ich777/linux_media
1
0
Fork 0
mirror of https://github.com/tbsdtv/linux_media.git synced 2025-07-23 04:33:26 +02:00
Code Issues Packages Projects Releases Wiki Activity

task_work: Introduce task_work_pending

Browse Source 
Wrap the test of task->task_works in a helper function to make
it clear what is being tested.

All of the other readers of task->task_work use READ_ONCE and this is
even necessary on current as other processes can update
task->task_work.  So for consistency I have added READ_ONCE into
task_work_pending.

Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lkml.kernel.org/r/20220309162454.123006-7-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman
2022-02-09 08:52:41 -06:00
parent 8ca07e17c9
commit 7f62d40d9c
5 changed files with 13 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
kernel/task_work.c
View File

@@ -78,7 +78,7 @@ task_work_cancel_match(struct task_struct *task,
struct callback_head *work;
unsigned long flags;
if (likely(!task->task_works))
if (likely(!task_work_pending(task)))
return NULL;
/*
* If cmpxchg() fails we continue without updating pprev.