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| author |   Lai Jiangshan <laijs@cn.fujitsu.com> | 2008-10-05 00:51:15 +0400 |
|---|---|---|
| committer |   Alexey Dobriyan <adobriyan@gmail.com> | 2008-10-10 04:18:57 +0400 |
| commit | a6bebbc87a8c16eabb6bd5c6fd2d994be0236fba (patch) | |
| tree | 3e617ca49063f3a12c982da5d6c687882a1b4070 /.mailmap | |
| parent | proc: move PROC_PAGE_MONITOR to fs/proc/Kconfig (diff) | |
| download | linux-dev-a6bebbc87a8c16eabb6bd5c6fd2d994be0236fba.tar.xz linux-dev-a6bebbc87a8c16eabb6bd5c6fd2d994be0236fba.zip | |
[PATCH] signal, procfs: some lock_task_sighand() users do not need rcu_read_lock()
lock_task_sighand() make sure task->sighand is being protected,
so we do not need rcu_read_lock().
[ exec() will get task->sighand->siglock before change task->sighand! ]
But code using rcu_read_lock() _just_ to protect lock_task_sighand()
only appear in procfs. (and some code in procfs use lock_task_sighand()
without such redundant protection.)
Other subsystem may put lock_task_sighand() into rcu_read_lock()
critical region, but these rcu_read_lock() are used for protecting
"for_each_process()", "find_task_by_vpid()" etc. , not for protecting
lock_task_sighand().
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
[ok from Oleg]
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Diffstat (limited to '.mailmap')
0 files changed, 0 insertions, 0 deletions