs off case with static key context_tracking: Optimize main APIs off case with static key context_tracking: Ground setup for static key use context_tracking: Remove full dynticks' hacky dependency on wide context tracking nohz: Only enable context tracking on full dynticks CPUs ...
2013-09-04s390/irq: rework irq subclass handlingHeiko Carstens3-43/+20
Let's not add a function for every external interrupt subclass for which we need reference counting. Just have two register/unregister functions which have a subclass parameter: void irq_subclass_register(enum irq_subclass subclass); void irq_subclass_unregister(enum irq_subclass subclass); Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-04s390/irq: use hlists for external interrupt handler arrayHeiko Carstens1-12/+12
Use hlists for the hashed array of external interrupt handlers. Reduces the size of the array by 50% (2KB). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-04s390/dumpstack: convert print_symbol to %pSRHeiko Carstens1-10/+10
This is the same as what other architectures did. The change has also the advantage that there won't be any interleaving messages between printk() and print_symbol(). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-04s390/perf: Remove print_hex_dump_bytes() debug outputHendrik Brueckner1-4/+1
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-08-30s390/pci: update function handle after resume from hibernateSebastian Ott1-0/+2
Function handles may change while the system was in hibernation use list pci functions and update the function handles. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-30s390/hibernate: add early resume functionSebastian Ott2-5/+11
Some functions that do arch specific resume actions are called directly from swsusp_asm64.S . Before we add another function call provide a generic s390_early_resume function which can be used for this purpose. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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