GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-27 09:02:06 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

[PATCH] cpuset: task_lock comment fix

Browse source 
Fix cpuset comment involving case of a tasks cpuset pointer being NULL.
Thanks to "the_top_cpuset_hack", this code no longer sees NULL task->cpuset
pointers.

Signed-off-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Paul Jackson 2006-03-31 02:30:50 -08:00 • committed by Linus Torvalds
parent 2cf8d82d63
commit 4a01c8d5be
1 changed files with 4 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

10
kernel/cpuset.c
View file

@ -616,12 +616,10 @@ static void guarantee_online_mems(const struct cpuset *cs, nodemask_t *pmask)
* current->cpuset if a task has its memory placement changed. * current->cpuset if a task has its memory placement changed.
* Do not call this routine if in_interrupt(). * Do not call this routine if in_interrupt().
* *
* Call without callback_mutex or task_lock() held. May be called * Call without callback_mutex or task_lock() held. May be
* with or without manage_mutex held. Doesn't need task_lock to guard * called with or without manage_mutex held. Thanks in part to
* against another task changing a non-NULL cpuset pointer to NULL, * 'the_top_cpuset_hack', the tasks cpuset pointer will never
* as that is only done by a task on itself, and if the current task * be NULL. This routine also might acquire callback_mutex and
* is here, it is not simultaneously in the exit code NULL'ing its
* cpuset pointer. This routine also might acquire callback_mutex and
* current->mm->mmap_sem during call. * current->mm->mmap_sem during call.
* *
* Reading current->cpuset->mems_generation doesn't need task_lock * Reading current->cpuset->mems_generation doesn't need task_lock