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2013-04-30Hexagon: add support for new v4+ registersRichard Kuo8-48/+206
Add support for a couple new v4+ registers, along with newer save/restore pt_regs. Signed-off-by: Richard Kuo <[email protected]>
2013-04-30Hexagon: add individual register access for switch_stackRichard Kuo1-6/+43
Signed-off-by: Richard Kuo <[email protected]>
2013-04-30Hexagon: use defines for MIN_KERNEL_SEG calculationRichard Kuo1-1/+1
Signed-off-by: Richard Kuo <[email protected]>
2013-04-30Hexagon: use GENERIC_CPU_DEVICESRichard Kuo3-53/+2
Signed-off-by: Richard Kuo <[email protected]>
2013-04-30Hexagon: change arch version config to allow comparisonsRichard Kuo3-31/+10
Signed-off-by: Richard Kuo <[email protected]>
2013-04-30Hexagon: add support for ARCH_PFN_OFFSETRichard Kuo8-55/+91
Add support for loading the kernel at a physical offset. The offset should still be 4M aligned. Signed-off-by: Richard Kuo <[email protected]>
2013-04-30Hexagon: fix __atomic_add_unlessRichard Kuo1-9/+11
Signed-off-by: Richard Kuo <[email protected]>
2013-04-30Hexagon: clean up generic headers in KbuildRichard Kuo1-1/+1
Signed-off-by: Richard Kuo <[email protected]>
2013-04-30Merge branch 'akpm' (incoming from Andrew)Linus Torvalds214-1690/+2820
Merge third batch of fixes from Andrew Morton: "Most of the rest. I still have two large patchsets against AIO and IPC, but they're a bit stuck behind other trees and I'm about to vanish for six days. - random fixlets - inotify - more of the MM queue - show_stack() cleanups - DMI update - kthread/workqueue things - compat cleanups - epoll udpates - binfmt updates - nilfs2 - hfs - hfsplus - ptrace - kmod - coredump - kexec - rbtree - pids - pidns - pps - semaphore tweaks - some w1 patches - relay updates - core Kconfig changes - sysrq tweaks" * emailed patches from Andrew Morton <[email protected]>: (109 commits) Documentation/sysrq: fix inconstistent help message of sysrq key ethernet/emac/sysrq: fix inconstistent help message of sysrq key sparc/sysrq: fix inconstistent help message of sysrq key powerpc/xmon/sysrq: fix inconstistent help message of sysrq key ARM/etm/sysrq: fix inconstistent help message of sysrq key power/sysrq: fix inconstistent help message of sysrq key kgdb/sysrq: fix inconstistent help message of sysrq key lib/decompress.c: fix initconst notifier-error-inject: fix module names in Kconfig kernel/sys.c: make prctl(PR_SET_MM) generally available UAPI: remove empty Kbuild files menuconfig: print more info for symbol without prompts init/Kconfig: re-order CONFIG_EXPERT options to fix menuconfig display kconfig menu: move Virtualization drivers near other virtualization options Kconfig: consolidate CONFIG_DEBUG_STRICT_USER_COPY_CHECKS relay: use macro PAGE_ALIGN instead of FIX_SIZE kernel/relay.c: move FIX_SIZE macro into relay.c kernel/relay.c: remove unused function argument actor drivers/w1/slaves/w1_ds2760.c: fix the error handling in w1_ds2760_add_slave() drivers/w1/slaves/w1_ds2781.c: fix the error handling in w1_ds2781_add_slave() ...
2013-04-30Merge tag 'md-3.10' of git://neil.brown.name/mdLinus Torvalds9-131/+368
Pull md fixes from NeilBrown: "A mixed bag of little fixes. No real new functionality here. Several patches are tagged for -stable." * tag 'md-3.10' of git://neil.brown.name/md: MD: ignore discard request for hard disks of hybid raid1/raid10 array md: bad block list should default to disabled. md: raid1/raid10 md devices leak memory when stopping DM RAID: Add message/status support for changing sync action MD: Export 'md_reap_sync_thread' function md: don't update metadata when stopping a read-only array. md: Allow devices to be re-added to a read-only array. md/raid10: Allow skipping recovery when clean arrays are assembled MD: Fix typos in MD documentation md/raid5: avoid an extra write when writing to a known-bad-block. md/raid5: Change or of some order to improve efficiency. md: use set_bit_le and clear_bit_le md: HOT_DISK_REMOVE shouldn't make a read-auto device active. md: use common code for all calls to ->hot_remove_disk() md: never update metadata when array is read-only.
2013-04-30Documentation/sysrq: fix inconstistent help message of sysrq keyzhangwei(Jovi)1-10/+10
Currently help message of /proc/sysrq-trigger highlight its upper-case characters, like below: SysRq : HELP : loglevel(0-9) reBoot Crash terminate-all-tasks(E) memory-full-oom-kill(F) kill-all-tasks(I) ... this would confuse user trigger sysrq by upper-case character, which is inconsistent with the real lower-case character registed key. This inconsistent help message will also lead more confused when 26 upper-case letters put into use in future. This patch fix sysrq documentation. Signed-off-by: zhangwei(Jovi) <[email protected]> Cc: Randy Dunlap <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30ethernet/emac/sysrq: fix inconstistent help message of sysrq keyzhangwei(Jovi)1-1/+1
Currently help message of /proc/sysrq-trigger highlight its upper-case characters, like below: SysRq : HELP : loglevel(0-9) reBoot Crash terminate-all-tasks(E) memory-full-oom-kill(F) kill-all-tasks(I) ... this would confuse user trigger sysrq by upper-case character, which is inconsistent with the real lower-case character registed key. This inconsistent help message will also lead more confused when 26 upper-case letters put into use in future. This patch ethernet emac sysrq key: "emac(c)" Signed-off-by: zhangwei(Jovi) <[email protected]> Cc: Josh Boyer <[email protected]> Cc: Thadeu Lima de Souza Cascardo <[email protected]> Cc: David Miller <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30sparc/sysrq: fix inconstistent help message of sysrq keyzhangwei(Jovi)1-2/+2
Currently help message of /proc/sysrq-trigger highlight its upper-case characters, like below: SysRq : HELP : loglevel(0-9) reBoot Crash terminate-all-tasks(E) memory-full-oom-kill(F) kill-all-tasks(I) ... this would confuse user trigger sysrq by upper-case character, which is inconsistent with the real lower-case character registed key. This inconsistent help message will also lead more confused when 26 upper-case letters put into use in future. This patch fix spare sysrq key: "global-regs(y)" Signed-off-by: zhangwei(Jovi) <[email protected]> Acked-by: David S. Miller <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30powerpc/xmon/sysrq: fix inconstistent help message of sysrq keyzhangwei(Jovi)1-1/+1
Currently help message of /proc/sysrq-trigger highlight its upper-case characters, like below: SysRq : HELP : loglevel(0-9) reBoot Crash terminate-all-tasks(E) memory-full-oom-kill(F) kill-all-tasks(I) ... this would confuse user trigger sysrq by upper-case character, which is inconsistent with the real lower-case character registed key. This inconsistent help message will also lead more confused when 26 upper-case letters put into use in future. This patch fix powerpc xmon sysrq key: "xmon(x)" Signed-off-by: zhangwei(Jovi) <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30ARM/etm/sysrq: fix inconstistent help message of sysrq keyzhangwei(Jovi)1-1/+1
Currently help message of /proc/sysrq-trigger highlights its upper-case characters, like below: SysRq : HELP : loglevel(0-9) reBoot Crash terminate-all-tasks(E) memory-full-oom-kill(F) kill-all-tasks(I) ... this would confuse user trigger sysrq by upper-case character, which is inconsistent with the real lower-case character registed key. This inconsistent help message will also lead more confused when 26 upper-case letters put into use in future. This patch fix arm etm sysrq key: "etm-buffer-dump(v)" (This patch also add "-" to separate each sysrq key help word, instead of spaces) Signed-off-by: zhangwei(Jovi) <[email protected]> Acked-by: Randy Dunlap <[email protected]> Cc: Russell King <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30power/sysrq: fix inconstistent help message of sysrq keyzhangwei(Jovi)1-1/+1
Currently help message of /proc/sysrq-trigger highlight its upper-case characters, like below: SysRq : HELP : loglevel(0-9) reBoot Crash terminate-all-tasks(E) memory-full-oom-kill(F) kill-all-tasks(I) ... this would confuse user trigger sysrq by upper-case character, which is inconsistent with the real lower-case character registed key. This inconsistent help message will also lead more confused when 26 upper-case letters put into use in future. This patch fix power off sysrq key: "poweroff(o)" Signed-off-by: zhangwei(Jovi) <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30kgdb/sysrq: fix inconstistent help message of sysrq keyzhangwei(Jovi)1-1/+1
Currently help message of /proc/sysrq-trigger highlight its upper-case characters, like below: SysRq : HELP : loglevel(0-9) reBoot Crash terminate-all-tasks(E) memory-full-oom-kill(F) kill-all-tasks(I) ... this would confuse user trigger sysrq by upper-case character, which is inconsistent with the real lower-case character registed key. This inconsistent help message will also lead more confused when 26 upper-case letters put into use in future. This patch fix kgdb sysrq key: "debug(g)" Signed-off-by: zhangwei(Jovi) <[email protected]> Cc: Jason Wessel <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30lib/decompress.c: fix initconstAndi Kleen1-1/+1
Signed-off-by: Andi Kleen <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30notifier-error-inject: fix module names in KconfigAkinobu Mita1-2/+2
The Kconfig help text for MEMORY_NOTIFIER_ERROR_INJECT and OF_RECONFIG_NOTIFIER_ERROR_INJECT has mismatched module names. Signed-off-by: Akinobu Mita <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30kernel/sys.c: make prctl(PR_SET_MM) generally availableAmnon Shiloh1-8/+2
The purpose of this patch is to allow privileged processes to set their own per-memory memory-region fields: start_code, end_code, start_data, end_data, start_brk, brk, start_stack, arg_start, arg_end, env_start, env_end. This functionality is needed by any application or package that needs to reconstruct Linux processes, that is, to start them in any way other than by means of an "execve()" from an executable file. This includes: 1. Restoring processes from a checkpoint-file (by all potential user-level checkpointing packages, not only CRIU's). 2. Restarting processes on another node after process migration. 3. Starting duplicated copies of a running process (for reliability and high-availablity). 4. Starting a process from an executable format that is not supported by Linux, thus requiring a "manual execve" by a user-level utility. 5. Similarly, starting a process from a networked and/or crypted executable that, for confidentiality, licensing or other reasons, may not be written to the local file-systems. The code that does that was already included in the Linux kernel by the CRIU group, in the form of "prctl(PR_SET_MM)", but prior to this was enclosed within their private "#ifdef CONFIG_CHECKPOINT_RESTORE", which is normally disabled. The patch removes those ifdefs. Signed-off-by: Amnon Shiloh <[email protected]> Cc: Cyrill Gorcunov <[email protected]> Cc: Pavel Emelyanov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30UAPI: remove empty Kbuild filesDavid Howells2-4/+0
Remove empty Kbuild files as they cause problems with the patch program which removes files that become empty. Signed-off-by: David Howells <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30menuconfig: print more info for symbol without promptsWengmeiling1-7/+20
When we search a config symbol, if it has no prompt the position of this symbol in the Kconfig file and it's dependencies are not printed. This can be inconvenient, especially when it's set to n and we want to find out why. the following is an example: before: Symbol: GENERIC_SMP_IDLE_THREAD [=y] Type : boolean Selected by: X86 [=y] after: Symbol: GENERIC_SMP_IDLE_THREAD [=y] Type : boolean Defined at arch/Kconfig:213 Selected by: X86 [=y] Signed-off-by: Weng Meiling <[email protected]> Signed-off-by: Libo Chen <[email protected]> Cc: Michal Marek <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30init/Kconfig: re-order CONFIG_EXPERT options to fix menuconfig displayMike Frysinger1-40/+40
The kconfig language requires that dependent options all follow the menuconfig symbol in order to be collapsed below it. Recently some hidden options were added below the EXPERT menuconfig, but did not depend on EXPERT (because hidden options can't). This broke the display. So re-order all these options, and while we're here stick the PCI quirks under the EXPERT menu (since it isn't sitting with any related options). Before this commit, we get: [*] Configure standard kernel features (expert users) ---> [ ] Sysctl syscall support [*] Load all symbols for debugging/ksymoops ... [ ] Embedded system Now we get the older (and correct) behavior: [*] Configure standard kernel features (expert users) ---> [ ] Embedded system And if you go into the expert menu you get the expert options: [ ] Sysctl syscall support [*] Load all symbols for debugging/ksymoops ... Signed-off-by: Mike Frysinger <[email protected]> Acked-by: Randy Dunlap <[email protected]> Cc: zhangwei(Jovi) <[email protected]> Cc: Michal Marek <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30kconfig menu: move Virtualization drivers near other virtualization optionsRandy Dunlap1-2/+2
Make virtualization drivers be logically grouped together (physically near each other) in the kconfig menu by moving "Virtualization drivers" to be near "Virtio drivers", Microsort Hyper-V, and Xen driver support. This is just a user-friendly, visual search change. Signed-off-by: Randy Dunlap <[email protected]> Cc: Alexander Graf <[email protected]> Cc: Stuart Yoder <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30Kconfig: consolidate CONFIG_DEBUG_STRICT_USER_COPY_CHECKSStephen Boyd16-76/+31
The help text for this config is duplicated across the x86, parisc, and s390 Kconfig.debug files. Arnd Bergman noted that the help text was slightly misleading and should be fixed to state that enabling this option isn't a problem when using pre 4.4 gcc. To simplify the rewording, consolidate the text into lib/Kconfig.debug and modify it there to be more explicit about when you should say N to this config. Also, make the text a bit more generic by stating that this option enables compile time checks so we can cover architectures which emit warnings vs. ones which emit errors. The details of how an architecture decided to implement the checks isn't as important as the concept of compile time checking of copy_from_user() calls. While we're doing this, remove all the copy_from_user_overflow() code that's duplicated many times and place it into lib/ so that any architecture supporting this option can get the function for free. Signed-off-by: Stephen Boyd <[email protected]> Acked-by: Arnd Bergmann <[email protected]> Acked-by: Ingo Molnar <[email protected]> Acked-by: H. Peter Anvin <[email protected]> Cc: Arjan van de Ven <[email protected]> Acked-by: Helge Deller <[email protected]> Cc: Heiko Carstens <[email protected]> Cc: Stephen Rothwell <[email protected]> Cc: Chris Metcalf <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30relay: use macro PAGE_ALIGN instead of FIX_SIZEzhangwei(Jovi)1-4/+1
Macro FIX_SIZE is same as PAGE_ALIGN at present, so use PAGE_ALIGN instead. Thanks Andrew found this. Signed-off-by: zhangwei(Jovi) <[email protected]> Cc: Jens Axboe <[email protected]> Cc: Al Viro <[email protected]> Cc: Eric Dumazet <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30kernel/relay.c: move FIX_SIZE macro into relay.czhangwei(Jovi)2-3/+3
It's better to place FIX_SIZE macro in relay.c, instead of relay.h Signed-off-by: zhangwei(Jovi) <[email protected]> Cc: Jens Axboe <[email protected]> Cc: Al Viro <[email protected]> Cc: Eric Dumazet <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30kernel/relay.c: remove unused function argument actorzhangwei(Jovi)1-8/+4
Currently argument `actor' is never used in the relay reading path, so remove it. Signed-off-by: zhangwei(Jovi) <[email protected]> Cc: Jens Axboe <[email protected]> Cc: Al Viro <[email protected]> Cc: Eric Dumazet <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30drivers/w1/slaves/w1_ds2760.c: fix the error handling in w1_ds2760_add_slave()Wei Yongjun1-1/+2
Use platform_device_put() instead of platform_device_unregister() if platform_device_add() fail, and platform_device_del() should be used in the error handling case after platform_device_add() success. Signed-off-by: Wei Yongjun <[email protected]> Cc: Evgeniy Polyakov <[email protected]> Cc: Greg KH <[email protected]> Cc: Neil Brown <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30drivers/w1/slaves/w1_ds2781.c: fix the error handling in w1_ds2781_add_slave()Wei Yongjun1-1/+2
Use platform_device_put() instead of platform_device_unregister() if platform_device_add() fail, and platform_device_del() should be used in the error handling case after platform_device_add() success. Signed-off-by: Wei Yongjun <[email protected]> Cc: Evgeniy Polyakov <[email protected]> Cc: Greg KH <[email protected]> Cc: Neil Brown <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30drivers/w1/slaves/w1_ds2780.c: fix the error handling in w1_ds2780_add_slave()Wei Yongjun1-1/+2
Use platform_device_put() instead of platform_device_unregister() if platform_device_add() fail, and platform_device_del() should be used in the error handling case after platform_device_add() success. Signed-off-by: Wei Yongjun <[email protected]> Cc: Evgeniy Polyakov <[email protected]> Cc: Greg KH <[email protected]> Cc: Neil Brown <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30drivers/w1/slaves/w1_bq27000.c: fix the error handling in w1_bq27000_add_slave()Wei Yongjun1-1/+3
Use platform_device_put() instead of platform_device_unregister() if platform_device_add() fails, and also add the return value check of platform_device_add_data(). Signed-off-by: Wei Yongjun <[email protected]> Cc: Evgeniy Polyakov <[email protected]> Cc: Greg KH <[email protected]> Cc: Neil Brown <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30drivers/memstick/host/r592.c: make r592_pm_ops staticJingoo Han1-5/+3
r592_pm_ops is not exported. Also, CONFIG_PM_SLEEP is used to remove unnecessary ifdefs. Signed-off-by: Jingoo Han <[email protected]> Cc: Maxim Levitsky <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30semaphore: use `bool' type for semaphore_waiter's upliguang1-3/+3
Signed-off-by: liguang <[email protected]> Cc: Jiri Kosina <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30semaphore: use unlikely() for down's timeoutliguang1-1/+1
Signed-off-by: liguang <[email protected]> Cc: Jiri Kosina <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30pps: pps_kc_hardpps_lock can be staticFengguang Wu1-3/+3
drivers/pps/kc.c:37:1: sparse: symbol 'pps_kc_hardpps_lock' was not declared. Should it be static? drivers/pps/kc.c:39:19: sparse: symbol 'pps_kc_hardpps_dev' was not declared. Should it be static? drivers/pps/kc.c:40:5: sparse: symbol 'pps_kc_hardpps_mode' was not declared. Should it be static? Signed-off-by: Fengguang Wu <[email protected]> Cc: Rodolfo Giometti <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30pps: hide more configuration symbols behind CONFIG_PPSFlorian Fainelli1-2/+4
Make CONFIG_PPS_DEBUG and CONFIG_NTP_PPS be hidden if CONFIG_PPS is not selected, so that we are not prompted for these configuration options if CONFIG_PPS is not set. Signed-off-by: Florian Fainelli <[email protected]> Cc: Rodolfo Giometti <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30aoe: replace kmalloc and then memcpy with kmemdupMihnea Dobrescu-Balaur1-2/+1
Signed-off-by: Mihnea Dobrescu-Balaur <[email protected]> Cc: Ed Cashin <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30nbd: increase default and max request sizesMichal Belczyk1-0/+2
Raise the default max request size for nbd to 128KB (from 127KB) to get it 4KB aligned. This patch also allows the max request size to be increased (via /sys/block/nbd<x>/queue/max_sectors_kb) to 32MB. The patch makes nbd network traffic more efficient by: - reducing request fragmentation (4KB alignment) - reducing the number of requests (fewer round trips, less network overhead) Especially in high latency networks, larger request size can make a dramatic Signed-off-by: Paul Clements <[email protected]> Signed-off-by: Michal Belczyk <[email protected]> Cc: Jens Axboe <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30pid_namespace.c/.h: simplify definesRaphael S.Carvalho3-6/+3
Move BITS_PER_PAGE from pid_namespace.c to pid_namespace.h, since we can simplify the define PID_MAP_ENTRIES by using the BITS_PER_PAGE. [[email protected]: kernel/pid.c:54:1: warning: "BITS_PER_PAGE" redefined] Signed-off-by: Raphael S.Carvalho <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30kernel/pid.c: improve flow of a loop inside alloc_pidmap.Raphael S. Carvalho1-2/+6
find_next_offset() searches for an available "cleaned bit" in the respective pid bitmap (page), so returns the offset if found, otherwise it returns a value equals to BITS_PER_PAGE. For example, suppose find_next_offset didn't find any available bit, so there's no purpose to call mk_pid (Wasteful Cpu Cycles). Therefore, I found it could be better to call mk_pid after the checking (offset < BITS_PER_PAGE) returned sucessfully! Another point: If (offset < BITS_PER_PAGE) results in a "failure", then mk_pid would be called again afterwards. [[email protected]: simplify code] Signed-off-by: Raphael S. Carvalho <[email protected]> Cc: "Eric W. Biederman" <[email protected]> Cc: Serge Hallyn <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30rbtree_test: add __init/__exit annotationsDavidlohr Bueso1-2/+2
Signed-off-by: Davidlohr Bueso <[email protected]> Reviewed-by: Michel Lespinasse <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30rbtree_test: add extra rbtree integrity checkDavidlohr Bueso1-2/+3
Account for the rbtree having 2**bh(v)-1 internal nodes. While this can be seen as a consequence of other checks, Michel states that it nicely sums up what the other properties are for. Signed-off-by: Davidlohr Bueso <[email protected]> Reviewed-by: Michel Lespinasse <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30kexec: Use min() and min_t() to simplify logicZhang Yanfei1-16/+8
Simplify the logic of variable assignments. [[email protected]: replace min_t with min, remove unneeded casts] Signed-off-by: Zhang Yanfei <[email protected]> Cc: "Eric W. Biederman" <[email protected]> Reviewed-by: Simon Horman <[email protected]> Cc: Joe Perches <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30kexec: fix wrong types of some local variablesZhang Yanfei1-3/+3
The types of the following local variables: - ubytes/mbytes in kimage_load_crash_segment()/kimage_load_normal_segment() - r in vmcoreinfo_append_str() are wrong, so fix them. Signed-off-by: Zhang Yanfei <[email protected]> Cc: "Eric W. Biederman" <[email protected]> Cc: Simon Horman <[email protected]> Cc: Joe Perches <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30exec: do not abuse ->cred_guard_mutex in threadgroup_lock()Oleg Nesterov2-14/+7
threadgroup_lock() takes signal->cred_guard_mutex to ensure that thread_group_leader() is stable. This doesn't look nice, the scope of this lock in do_execve() is huge. And as Dave pointed out this can lead to deadlock, we have the following dependencies: do_execve: cred_guard_mutex -> i_mutex cgroup_mount: i_mutex -> cgroup_mutex attach_task_by_pid: cgroup_mutex -> cred_guard_mutex Change de_thread() to take threadgroup_change_begin() around the switch-the-leader code and change threadgroup_lock() to avoid ->cred_guard_mutex. Note that de_thread() can't sleep with ->group_rwsem held, this can obviously deadlock with the exiting leader if the writer is active, so it does threadgroup_change_end() before schedule(). Reported-by: Dave Jones <[email protected]> Acked-by: Tejun Heo <[email protected]> Acked-by: Li Zefan <[email protected]> Signed-off-by: Oleg Nesterov <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30set_task_comm: kill the pointless memset() + wmb()Oleg Nesterov1-10/+0
set_task_comm() does memset() + wmb() before strlcpy(). This buys nothing and to add to the confusion, the comment is wrong. - We do not need memset() to be "safe from non-terminating string reads", the final char is always zero and we never change it. - wmb() is paired with nothing, it cannot prevent from printing the mixture of the old/new data unless the reader takes the lock. Signed-off-by: Oleg Nesterov <[email protected]> Cc: Andi Kleen <[email protected]> Cc: John Stultz <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30fs, proc: truncate /proc/pid/comm writes to first TASK_COMM_LEN bytesDavid Rientjes1-3/+2
Currently, a write to a procfs file will return the number of bytes successfully written. If the actual string is longer than this, the remainder of the string will not be be written and userspace will complete the operation by issuing additional write()s. Hence $ echo -n "abcdefghijklmnopqrs" > /proc/self/comm results in $ cat /proc/$$/comm pqrs since the final four bytes were written with a second write() since TASK_COMM_LEN == 16. This is obviously an undesired result and not equivalent to prctl(PR_SET_NAME). The implementation should not need to know the definition of TASK_COMM_LEN. This patch truncates the string to the first TASK_COMM_LEN bytes and returns the bytes written as the length of the string written so the second write() is suppressed. $ cat /proc/$$/comm abcdefghijklmno Signed-off-by: David Rientjes <[email protected]> Acked-by: John Stultz <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30coredump: change wait_for_dump_helpers() to use wait_event_interruptible()Oleg Nesterov1-6/+9
wait_for_dump_helpers() calls wake_up/kill_fasync from inside the wait_event-like loop. This is not needed and in fact this is not strictly correct, we can/should do this only once after we change pipe->writers. We could even check if it becomes zero. Change this code to use use wait_event_interruptible(), this can also help to make this wait freezable. With this patch we check pipe->readers without pipe_lock(), this is fine. Once we see pipe->readers == 1 we know that the handler decremented the counter, this is all we need. Signed-off-by: Oleg Nesterov <[email protected]> Acked-by: Mandeep Singh Baines <[email protected]> Cc: Neil Horman <[email protected]> Cc: "Rafael J. Wysocki" <[email protected]> Cc: Tejun Heo <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-04-30coredump: factor out the setting of PF_DUMPCOREOleg Nesterov5-6/+2
Cleanup. Every linux_binfmt->core_dump() sets PF_DUMPCORE, move this into zap_threads() called by do_coredump(). Signed-off-by: Oleg Nesterov <[email protected]> Acked-by: Mandeep Singh Baines <[email protected]> Cc: Neil Horman <[email protected]> Cc: "Rafael J. Wysocki" <[email protected]> Cc: Tejun Heo <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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