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2010-10-26percpu_counter: add debugobj supportTejun Heo
All percpu counters are linked to a global list on initialization and removed from it on destruction. The list is walked during CPU up/down. If a percpu counter is freed without being properly destroyed, the system will oops only on the next CPU up/down making it pretty nasty to track down. This patch adds debugobj support for percpu counters so that such problems can be found easily. As percpu counters don't make sense on stack and can't be statically initialized, debugobj support is pretty simple. It's initialized and activated on counter initialization, and deactivatd and destroyed on counter destruction. With this patch applied, the bug fixed by commit 602586a83b719df0fbd94196a1359ed35aeb2df3 (shmem: put_super must percpu_counter_destroy) triggers the following warning on tmpfs unmount and the system won't oops on the next cpu up/down operation. ------------[ cut here ]------------ WARNING: at lib/debugobjects.c:259 debug_print_object+0x5c/0x70() Hardware name: Bochs ODEBUG: free active (active state 0) object type: percpu_counter Modules linked in: Pid: 3999, comm: umount Not tainted 2.6.36-rc2-work+ #5 Call Trace: [<ffffffff81083f7f>] warn_slowpath_common+0x7f/0xc0 [<ffffffff81084076>] warn_slowpath_fmt+0x46/0x50 [<ffffffff813b45cc>] debug_print_object+0x5c/0x70 [<ffffffff813b50e5>] debug_check_no_obj_freed+0x125/0x210 [<ffffffff811577d3>] kfree+0xb3/0x2f0 [<ffffffff81132edd>] shmem_put_super+0x1d/0x30 [<ffffffff81162e96>] generic_shutdown_super+0x56/0xe0 [<ffffffff81162f86>] kill_anon_super+0x16/0x60 [<ffffffff81162ff7>] kill_litter_super+0x27/0x30 [<ffffffff81163295>] deactivate_locked_super+0x45/0x60 [<ffffffff81163cfa>] deactivate_super+0x4a/0x70 [<ffffffff8117d446>] mntput_no_expire+0x86/0xe0 [<ffffffff8117df7f>] sys_umount+0x6f/0x360 [<ffffffff8103f01b>] system_call_fastpath+0x16/0x1b ---[ end trace cce2a341ba3611a7 ]--- Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Thomas Gleixner <tglxlinutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26idr: fix idr_pre_get() locking descriptionNaohiro Aota
Despite the idr_pre_get() kernel-doc, there are some cases where you can call idr_pre_get() from within locked regions. Add a description for such cases. See also: http://lkml.org/lkml/2010/9/16/462 [akpm@linux-foundation.org: cleanups, grammatical fixes] Signed-off-by: Naohiro Aota <naota@elisp.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26lib/bitmap.c: use hex_to_bin()Andy Shevchenko
Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26MAINTAINERS: use "T: git" and whitespace triviaJoe Perches
Add missing git as a prefix for git repositories in the few places it wasn't already used. Convert a space delimiter to a tab. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26MAINTAINERS: remove USB ZC0301 DRIVERJoe Perches
Removed by commit 0d58cef664e01f ("V4L/DVB: Remove obsolete zc0301 v4l driver"). Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Amerigo Wang <amwang@redhat.com> Cc: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26MAINTAINERS: remove USB OV511 DRIVERJoe Perches
Removed by commit 7373ab3669aec93 ("V4L/DVB: Remove obsolete ov511 driver"). Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Amerigo Wang <amwang@redhat.com> Cc: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26MAINTAINERS: merge s3c6400 and 6410 to 64xxJoe Perches
Removed by commit 431107ea5b680a24a ("ARM: S3C64XX: Merge mach-s3c6400 and mach-s3c6410"). Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26MAINTAINERS: merge s3c-244x sectionsJoe Perches
Removed by commit 70556b143ae4c ("ARM: S3C24XX: Remove old mach-s3c2442"). Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26MAINTAINERS: merge imote2 and stargateJoe Perches
Removed by commit dcd925f95194da4 ("pxa: merge stargate2 and imote2 board files"). Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Jonathan Cameron <jic23@cam.ac.uk> Acked-by: Eric Miao <eric.y.miao@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26MAINTAINERS: fix Colibri PXA270 file patternJoe Perches
The original commit 403d29713e0a ("pxa/income: Add Income SBC support") started with the wrong file pattern. Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Marek Vasut <marek.vasut@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26scripts/get_maintainer.pl: don't deduplicate unnamed addresses ie: mailing listsJoe Perches
Fix a defect with the first mailing list address being used for each subsequent mailing list. Updated to 0.26-beta6. Signed-off-by: Joe Perches <joe@perches.com> Cc: Florian Mickler <florian@mickler.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26scripts/get_maintainer.pl: use mailmap in name deduplication and other updatesJoe Perches
Use Florian Mickler's mailmap routine to reduce name duplication. o Add subroutine deduplicate_email to centralize code o Add hashes for deduplicate_(name|address)_hash o Remove now unused @interactive_to o Whitespace neatening o Add command line --help text o Add --mailmap command line option control o Interactive changes: - Add toggles for maintainer, git and list selections - Default selection is all - Add mailmap control Update to 0.26-beta5 Signed-off-by: Joe Perches <joe@perches.com> Cc: Florian Mickler <florian@mickler.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26scripts/get_maintainer.pl: correct indentation in a few placesJoe Perches
And a miscellaneous conversion of You to you in a help message Signed-off-by: Joe Perches <joe@perches.com> Cc: Florian Mickler <florian@mickler.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26scripts/get_maintainer.pl: fix mailmap handlingFlorian Mickler
Implement it, like it is described in git-shortlog. Signed-off-by: Florian Mickler <florian@mickler.org> Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26scripts/get_maintainer.pl: use case insensitive name de-duplicationJoe Perches
Case insensitive name and email address matching can help reduce duplication when authors don't always use the exact same signature. o Add a --interactive per-file exact_match hash so git history can be checked on per-file only when there is no direct maintainer o Make @interactive_to list global so save_commits_by_<foo> can check email names & addresses against this list for duplication o Don't allow --interactive and --sections o rename subroutine get_maintainer to get_maintainers o Added help text option to --interactive menu prompt Update version to 0.26-beta4 Signed-off-by: Joe Perches <joe@perches.com> Cc: Florian Mickler <florian@mickler.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26scripts/get_maintainer.pl: improve --interactive UIJoe Perches
o Added searching by git-blame as well as git-history o Added different selection toggles o Added ability to list commits by author or by sign-off-type o Use custom git and hg formats to make searching for subject/author a bit easier. o Move inlined section matching and searching git/hg history to new get_maintainer subroutine o Added subroutines save_commits_by_author and save_commits_by_signer o Removed subroutines vcs_get_shortlog and vcs_email_shortlog o Rename camelcase signaturePattern to signature_pattern Update to 0.26 beta3 Signed-off-by: Joe Perches <joe@perches.com> Cc: Florian Mickler <florian@mickler.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26scripts/get_maintainer.pl: add interactive modeFlorian Mickler
This is a first version of an interactive mode for scripts/get_maintainer.pl. It allows the user to interact with the script. Each cc candidate can be selected and deselected and a shortlog of authored commits can be displayed for each candidate. The menu is displayed via STDERR, the end result is outputted to STDOUT. This unusual mechanism allows using get_maintainer.pl in interactive mode via git send-email --cc-cmd. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26scripts/get_maintainer.pl: use .get_maintainer.conf from . then $HOME then ↵Joe Perches
scripts On Mon, 2010-09-13 at 00:01 -0400, Valdis.Kletnieks@vt.edu wrote: > Any chance of getting that to be ~/.get_maintainer.conf rather than > ./.get_maintainer.conf? I've just gotten bit like the 3rd or 4th time by > "oh but you didn't create that file in *this* tree" > (I usually have a linus git tree, a linux-next tree, and 3-4 -mm trees) Sure. Add a search path for the .conf file. 3 paths are added: . customized per-tree configurations $HOME user global configuration when per-tree configs don't exist ./scripts lk defaults to override script Signed-off-by: Joe Perches <joe@perches.com> Cc: Valdis Kletnieks <Valdis.Kletnieks@vt.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26scripts/get_maintainer.pl: add default --git-fallback, remove default --gitJoe Perches
Adding commit signers when there is a listed MAINTAINER for a file can make the output list longer than necessary. Change the --git default from on to off. Add a new --git-fallback option (default on) used to add commit signers only when there is no MAINTAINER for a file. git history is used when --git-fallback is enabled and the pattern directory depth is not the same as the file directory depth. For instance: X86 ARCHITECTURE (32-BIT AND 64-BIT) M: Thomas Gleixner <tglx@linutronix.de> M: Ingo Molnar <mingo@redhat.com> M: "H. Peter Anvin" <hpa@zytor.com> M: x86@kernel.org T: git git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86.git S: Maintained F: Documentation/x86/ F: arch/x86/ If using "./scripts/get_maintainer -f arch/x86/lib/atomic64_32.c", the pattern for "arch/x86/" does not match the directory depth of "arch/x86/lib" so the MAINTAINERS entries and git history is used to produce: $ ./scripts/get_maintainer.pl -f --rolestats arch/x86/lib/atomic64_32.c Thomas Gleixner <tglx@linutronix.de> (maintainer:X86 ARCHITECTURE...) Ingo Molnar <mingo@redhat.com> (maintainer:X86 ARCHITECTURE...) "H. Peter Anvin" <hpa@zytor.com> (maintainer:X86 ARCHITECTURE...,commit_signer:1/1=100%) x86@kernel.org (maintainer:X86 ARCHITECTURE...) Luca Barbieri <luca@luca-barbieri.com> (commit_signer:1/1=100%) linux-kernel@vger.kernel.org (open list) Luca Barbieri is added because he signed the only commit to arch/x86/lib/atomic64_32.c during the last year and he meets the other default qualifications. --git-min-percent (default:10) --git-min-signatures (default:1) If current users of ./scripts/get_maintainers.pl have scripts that use --nogit that expect git history to be excluded, those scripts should be updated to include --nogit-fallback or a .get_maintainer.conf file should be created with --nogit-fallback. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26scripts/get_maintainer.pl: don't search MAINTAINERS for keywords or emailsJoe Perches
Keyword matching uses K: patterns from MAINTAINERS, so if looking for the MAINTAINERS maintainer, don't search MAINTAINERS for pattern matches. MAINTAINERS also has rather a lot of email addresses and is easily searched using grep "^M:", so skip it. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26scripts/get_maintainer.pl: use correct indentationJoe Perches
Fix an overly indented block. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26scripts/get_maintainer.pl: Add --git-blame --rolestats "Authored lines" ↵Joe Perches
information When options --git-blame and --rolestats are specified, add the maintainers with the qualifying --git-min-percent amount of lines authored of the complete file. Does not add more authors than specified by --git-max-maintainers. For anyone using hg, this option works but is _very_ slow. It's orders of magnitude slower than git slow. The get_maintainer.pl version was incremented to 0.25. This can be used with or without --git. For instance: $ ./scripts/get_maintainer.pl --git-blame --nogit --rolestats -f lib/bitmap.c Paul Jackson <pj@sgi.com> (authored lines:406/613=66%,commits:7/20=35%) Akinobu Mita <mita@miraclelinux.com> (authored lines:87/613=14%,commits:3/20=15%) Reinette Chatre <reinette.chatre@linux.intel.com> (authored lines:42/613=7%) Andrew Morton <akpm@linux-foundation.org> (commits:16/20=80%) Paul Mundt <lethal@linux-sh.org> (commits:3/20=15%) Randy Dunlap <randy.dunlap@oracle.com> (commits:2/20=10%) $ ./scripts/get_maintainer.pl --git-blame --git --rolestats -f lib/bitmap.c Andrew Morton <akpm@linux-foundation.org> (commit_signer:4/5=80%,commits:16/20=80%) Akinobu Mita <akinobu.mita@gmail.com> (commit_signer:2/5=40%,authored lines:87/613=14%,commits:3/20=15%) Jack Steiner <steiner@sgi.com> (commit_signer:1/5=20%) Ben Hutchings <ben@decadent.org.uk> (commit_signer:1/5=20%) Lee Schermerhorn <lee.schermerhorn@hp.com> (commit_signer:1/5=20%) Paul Jackson <pj@sgi.com> (authored lines:406/613=66%,commits:7/20=35%) Reinette Chatre <reinette.chatre@linux.intel.com> (authored lines:42/613=7%) Paul Mundt <lethal@linux-sh.org> (commits:3/20=15%) Randy Dunlap <randy.dunlap@oracle.com> (commits:2/20=10%) linux-kernel@vger.kernel.org (open list) Signed-off-by: Joe Perches <joe@perches.com> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26lib: fix scnprintf() if @size is == 0Changli Gao
scnprintf() should return 0 if @size is == 0. Update the comment for it, as @size is unsigned. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26vsprintf.c: use default pointer field size for "(null)" stringsJoe Perches
It might be nicer to align the output. For instance, ACPI messages sometimes have "(null)" pointers. $ dmesg | grep "(null)" -A 1 -B 1 [ 0.198733] ACPI: Dynamic OEM Table Load: [ 0.198745] ACPI: SSDT (null) 00239 (v02 PmRef Cpu0Ist 00003000 INTL 20051117) [ 0.199294] ACPI: SSDT 7f596e10 001C7 (v02 PmRef Cpu0Cst 00003001 INTL 20051117) [ 0.200708] ACPI: Dynamic OEM Table Load: [ 0.200721] ACPI: SSDT (null) 001C7 (v02 PmRef Cpu0Cst 00003001 INTL 20051117) [ 0.201950] ACPI: SSDT 7f597f10 000D0 (v02 PmRef Cpu1Ist 00003000 INTL 20051117) [ 0.203386] ACPI: Dynamic OEM Table Load: [ 0.203398] ACPI: SSDT (null) 000D0 (v02 PmRef Cpu1Ist 00003000 INTL 20051117) [ 0.203871] ACPI: SSDT 7f595f10 00083 (v02 PmRef Cpu1Cst 00003000 INTL 20051117) [ 0.205301] ACPI: Dynamic OEM Table Load: [ 0.205315] ACPI: SSDT (null) 00083 (v02 PmRef Cpu1Cst 00003000 INTL 20051117) [akpm@linux-foundation.org: add code comment] Signed-off-by: Joe Perches <joe@perches.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26ratelimit: add comment warning people off printk_ratelimit()Andrew Morton
printk_ratelimit() was a bad idea - we don't want subsytem A causing ratelimiting of subsystem B's messages. Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26printk: declare printk_ratelimit_state in ratelimit.hNamhyung Kim
Adding declaration of printk_ratelimit_state in ratelimit.h removes potential build breakage and following sparse warning: kernel/printk.c:1426:1: warning: symbol 'printk_ratelimit_state' was not declared. Should it be static? [akpm@linux-foundation.org: remove unneeded ifdef] Signed-off-by: Namhyung Kim <namhyung@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26printk: change type of 'boot_delay' to int *Namhyung Kim
get_option() takes its 2nd arg as int * so passing boot_delay to it caused following warnings from sparse: kernel/printk.c:223:27: warning: incorrect type in argument 2 (different signedness) kernel/printk.c:223:27: expected int *pint kernel/printk.c:223:27: got unsigned int static [toplevel] *<noident> Since boot_delay can't grow more than 10,000 changing it to 'int *' will not produce any problem. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26printk: add lock context annotationNamhyung Kim
acquire_console_semaphore_for_printk() releases logbuf_lock but was missing proper annotation. Add it. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26printk: fixup declaration of kmsg_reasonsNamhyung Kim
Move redundant 'const' after '*' to make pointer itself const Signed-off-by: Namhyung Kim <namhyung@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26misc devices: do not enable by defaultBorislav Petkov
Do not enable this Kconfig menu by default since it contains devices not present on the majority of systems. This is becoming a pain and a waste of time especially when doing a bunch of kernel builds on different systems daily and have to answer "make oldconfig" prompts for strange devices. Signed-off-by: Borislav Petkov <bp@alien8.de> Acked-by: Mike Frysinger <vapier@gentoo.org> Cc: Michael Hennerich <michael.hennerich@analog.com> Cc: Andres Salomon <dilinger@collabora.co.uk> Cc: Jean Delvare <khali@linux-fr.org> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26kernel: remove PF_FLUSHERPeter Zijlstra
PF_FLUSHER is only ever set, not tested, remove it. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26stop_machine: convert cpu notifier to return encapsulate errno valueAkinobu Mita
In commit e6bde73b07edeb703d4c89c1daabc09c303de11f ("cpu-hotplug: return better errno on cpu hotplug failure"), the cpu notifier can return an encapsulated errno value. This converts the cpu notifier to return an encapsulated errno value for stop_machine(). Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26kernel/stop_machine.c: fix unused variable warningRakib Mullick
kernel/stop_machine.c: In function `cpu_stopper_thread': kernel/stop_machine.c:265: warning: unused variable `ksym_buf' ksym_buf[] is unused if WARN_ON() is a no-op. Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26fs: allow for more than 2^31 filesEric Dumazet
Robin Holt tried to boot a 16TB system and found af_unix was overflowing a 32bit value : <quote> We were seeing a failure which prevented boot. The kernel was incapable of creating either a named pipe or unix domain socket. This comes down to a common kernel function called unix_create1() which does: atomic_inc(&unix_nr_socks); if (atomic_read(&unix_nr_socks) > 2 * get_max_files()) goto out; The function get_max_files() is a simple return of files_stat.max_files. files_stat.max_files is a signed integer and is computed in fs/file_table.c's files_init(). n = (mempages * (PAGE_SIZE / 1024)) / 10; files_stat.max_files = n; In our case, mempages (total_ram_pages) is approx 3,758,096,384 (0xe0000000). That leaves max_files at approximately 1,503,238,553. This causes 2 * get_max_files() to integer overflow. </quote> Fix is to let /proc/sys/fs/file-nr & /proc/sys/fs/file-max use long integers, and change af_unix to use an atomic_long_t instead of atomic_t. get_max_files() is changed to return an unsigned long. get_nr_files() is changed to return a long. unix_nr_socks is changed from atomic_t to atomic_long_t, while not strictly needed to address Robin problem. Before patch (on a 64bit kernel) : # echo 2147483648 >/proc/sys/fs/file-max # cat /proc/sys/fs/file-max -18446744071562067968 After patch: # echo 2147483648 >/proc/sys/fs/file-max # cat /proc/sys/fs/file-max 2147483648 # cat /proc/sys/fs/file-nr 704 0 2147483648 Reported-by: Robin Holt <holt@sgi.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: David Miller <davem@davemloft.net> Reviewed-by: Robin Holt <holt@sgi.com> Tested-by: Robin Holt <holt@sgi.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26kernel/user.c: add lock release annotation on free_user()Namhyung Kim
free_user() releases uidhash_lock but was missing annotation. Add it. This removes following sparse warnings: include/linux/spinlock.h:339:9: warning: context imbalance in 'free_user' - unexpected unlock kernel/user.c:120:6: warning: context imbalance in 'free_uid' - wrong count at exit Signed-off-by: Namhyung Kim <namhyung@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Dhaval Giani <dhaval.giani@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26init: mark __user address space on string literalsNamhyung Kim
When calling syscall service routines in kernel, some of arguments should be user pointers but were missing __user markup on string literals. Add it. Removes some sparse warnings. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Cc: Phillip Lougher <phillip@lougher.demon.co.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26drivers/misc/apds9802als.c: add runtime PM supportHong Liu
Update the driver for the needed runtime power features. Remove the old user controlled power functions. [akpm@linux-foundation.org: put PM code under CONFIG_PM] Signed-off-by: Hong Liu <hong.liu@intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26drivers/misc/apds9802als.c: ALS drivers for the apds9802alsanantha
This adds support for the ADPS9802ALS sensor. Cleanup by Alan Cox - move mutexes to cover more things - report I/O errors back to user space - report range and values in LUX Signed-off-by: Anantha Narayanan <anantha.narayanan@intel.com> [The 4K and 64K in the hw spec actually means 4095 (12bit) and 65535 (16bit).] Signed-off-by: Hong Liu <hong.liu@intel.com> [Updated to match the ALS light API interface convention from Samu] Signed-off-by: Alan Cox <alan@linux.intel.com> Acked-by: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26pca953x: pca953x driver fixes for x86 mrstAlek Du
Our Moorestown platform has two max7315 chips which is covered by pca953x i2c gpio driver. A while ago this driver got updated with nested irq thread support, and it broke the compatibity with "request_irq". For example, the gpio_keys.c driver can not work with this driver now. This patch fixes the issue by switching to generic_handle_irq. Also fix the irq_base issue: irq_base == 0 is valid, and a "-1" value should mean invalid. IRQ 0 is not a valid IRQ, irq_base of 0 is valid. Signed-off-by: Alek Du <alek.du@intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26drivers/misc/isl29020.c: ambient light sensorKalhan Trisal
The LS driver will read the latest Lux measurement based upon the light brightness and will report the LUX output through sysfs interface. This hardware isn't quite the same as the ISL29003 so has a different driver. [akpm@linux-foundation.org: put PM code under #ifdef CONFIG_PM] Signed-off-by: Kalhan Trisal <kalhan.trisal@intel.com> [Runtime power management support added] Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> [Fixes to runtime PM] Signed-off-by: Liu Hong <hong.liu@intel.com> [Cleanups and added checks for I2C errors, reworked the API to match the saner one agreed for other sensors] Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26lkdtm: prefix enum constantsNamhyung Kim
Prefix cname and ctype constants with CN/CT_. This is especially for the conflict on BUG which causes a build break if arch defines it as a inline function, i.e. MIPS. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Cc: Ankita Garg <ankita@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26Documentation: short descriptions for bh1770glc and apds990x driversSamu Onkalo
Add short documentation for two ALS / proximity chip drivers. Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Acked-by: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26drivers/misc: driver for APDS990X ALS and proximity sensorsSamu Onkalo
This is a driver for Avago APDS990X combined ALS and proximity sensor. Interface is sysfs based. The driver uses interrupts to provide new data. The driver supports pm_runtime and regulator frameworks. See Documentation/misc-devices/apds990x.txt for details Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Acked-by: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26drivers/misc: driver for bh1770glc / sfh7770 ALS and proximity sensorSamu Onkalo
This is a driver for ROHM BH1770GLC and OSRAM SFH7770 combined ALS and proximity sensor. Interface is sysfs based. The driver uses interrupts to provide new data. The driver supports pm_runtime and regulator frameworks. See Documentation/misc-devices/bh1770glc.txt for details Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Acked-by: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26ad525x_dpot: use correct rdac channel for ad5251/ad5252steven miao
The ad5251/ad5252 devices have rdac1 and rdac3, but no rdac0. So make sure we use the right channels so userspace gets correct data and not just garbage. Signed-off-by: steven miao <realmz6@gmail.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Michael Hennerich <michael.hennerich@analog.com> Cc: Chris Verges <chrisv@cyberswitching.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26drivers/misc/ad525x_dpot.c: new featuresMichael Hennerich
Add support for AD5270, AD5271, AD5272, AD5274 digital potentiometers. Add 20-TP feature for AD5291 and AD5292 parts, and update feature list. AD5291 rdac read back must be shifted by two. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Chris Verges <chrisv@cyberswitching.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26drivers/misc/ad525x_dpot.c: fix part name typos in definesMichael Hennerich
There is no runtime effect by this change. It frees up namespace for defines erroneously used. This is required to actually support devices requiring the namespace, added with "drivers/misc/ad525x_dpot.c: new features". All defines touched have the same value defined, after the change. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Chris Verges <chrisv@cyberswitching.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26drivers/misc/phantom.c: add missing warning messages in phantom_probe()Rahul Ruikar
phantom_probe() can fail in many places. Add missing warning messages in pci_enable_device() and pci_request_regions(). Signed-off-by: Rahul Ruikar <rahul.ruikar@gmail.com> Cc: Jiri Slaby <jirislaby@gmail.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26workqueues: s/ON_STACK/ONSTACK/Andrew Morton
Silly though it is, completions and wait_queue_heads use foo_ONSTACK (COMPLETION_INITIALIZER_ONSTACK, DECLARE_COMPLETION_ONSTACK, __WAIT_QUEUE_HEAD_INIT_ONSTACK and DECLARE_WAIT_QUEUE_HEAD_ONSTACK) so I guess workqueues should do the same thing. s/INIT_WORK_ON_STACK/INIT_WORK_ONSTACK/ s/INIT_DELAYED_WORK_ON_STACK/INIT_DELAYED_WORK_ONSTACK/ Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26procfs: fix numbering in /proc/locksJerome Marchand
The lock number in /proc/locks (first field) is implemented by a counter (private field of struct seq_file) which is incremented at each call of locks_show() and reset to 1 in locks_start() whatever the offset is. It should be reset according to the actual position in the list. Because of this, the numbering erratically restarts at 1 several times when reading a long /proc/locks file. Moreover, locks_show() can be called twice to print a single line thus skipping a number. The counter should be incremented in locks_next(). And last, pos is a loff_t, which can be bigger than a pointer, so we don't use the pointer as an integer anymore, and allocate a loff_t instead. Signed-off-by: Jerome Marchand <jmarchan@redhat.com> Cc: Pavel Emelyanov <xemul@parallels.com> Cc: Matthew Wilcox <matthew@wil.cx> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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