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| author | Lai Jiangshan <[email protected]> | 2008-10-04 20:51:15 +0000 |
|---|---|---|
| committer | Alexey Dobriyan <[email protected]> | 2008-10-10 00:18:57 +0000 |
| commit | a6bebbc87a8c16eabb6bd5c6fd2d994be0236fba (patch) | |
| tree | 3e617ca49063f3a12c982da5d6c687882a1b4070 /lib/parser.c | |
| parent | proc: move PROC_PAGE_MONITOR to fs/proc/Kconfig (diff) | |
| download | kernel-a6bebbc87a8c16eabb6bd5c6fd2d994be0236fba.tar.gz kernel-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 <[email protected]>
[ok from Oleg]
Signed-off-by: Alexey Dobriyan <[email protected]>
Diffstat (limited to 'lib/parser.c')
0 files changed, 0 insertions, 0 deletions