18 Nov, 2017
1 commit
-
Pull Kbuild updates from Masahiro Yamada:
"One of the most remarkable improvements in this cycle is, Kbuild is
now able to cache the result of shell commands. Some variables are
expensive to compute, for example, $(call cc-option,...) invokes the
compiler. It is not efficient to redo this computation every time,
even when we are not actually building anything. Kbuild creates a
hidden file ".cache.mk" that contains invoked shell commands and their
results. The speed-up should be noticeable.Summary:
- Fix arch build issues (hexagon, sh)
- Clean up various Makefiles and scripts
- Fix wrong usage of {CFLAGS,LDFLAGS}_MODULE in arch Makefiles
- Cache variables that are expensive to compute
- Improve cc-ldopton and ld-option for Clang
- Optimize output directory creation"
* tag 'kbuild-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (30 commits)
kbuild: move coccicheck help from scripts/Makefile.help to top Makefile
sh: decompressor: add shipped files to .gitignore
frv: .gitignore: ignore vmlinux.lds
selinux: remove unnecessary assignment to subdir-
kbuild: specify FORCE in Makefile.headersinst as .PHONY target
kbuild: remove redundant mkdir from ./Kbuild
kbuild: optimize object directory creation for incremental build
kbuild: create object directories simpler and faster
kbuild: filter-out PHONY targets from "targets"
kbuild: remove redundant $(wildcard ...) for cmd_files calculation
kbuild: create directory for make cache only when necessary
sh: select KBUILD_DEFCONFIG depending on ARCH
kbuild: fix linker feature test macros when cross compiling with Clang
kbuild: shrink .cache.mk when it exceeds 1000 lines
kbuild: do not call cc-option before KBUILD_CFLAGS initialization
kbuild: Cache a few more calls to the compiler
kbuild: Add a cache for generated variables
kbuild: add forward declaration of default target to Makefile.asm-generic
kbuild: remove KBUILD_SUBDIR_ASFLAGS and KBUILD_SUBDIR_CCFLAGS
hexagon/kbuild: replace CFLAGS_MODULE with KBUILD_CFLAGS_MODULE
...
16 Nov, 2017
1 commit
-
Signed-off-by: Masahiro Yamada
02 Nov, 2017
1 commit
-
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.By default all files without license information are under the default
license of the kernel, which is GPL version 2.Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if
Reviewed-by: Philippe Ombredanne
Reviewed-by: Thomas Gleixner
Signed-off-by: Greg Kroah-Hartman
26 Aug, 2017
1 commit
-
There is code duplicated over all architecture's headers for
futex_atomic_op_inuser. Namely op decoding, access_ok check for uaddr,
and comparison of the result.Remove this duplication and leave up to the arches only the needed
assembly which is now in arch_futex_atomic_op_inuser.This effectively distributes the Will Deacon's arm64 fix for undefined
behaviour reported by UBSAN to all architectures. The fix was done in
commit 5f16a046f8e1 (arm64: futex: Fix undefined behaviour with
FUTEX_OP_OPARG_SHIFT usage). Look there for an example dump.And as suggested by Thomas, check for negative oparg too, because it was
also reported to cause undefined behaviour report.Note that s390 removed access_ok check in d12a29703 ("s390/uaccess:
remove pointless access_ok() checks") as access_ok there returns true.
We introduce it back to the helper for the sake of simplicity (it gets
optimized away anyway).Signed-off-by: Jiri Slaby
Signed-off-by: Thomas Gleixner
Acked-by: Russell King
Acked-by: Michael Ellerman (powerpc)
Acked-by: Heiko Carstens [s390]
Acked-by: Chris Metcalf [for tile]
Reviewed-by: Darren Hart (VMware)
Reviewed-by: Will Deacon [core/arm64]
Cc: linux-mips@linux-mips.org
Cc: Rich Felker
Cc: linux-ia64@vger.kernel.org
Cc: linux-sh@vger.kernel.org
Cc: peterz@infradead.org
Cc: Benjamin Herrenschmidt
Cc: Max Filippov
Cc: Paul Mackerras
Cc: sparclinux@vger.kernel.org
Cc: Jonas Bonn
Cc: linux-s390@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: Yoshinori Sato
Cc: linux-hexagon@vger.kernel.org
Cc: Helge Deller
Cc: "James E.J. Bottomley"
Cc: Catalin Marinas
Cc: Matt Turner
Cc: linux-snps-arc@lists.infradead.org
Cc: Fenghua Yu
Cc: Arnd Bergmann
Cc: linux-xtensa@linux-xtensa.org
Cc: Stefan Kristiansson
Cc: openrisc@lists.librecores.org
Cc: Ivan Kokshaysky
Cc: Stafford Horne
Cc: linux-arm-kernel@lists.infradead.org
Cc: Richard Henderson
Cc: Chris Zankel
Cc: Michal Simek
Cc: Tony Luck
Cc: linux-parisc@vger.kernel.org
Cc: Vineet Gupta
Cc: Ralf Baechle
Cc: Richard Kuo
Cc: linux-alpha@vger.kernel.org
Cc: Martin Schwidefsky
Cc: linuxppc-dev@lists.ozlabs.org
Cc: "David S. Miller"
Link: http://lkml.kernel.org/r/20170824073105.3901-1-jslaby@suse.cz
29 Jun, 2017
1 commit
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The only user of thread_saved_pc() in non-arch-specific code was removed
in commit 8243d5597793 ("sched/core: Remove pointless printout in
sched_show_task()"). Remove the implementations as well.Some architectures use thread_saved_pc() in their arch-specific code.
Leave their thread_saved_pc() intact.Signed-off-by: Tobias Klauser
Acked-by: Geert Uytterhoeven
Cc: Ingo Molnar
Signed-off-by: Linus Torvalds
11 May, 2017
1 commit
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Pull Kbuild updates from Masahiro Yamada:
- improve Clang support
- clean up various Makefiles
- improve build log visibility (objtool, alpha, ia64)
- improve compiler flag evaluation for better build performance
- fix GCC version-dependent warning
- fix genksyms
* tag 'kbuild-v4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (23 commits)
kbuild: dtbinst: remove unnecessary __dtbs_install_prep target
ia64: beatify build log for gate.so and gate-syms.o
alpha: make short build log available for division routines
alpha: merge build rules of division routines
alpha: add $(src)/ rather than $(obj)/ to make source file path
Makefile: evaluate LDFLAGS_BUILD_ID only once
objtool: make it visible in make V=1 output
kbuild: clang: add -no-integrated-as to KBUILD_[AC]FLAGS
kbuild: Add support to generate LLVM assembly files
kbuild: Add better clang cross build support
kbuild: drop -Wno-unknown-warning-option from clang options
kbuild: fix asm-offset generation to work with clang
kbuild: consolidate redundant sed script ASM offset generation
frv: Use OFFSET macro in DEF_*REG()
kbuild: avoid conflict between -ffunction-sections and -pg on gcc-4.7
kbuild: Consolidate header generation from ASM offset information
kbuild: use -Oz instead of -Os when using clang
kbuild, LLVMLinux: Add -Werror to cc-option to support clang
Kbuild: make designated_init attribute fatal
kbuild: drop unneeded patterns '.*.orig' and '.*.rej' from distclean
...
02 May, 2017
1 commit
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Pull x86 asm updates from Ingo Molnar:
"The main changes in this cycle were:- unwinder fixes and enhancements
- improve ftrace interaction with the unwinder
- optimize the code footprint of WARN() and related debugging
constructs- ... plus misc updates, cleanups and fixes"
* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits)
x86/unwind: Dump all stacks in unwind_dump()
x86/unwind: Silence more entry-code related warnings
x86/ftrace: Fix ebp in ftrace_regs_caller that screws up unwinder
x86/unwind: Remove unused 'sp' parameter in unwind_dump()
x86/unwind: Prepend hex mask value with '0x' in unwind_dump()
x86/unwind: Properly zero-pad 32-bit values in unwind_dump()
x86/unwind: Ensure stack pointer is aligned
debug: Avoid setting BUGFLAG_WARNING twice
x86/unwind: Silence entry-related warnings
x86/unwind: Read stack return address in update_stack_state()
x86/unwind: Move common code into update_stack_state()
debug: Fix __bug_table[] in arch linker scripts
debug: Add _ONCE() logic to report_bug()
x86/debug: Define BUG() again for !CONFIG_BUG
x86/debug: Implement __WARN() using UD0
x86/ftrace: Use Makefile logic instead of #ifdef for compiling ftrace_*.o
x86/ftrace: Add -mfentry support to x86_32 with DYNAMIC_FTRACE set
x86/ftrace: Clean up ftrace_regs_caller
x86/ftrace: Add stack frame pointer to ftrace_caller
x86/ftrace: Move the ftrace specific code out of entry_32.S
...
19 Apr, 2017
1 commit
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Avoid code duplication by using OFFSET() in DEF_*REG() instead of
replicating the macro.Signed-off-by: Matthias Kaehlcke
Reviewed-by: David Howells
Signed-off-by: Masahiro Yamada
03 Apr, 2017
1 commit
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The kbuild test robot reported this build failure on a number
of architectures:> make.cross ARCH=arm
> lib/lib.a(bug.o): In function `find_bug':
> >> lib/bug.c:135: undefined reference to `__start___bug_table'
> >> lib/bug.c:135: undefined reference to `__stop___bug_table'Caused by:
19d436268dde ("debug: Add _ONCE() logic to report_bug()")
Which moved the BUG_TABLE from RO_DATA_SECTION() to RW_DATA_SECTION(),
but a number of architectures don't use RW_DATA_SECTION(), so they
ended up with no __bug_table[] ...Ideally all those would use RW_DATA_SECTION() in their linker scripts,
but that's for another day.Signed-off-by: Peter Zijlstra
Cc: Linus Torvalds
Cc: Thomas Gleixner
Cc: kbuild test robot
Cc: kbuild-all@01.org
Cc: tipbuild@zytor.com
Link: http://lkml.kernel.org/r/20170330154927.o6qmgfp4bdhrajbm@hirez.programming.kicks-ass.net
Signed-off-by: Ingo Molnar
29 Mar, 2017
1 commit
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Massage frv search_exception_table() to
a) taking pt_regs pointer as explicit argument
b) updating ->pc on success
Simplifies callers a bit and allows to convert to generic extable.h,
while we are at it.Signed-off-by: Al Viro
02 Mar, 2017
4 commits
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We are going to split out of , which
will have to be picked up from other headers and a couple of .c files.Create a trivial placeholder file that just
maps to to make this patch obviously correct and
bisectable.Include the new header in the files that are going to need it.
Acked-by: Linus Torvalds
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar -
We are going to split out of , which
will have to be picked up from other headers and a couple of .c files.Create a trivial placeholder file that just
maps to to make this patch obviously correct and
bisectable.Include the new header in the files that are going to need it.
Acked-by: Linus Torvalds
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar -
We are going to split out of , which
will have to be picked up from other headers and a couple of .c files.Create a trivial placeholder file that just
maps to to make this patch obviously correct and
bisectable.Include the new header in the files that are going to need it.
Acked-by: Linus Torvalds
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar -
We are going to split out of , which
will have to be picked up from other headers and a couple of .c files.Create a trivial placeholder file that just
maps to to make this patch obviously correct and
bisectable.Include the new header in the files that are going to need it.
Acked-by: Linus Torvalds
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar
25 Dec, 2016
1 commit
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This was entirely automated, using the script by Al:
PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*'
sed -i -e "s!$PATT!#include !" \
$(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h)to do the replacement at the end of the merge window.
Requested-by: Al Viro
Signed-off-by: Linus Torvalds
08 Oct, 2016
1 commit
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When doing an nmi backtrace of many cores, most of which are idle, the
output is a little overwhelming and very uninformative. Suppress
messages for cpus that are idling when they are interrupted and just
emit one line, "NMI backtrace for N skipped: idling at pc 0xNNN".We do this by grouping all the cpuidle code together into a new
.cpuidle.text section, and then checking the address of the interrupted
PC to see if it lies within that section.This commit suitably tags x86 and tile idle routines, and only adds in
the minimal framework for other architectures.Link: http://lkml.kernel.org/r/1472487169-14923-5-git-send-email-cmetcalf@mellanox.com
Signed-off-by: Chris Metcalf
Acked-by: Peter Zijlstra (Intel)
Tested-by: Peter Zijlstra (Intel)
Tested-by: Daniel Thompson [arm]
Tested-by: Petr Mladek
Cc: Aaron Tomlin
Cc: Peter Zijlstra (Intel)
Cc: "Rafael J. Wysocki"
Cc: Russell King
Cc: Thomas Gleixner
Cc: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
27 Jul, 2015
1 commit
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Mostly complete rewrite of the FRV atomic implementation, instead of
using assembly files, use inline assembler.The out-of-line CONFIG option makes a bit of a mess of things, but a
little CPP trickery gets that done too.FRV already had the atomic logic ops but under a non standard name,
the reimplementation provides the generic names and provides the
intermediate form required for the bitops implementation.The slightly inconsistent __atomic32_fetch_##op naming is because
__atomic_fetch_##op conlicts with GCC builtin functions.The 64bit atomic ops use the inline assembly %Ln construct to access
the low word register (r+1), afaik this construct was not previously
used in the kernel and is completely undocumented, but I found it in
the FRV GCC code and it seems to work.FRV had a non-standard definition of atomic_{clear,set}_mask() which
would work types other than atomic_t, the one user relying on that
(arch/frv/kernel/dma.c) got converted to use the new intermediate
form.Signed-off-by: Peter Zijlstra (Intel)
Signed-off-by: Thomas Gleixner
16 Apr, 2015
1 commit
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Pull exec domain removal from Richard Weinberger:
"This series removes execution domain support from Linux.The idea behind exec domains was to support different ABIs. The
feature was never complete nor stable. Let's rip it out and make the
kernel signal handling code less complicated"* 'exec_domain_rip_v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc: (27 commits)
arm64: Removed unused variable
sparc: Fix execution domain removal
Remove rest of exec domains.
arch: Remove exec_domain from remaining archs
arc: Remove signal translation and exec_domain
xtensa: Remove signal translation and exec_domain
xtensa: Autogenerate offsets in struct thread_info
x86: Remove signal translation and exec_domain
unicore32: Remove signal translation and exec_domain
um: Remove signal translation and exec_domain
tile: Remove signal translation and exec_domain
sparc: Remove signal translation and exec_domain
sh: Remove signal translation and exec_domain
s390: Remove signal translation and exec_domain
mn10300: Remove signal translation and exec_domain
microblaze: Remove signal translation and exec_domain
m68k: Remove signal translation and exec_domain
m32r: Remove signal translation and exec_domain
m32r: Autogenerate offsets in struct thread_info
frv: Remove signal translation and exec_domain
...
13 Apr, 2015
1 commit
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As execution domain support is gone we can remove
signal translation from the signal code and remove
exec_domain from thread_info.Signed-off-by: Richard Weinberger
12 Apr, 2015
1 commit
-
Signed-off-by: Al Viro
13 Feb, 2015
1 commit
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If an attacker can cause a controlled kernel stack overflow, overwriting
the restart block is a very juicy exploit target. This is because the
restart_block is held in the same memory allocation as the kernel stack.Moving the restart block to struct task_struct prevents this exploit by
making the restart_block harder to locate.Note that there are other fields in thread_info that are also easy
targets, at least on some architectures.It's also a decent simplification, since the restart code is more or less
identical on all architectures.[james.hogan@imgtec.com: metag: align thread_info::supervisor_stack]
Signed-off-by: Andy Lutomirski
Cc: Thomas Gleixner
Cc: Al Viro
Cc: "H. Peter Anvin"
Cc: Ingo Molnar
Cc: Kees Cook
Cc: David Miller
Acked-by: Richard Weinberger
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Matt Turner
Cc: Vineet Gupta
Cc: Russell King
Cc: Catalin Marinas
Cc: Will Deacon
Cc: Haavard Skinnemoen
Cc: Hans-Christian Egtvedt
Cc: Steven Miao
Cc: Mark Salter
Cc: Aurelien Jacquiot
Cc: Mikael Starvik
Cc: Jesper Nilsson
Cc: David Howells
Cc: Richard Kuo
Cc: "Luck, Tony"
Cc: Geert Uytterhoeven
Cc: Michal Simek
Cc: Ralf Baechle
Cc: Jonas Bonn
Cc: "James E.J. Bottomley"
Cc: Helge Deller
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Acked-by: Michael Ellerman (powerpc)
Tested-by: Michael Ellerman (powerpc)
Cc: Martin Schwidefsky
Cc: Heiko Carstens
Cc: Chen Liqin
Cc: Lennox Wu
Cc: Chris Metcalf
Cc: Guan Xuetao
Cc: Chris Zankel
Cc: Max Filippov
Cc: Oleg Nesterov
Cc: Guenter Roeck
Signed-off-by: James Hogan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
10 Oct, 2014
2 commits
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Remove the IRQF_DISABLED flag from FRV architecture code. It's a NOOP
since 2.6.35 and it will be removed one day.Signed-off-by: Michael Opdenacker
Cc: David Howells
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Frv has a macro named cpu_data, interfering with variables and struct
members with the same name:include/linux/pm_domain.h:75:24: error: expected identifier or '('
before '&' token
struct gpd_cpu_data *cpu_data;As struct cpuinfo_frv, boot_cpu_data, cpu_data, and current_cpu_data are
not used, removed them to fix this.Signed-off-by: Geert Uytterhoeven
Reported-by: kbuild test robot
Cc: David Howells
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
06 Aug, 2014
2 commits
-
Use sigsp() instead of the open coded variant.
Signed-off-by: Richard Weinberger
-
Use the more generic functions get_signal() signal_setup_done()
for signal delivery.Signed-off-by: Richard Weinberger
15 Jul, 2013
1 commit
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The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications. For example, the fix in
commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out. Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.Note that some harmless section mismatch warnings may result, since
notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
are flagged as __cpuinit -- so if we remove the __cpuinit from
arch specific callers, we will also get section mismatch warnings.
As an intermediate step, we intend to turn the linux/init.h cpuinit
content into no-ops as early as possible, since that will get rid
of these warnings. In any case, they are temporary and harmless.This removes all the arch/frv uses of the __cpuinit macros from
all C files. Currently frv does not have any __CPUINIT used in
assembly files.[1] https://lkml.org/lkml/2013/5/20/589
Cc: David Howells
Signed-off-by: Paul Gortmaker
05 Jul, 2013
1 commit
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Pull trivial tree updates from Jiri Kosina:
"The usual stuff from trivial tree"* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (34 commits)
treewide: relase -> release
Documentation/cgroups/memory.txt: fix stat file documentation
sysctl/net.txt: delete reference to obsolete 2.4.x kernel
spinlock_api_smp.h: fix preprocessor comments
treewide: Fix typo in printk
doc: device tree: clarify stuff in usage-model.txt.
open firmware: "/aliasas" -> "/aliases"
md: bcache: Fixed a typo with the word 'arithmetic'
irq/generic-chip: fix a few kernel-doc entries
frv: Convert use of typedef ctl_table to struct ctl_table
sgi: xpc: Convert use of typedef ctl_table to struct ctl_table
doc: clk: Fix incorrect wording
Documentation/arm/IXP4xx fix a typo
Documentation/networking/ieee802154 fix a typo
Documentation/DocBook/media/v4l fix a typo
Documentation/video4linux/si476x.txt fix a typo
Documentation/virtual/kvm/api.txt fix a typo
Documentation/early-userspace/README fix a typo
Documentation/video4linux/soc-camera.txt fix a typo
lguest: fix CONFIG_PAE -> CONFIG_x86_PAE in comment
...
04 Jul, 2013
4 commits
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Merge first patch-bomb from Andrew Morton:
- various misc bits
- I'm been patchmonkeying ocfs2 for a while, as Joel and Mark have been
distracted. There has been quite a bit of activity.
- About half the MM queue
- Some backlight bits
- Various lib/ updates
- checkpatch updates
- zillions more little rtc patches
- ptrace
- signals
- exec
- procfs
- rapidio
- nbd
- aoe
- pps
- memstick
- tools/testing/selftests updates* emailed patches from Andrew Morton : (445 commits)
tools/testing/selftests: don't assume the x bit is set on scripts
selftests: add .gitignore for kcmp
selftests: fix clean target in kcmp Makefile
selftests: add .gitignore for vm
selftests: add hugetlbfstest
self-test: fix make clean
selftests: exit 1 on failure
kernel/resource.c: remove the unneeded assignment in function __find_resource
aio: fix wrong comment in aio_complete()
drivers/w1/slaves/w1_ds2408.c: add magic sequence to disable P0 test mode
drivers/memstick/host/r592.c: convert to module_pci_driver
drivers/memstick/host/jmb38x_ms: convert to module_pci_driver
pps-gpio: add device-tree binding and support
drivers/pps/clients/pps-gpio.c: convert to module_platform_driver
drivers/pps/clients/pps-gpio.c: convert to devm_* helpers
drivers/parport/share.c: use kzalloc
Documentation/accounting/getdelays.c: avoid strncpy in accounting tool
aoe: update internal version number to v83
aoe: update copyright date
aoe: perform I/O completions in parallel
... -
'cmdline' is a NUL terminated string, when its length < 4, memcmp()
will cause memory access out of boundary.So use strncmp() instead of memcmp().
Signed-off-by: Chen Gang
Cc: David Howells
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Since die_if_kernel() is an extern common used function, better always
check the buffer length to avoid memory overflow by a long 'str'.Signed-off-by: Chen Gang
Cc: David Howells
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Prepare for removing num_physpages and simplify mem_init().
Signed-off-by: Jiang Liu
Cc: David Howells
Cc: Andi Kleen
Cc: Geert Uytterhoeven
Cc: Greg Kroah-Hartman
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
16 Jun, 2013
1 commit
-
The commented-out calls to processor_init() and unit_init() seem to have
been copied from mn10300, when starting the frv port. Remove them.Signed-off-by: Geert Uytterhoeven
14 Jun, 2013
1 commit
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This typedef is unnecessary and should just be removed.
Signed-off-by: Joe Perches
Acked-by: David Howells
Signed-off-by: Jiri Kosina
01 May, 2013
2 commits
-
show_regs() is inherently arch-dependent but it does make sense to print
generic debug information and some archs already do albeit in slightly
different forms. This patch introduces a generic function to print debug
information from show_regs() so that different archs print out the same
information and it's much easier to modify what's printed.show_regs_print_info() prints out the same debug info as dump_stack()
does plus task and thread_info pointers.* Archs which didn't print debug info now do.
alpha, arc, blackfin, c6x, cris, frv, h8300, hexagon, ia64, m32r,
metag, microblaze, mn10300, openrisc, parisc, score, sh64, sparc,
um, xtensa* Already prints debug info. Replaced with show_regs_print_info().
The printed information is superset of what used to be there.arm, arm64, avr32, mips, powerpc, sh32, tile, unicore32, x86
* s390 is special in that it used to print arch-specific information
along with generic debug info. Heiko and Martin think that the
arch-specific extra isn't worth keeping s390 specfic implementation.
Converted to use the generic version.Note that now all archs print the debug info before actual register
dumps.An example BUG() dump follows.
kernel BUG at /work/os/work/kernel/workqueue.c:4841!
invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.9.0-rc1-work+ #7
Hardware name: empty empty/S3992, BIOS 080011 10/26/2007
task: ffff88007c85e040 ti: ffff88007c860000 task.ti: ffff88007c860000
RIP: 0010:[] [] init_workqueues+0x4/0x6
RSP: 0000:ffff88007c861ec8 EFLAGS: 00010246
RAX: ffff88007c861fd8 RBX: ffffffff824466a8 RCX: 0000000000000001
RDX: 0000000000000046 RSI: 0000000000000001 RDI: ffffffff8234a07a
RBP: ffff88007c861ec8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8234a07a
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88007dc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff88015f7ff000 CR3: 00000000021f1000 CR4: 00000000000007f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Stack:
ffff88007c861ef8 ffffffff81000312 ffffffff824466a8 ffff88007c85e650
0000000000000003 0000000000000000 ffff88007c861f38 ffffffff82335e5d
ffff88007c862080 ffffffff8223d8c0 ffff88007c862080 ffffffff81c47760
Call Trace:
[] do_one_initcall+0x122/0x170
[] kernel_init_freeable+0x9b/0x1c8
[] ? rest_init+0x140/0x140
[] kernel_init+0xe/0xf0
[] ret_from_fork+0x7c/0xb0
[] ? rest_init+0x140/0x140
...v2: Typo fix in x86-32.
v3: CPU number dropped from show_regs_print_info() as
dump_stack_print_info() has been updated to print it. s390
specific implementation dropped as requested by s390 maintainers.Signed-off-by: Tejun Heo
Acked-by: David S. Miller
Acked-by: Jesper Nilsson
Cc: Heiko Carstens
Cc: Martin Schwidefsky
Cc: Bjorn Helgaas
Cc: Fengguang Wu
Cc: Mike Frysinger
Cc: Vineet Gupta
Cc: Sam Ravnborg
Acked-by: Chris Metcalf [tile bits]
Acked-by: Richard Kuo [hexagon bits]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Both dump_stack() and show_stack() are currently implemented by each
architecture. show_stack(NULL, NULL) dumps the backtrace for the
current task as does dump_stack(). On some archs, dump_stack() prints
extra information - pid, utsname and so on - in addition to the
backtrace while the two are identical on other archs.The usages in arch-independent code of the two functions indicate
show_stack(NULL, NULL) should print out bare backtrace while
dump_stack() is used for debugging purposes when something went wrong,
so it does make sense to print additional information on the task which
triggered dump_stack().There's no reason to require archs to implement two separate but mostly
identical functions. It leads to unnecessary subtle information.This patch expands the dummy fallback dump_stack() implementation in
lib/dump_stack.c such that it prints out debug information (taken from
x86) and invokes show_stack(NULL, NULL) and drops arch-specific
dump_stack() implementations in all archs except blackfin. Blackfin's
dump_stack() does something wonky that I don't understand.Debug information can be printed separately by calling
dump_stack_print_info() so that arch-specific dump_stack()
implementation can still emit the same debug information. This is used
in blackfin.This patch brings the following behavior changes.
* On some archs, an extra level in backtrace for show_stack() could be
printed. This is because the top frame was determined in
dump_stack() on those archs while generic dump_stack() can't do that
reliably. It can be compensated by inlining dump_stack() but not
sure whether that'd be necessary.* Most archs didn't use to print debug info on dump_stack(). They do
now.An example WARN dump follows.
WARNING: at kernel/workqueue.c:4841 init_workqueues+0x35/0x505()
Hardware name: empty
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.9.0-rc1-work+ #9
0000000000000009 ffff88007c861e08 ffffffff81c614dc ffff88007c861e48
ffffffff8108f50f ffffffff82228240 0000000000000040 ffffffff8234a03c
0000000000000000 0000000000000000 0000000000000000 ffff88007c861e58
Call Trace:
[] dump_stack+0x19/0x1b
[] warn_slowpath_common+0x7f/0xc0
[] warn_slowpath_null+0x1a/0x20
[] init_workqueues+0x35/0x505
...v2: CPU number added to the generic debug info as requested by s390
folks and dropped the s390 specific dump_stack(). This loses %ksp
from the debug message which the maintainers think isn't important
enough to keep the s390-specific dump_stack() implementation.dump_stack_print_info() is moved to kernel/printk.c from
lib/dump_stack.c. Because linkage is per objecct file,
dump_stack_print_info() living in the same lib file as generic
dump_stack() means that archs which implement custom dump_stack()
- at this point, only blackfin - can't use dump_stack_print_info()
as that will bring in the generic version of dump_stack() too. v1
The v1 patch broke build on blackfin due to this issue. The build
breakage was reported by Fengguang Wu.Signed-off-by: Tejun Heo
Acked-by: David S. Miller
Acked-by: Vineet Gupta
Acked-by: Jesper Nilsson
Acked-by: Vineet Gupta
Acked-by: Martin Schwidefsky [s390 bits]
Cc: Heiko Carstens
Cc: Mike Frysinger
Cc: Fengguang Wu
Cc: Bjorn Helgaas
Cc: Sam Ravnborg
Acked-by: Richard Kuo [hexagon bits]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
08 Apr, 2013
1 commit
-
Signed-off-by: Thomas Gleixner
Cc: Linus Torvalds
Cc: Rusty Russell
Cc: Paul McKenney
Cc: Peter Zijlstra
Reviewed-by: Cc: Srivatsa S. Bhat
Cc: Magnus Damm
Cc: David Howells
Link: http://lkml.kernel.org/r/20130321215234.217235264@linutronix.de
Signed-off-by: Thomas Gleixner
04 Feb, 2013
3 commits
-
Signed-off-by: Al Viro
-
Signed-off-by: Al Viro
-
Signed-off-by: Al Viro
04 Jan, 2013
1 commit
-
This fixes up all of the smaller arches that had __dev* markings for
their platform-specific drivers.CONFIG_HOTPLUG is going away as an option. As a result, the __dev*
markings need to be removed.This change removes the use of __devinit, __devexit_p, __devinitdata,
__devinitconst, and __devexit from these drivers.Based on patches originally written by Bill Pemberton, but redone by me
in order to handle some of the coding style issues better, by hand.Cc: Bill Pemberton
Cc: Peter Zijlstra
Cc: Paul Mackerras
Cc: Ingo Molnar
Cc: Arnaldo Carvalho de Melo
Cc: Catalin Marinas
Cc: Will Deacon
Cc: Haavard Skinnemoen
Cc: Hans-Christian Egtvedt
Cc: Mike Frysinger
Cc: Mikael Starvik
Cc: Jesper Nilsson
Cc: David Howells
Cc: Hirokazu Takata
Cc: Geert Uytterhoeven
Cc: Michal Simek
Cc: Koichi Yasutake
Cc: Jonas Bonn
Cc: "James E.J. Bottomley"
Cc: Helge Deller
Cc: Martin Schwidefsky
Cc: Heiko Carstens
Cc: Chen Liqin
Cc: Lennox Wu
Cc: Paul Mundt
Cc: Chris Metcalf
Cc: Guan Xuetao
Cc: Bob Liu
Cc: Srinivas Kandagatla
Cc: Bjorn Helgaas
Cc: Myron Stowe
Cc: Thomas Gleixner
Cc: Andrew Morton
Cc: Andi Kleen
Cc: Jesse Barnes
Cc: Sebastian Andrzej Siewior
Cc: Yinghai Lu
Cc: Thierry Reding
Cc: Greg Ungerer
Cc: Grant Likely
Cc: "Srivatsa S. Bhat"
Cc: Mark Salter
Cc: Yong Zhang
Cc: Michael Holzheu
Cc: Cornelia Huck
Cc: Jan Glauber
Cc: Wei Yongjun
Cc: Nobuhiro Iwamatsu
Signed-off-by: Greg Kroah-Hartman