Paul E. McKenney c41247e1d4 signal: Explain local_irq_save() call ...

The explicit local_irq_save() in __lock_task_sighand() is needed to avoid
a potential deadlock condition, as noted in a841796f11 (signal:
align __lock_task_sighand() irq disabling and RCU).  However, someone
reading the code might be forgiven for concluding that this separate
local_irq_save() was completely unnecessary.  This commit therefore adds
a comment referencing the shiny new block comment on rcu_read_unlock().

Reported-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Lai Jiangshan <laijs@cn.fujitsu.com>

2014-07-09 09:14:33 -07:00

..

debug

kernel/printk: use symbolic defines for console loglevels

2014-06-04 16:54:17 -07:00

events

Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2014-06-12 19:18:49 -07:00

gcov

gcov: add support for GCC 4.9

2014-06-10 15:34:46 -07:00

irq

genirq: Improve documentation to match current implementation

2014-05-27 10:16:44 +02:00

locking

Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2014-06-12 18:48:15 -07:00

power

Merge branch 'pm-sleep'

2014-06-12 13:43:08 +02:00

printk

kernel/printk: use symbolic defines for console loglevels

2014-06-04 16:54:17 -07:00

rcu

rcu: Reduce overhead of cond_resched() checks for RCU

2014-06-23 11:19:32 -07:00

sched

rcu: Reduce overhead of cond_resched() checks for RCU

2014-06-23 11:19:32 -07:00

time

Merge branch 'akpm' (patchbomb from Andrew) into next

2014-06-04 16:55:13 -07:00

trace

Merge tag 'trace-3.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2014-06-12 21:07:25 -07:00

.gitignore

Ignore generated file kernel/x509_certificate_list

2013-12-10 18:21:34 +00:00

acct.c

ipc, kernel: clear whitespace

2014-06-06 16:08:14 -07:00

async.c

async: rename and redefine async_func_ptr

2013-03-12 13:59:14 -07:00

audit_tree.c

inotify: Fix reporting of cookies for inotify events

2014-02-18 11:17:17 +01:00

audit_watch.c

inotify: Fix reporting of cookies for inotify events

2014-02-18 11:17:17 +01:00

audit.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

2014-06-12 14:27:40 -07:00

audit.h

audit: Use struct net not pid_t to remember the network namespce to reply in

2014-03-20 10:10:53 -04:00

auditfilter.c

Merge git://git.infradead.org/users/eparis/audit

2014-04-12 12:38:53 -07:00

auditsc.c

auditsc: audit_krule mask accesses need bounds checking

2014-06-10 08:44:40 -07:00

backtracetest.c

kernel/backtracetest.c: replace no level printk by pr_info()

2014-06-04 16:54:14 -07:00

bounds.c

mm: do not allocate page->ptl dynamically, if spinlock_t fits to long

2013-12-20 12:25:45 -08:00

capability.c

fs,userns: Change inode_capable to capable_wrt_inode_uidgid

2014-06-10 13:57:22 -07:00

cgroup_freezer.c

cgroup: remove css_parent()

2014-05-16 13:22:48 -04:00

cgroup.c

Merge branch 'for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2014-06-09 15:03:33 -07:00

compat.c

kernel/compat.c: use sizeof() instead of sizeof

2014-06-04 16:54:19 -07:00

configs.c

proc: Supply PDE attribute setting accessor functions

2013-05-01 17:29:18 -04:00

context_tracking.c

asmlinkage: Add explicit __visible to drivers/*, lib/*, kernel/*

2014-05-05 16:07:46 -07:00

cpu_pm.c

…

cpu.c

Merge tag 'pm+acpi-3.16-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2014-06-12 13:14:19 -07:00

cpuset.c

Merge branch 'for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2014-06-09 15:03:33 -07:00

crash_dump.c

…

cred.c

…

delayacct.c

kernel/delayacct.c: remove redundant checking in __delayacct_add_tsk()

2013-11-13 12:09:12 +09:00

dma.c

…

elfcore.c

switch elf_core_write_extra_phdrs() to dump_emit()

2013-11-09 00:16:23 -05:00

exec_domain.c

kernel/exec_domain.c: code clean-up

2014-06-04 16:54:15 -07:00

exit.c

signals: mv {dis,}allow_signal() from sched.h/exit.c to signal.[ch]

2014-06-06 16:08:11 -07:00

extable.c

asmlinkage: Make main_extable_sort_needed visible

2014-02-13 18:13:22 -08:00

fork.c

ptrace: fix fork event messages across pid namespaces

2014-06-06 16:08:11 -07:00

freezer.c

libata, freezer: avoid block device removal while system is frozen

2013-12-19 13:50:32 -05:00

futex_compat.c

compat: Get rid of (get|put)_compat_time(val|spec)

2014-02-02 14:09:12 -08:00

futex.c

Merge branch 'next' (accumulated 3.16 merge window patches) into master

2014-06-08 11:31:16 -07:00

groups.c

kernel/groups.c: remove return value of set_groups

2014-04-03 16:21:05 -07:00

hrtimer.c

Merge branch 'perf/urgent' into perf/core, to resolve conflict and to prepare for new patches

2014-06-06 07:55:06 +02:00

hung_task.c

kernel/hung_task.c: convert simple_strtoul to kstrtouint

2014-06-04 16:54:15 -07:00

irq_work.c

perf/x86: Warn to early_printk() in case irq_work is too slow

2014-02-21 21:49:07 +01:00

itimer.c

…

jump_label.c

static_key: WARN on usage before jump_label_init was called

2013-10-19 19:45:35 -04:00

kallsyms.c

kernel: use macros from compiler.h instead of __attribute__((...))

2014-04-07 16:36:11 -07:00

kcmp.c

…

Kconfig.freezer

…

Kconfig.hz

kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS

2013-11-15 09:32:22 +09:00

Kconfig.locks

locking/rwlocks: Introduce 'qrwlocks' - fair, queued rwlocks

2014-06-06 07:58:28 +02:00

Kconfig.preempt

…

kexec.c

kernel/kexec.c: convert printk to pr_foo()

2014-06-06 16:08:12 -07:00

kmod.c

signals: change wait_for_helper() to use kernel_sigaction()

2014-06-06 16:08:12 -07:00

kprobes.c

kprobes: Show blacklist entries via debugfs

2014-04-24 10:26:41 +02:00

ksysfs.c

kobject: Make support for uevent_helper optional.

2014-04-25 12:00:49 -07:00

kthread.c

kthread: fix return value of kthread_create() upon SIGKILL.

2014-06-04 16:53:51 -07:00

latencytop.c

kernel/latencytop.c: convert seq_printf to seq_puts

2014-06-04 16:54:15 -07:00

Makefile

Merge branch 'x86-asmlinkage-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2014-03-31 14:13:25 -07:00

module_signing.c

keys: change asymmetric keys to use common hash definitions

2013-10-25 17:15:18 -04:00

module-internal.h

KEYS: Separate the kernel signature checking keyring from module signing

2013-09-25 17:17:01 +01:00

module.c

Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

2014-06-11 16:09:14 -07:00

notifier.c

kprobes, notifier: Use NOKPROBE_SYMBOL macro in notifier

2014-04-24 10:26:39 +02:00

nsproxy.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2013-09-07 14:35:32 -07:00

padata.c

padata: Fix wrong usage of rcu_dereference()

2013-12-05 21:28:42 +08:00

panic.c

kernel/panic.c: add "crash_kexec_post_notifiers" option for kdump after panic_notifers

2014-06-06 16:08:12 -07:00

params.c

param: hand arguments after -- straight to init

2014-04-28 11:48:34 +09:30

pid_namespace.c

pid_namespace: pidns_get() should check task_active_pid_ns() != NULL

2014-04-02 16:20:21 -07:00

pid.c

pidns: fix free_pid() to handle the first fork failure

2013-09-30 14:31:03 -07:00

posix-cpu-timers.c

posix-timers: Convert abuses of BUG_ON to WARN_ON

2013-12-09 16:56:29 +01:00

posix-timers.c

posix-timers: Remove unused variable

2013-04-18 12:51:19 +02:00

profile.c

kernel/profile.c: use static const char instead of static char

2014-06-06 16:08:13 -07:00

ptrace.c

kernel/compat: convert to COMPAT_SYSCALL_DEFINE

2014-03-06 15:35:10 +01:00

range.c

range: Do not add new blank slot with add_range_with_merge

2013-06-18 11:32:10 -05:00

reboot.c

kernel/reboot.c: convert simple_strtoul to kstrtoint

2014-06-04 16:54:15 -07:00

relay.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2014-04-12 14:49:50 -07:00

res_counter.c

kernel/res_counter.c: replace simple_strtoull by kstrtoull

2014-06-04 16:54:15 -07:00

resource.c

resources: Clarify sanity check message

2014-05-23 10:47:21 -06:00

seccomp.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

2014-06-12 14:27:40 -07:00

signal.c

signal: Explain local_irq_save() call

2014-07-09 09:14:33 -07:00

smp.c

smp: print more useful debug info upon receiving IPI on an offline CPU

2014-06-06 16:08:12 -07:00

smpboot.c

kernel: delete __cpuinit usage from all core kernel files

2013-07-14 19:36:59 -04:00

smpboot.h

…

softirq.c

Merge branch 'rcu/next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu

2014-05-22 11:36:10 +02:00

stacktrace.c

…

stop_machine.c

kernel/stop_machine.c: kernel-doc warning fix

2014-06-04 16:54:15 -07:00

sys_ni.c

sys_sgetmask/sys_ssetmask: add CONFIG_SGETMASK_SYSCALL

2014-06-04 16:54:14 -07:00

sys.c

sched: Consolidate open coded implementations of nice level frobbing into nice_to_rlimit() and rlimit_to_nice()

2014-05-22 11:16:36 +02:00

sysctl_binary.c

kernel/sysctl_binary.c: use scnprintf() instead of snprintf()

2013-11-13 12:09:33 +09:00

sysctl.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

2014-06-12 14:27:40 -07:00

system_certificates.S

KEYS: correct alignment of system_certificate_list content in assembly file

2013-12-10 18:25:28 +00:00

system_keyring.c

KEYS: correct alignment of system_certificate_list content in assembly file

2013-12-10 18:25:28 +00:00

task_work.c

task_work: documentation

2013-09-11 15:58:27 -07:00

taskstats.c

genetlink: only pass array to genl_register_family_with_ops()

2013-11-19 16:39:05 -05:00

test_kprobes.c

kernel/: rename random32() to prandom_u32()

2013-04-29 18:28:42 -07:00

time.c

sched: Rename sched.c as sched/core.c in comments and Documentation

2013-06-19 12:58:42 +02:00

timeconst.bc

…

timer.c

timer: Prevent overflow in apply_slack

2014-04-30 13:46:17 +02:00

torture.c

torture: Remove __init from torture_init_begin/end

2014-05-14 09:46:30 -07:00

tracepoint.c

kernel/tracepoint.c: kernel-doc fixes

2014-06-04 16:54:15 -07:00

tsacct.c

…

uid16.c

userns: Kill nsown_capable it makes the wrong thing easy

2013-08-30 23:44:11 -07:00

up.c

smp: Rename __smp_call_function_single() to smp_call_function_single_async()

2014-02-24 14:47:15 -08:00

user_namespace.c

kernel/user_namespace.c: kernel-doc/checkpatch fixes

2014-06-06 16:08:13 -07:00

user-return-notifier.c

hlist: drop the node parameter from iterators

2013-02-27 19:10:24 -08:00

user.c

kernel/user.c: drop unused field 'files' from user_struct

2014-06-04 16:54:16 -07:00

utsname_sysctl.c

sysctl: convert use of typedef ctl_table to struct ctl_table

2014-06-06 16:08:16 -07:00

utsname.c

userns: Kill nsown_capable it makes the wrong thing easy

2013-08-30 23:44:11 -07:00

watchdog.c

kernel/watchdog.c:touch_softlockup_watchdog(): use raw_cpu_write()

2014-04-18 16:40:08 -07:00

workqueue_internal.h

workqueue: rename manager_mutex to attach_mutex

2014-05-20 10:59:32 -04:00

workqueue.c

Merge branch 'for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

2014-06-09 14:56:49 -07:00