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include/linux/pid.h: use for_each_thread() in do_each_pid_thread()

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while_each_pid_thread() is using while_each_thread(), which is unsafe
under RCU lock according to commit 0c740d0afc ("introduce
for_each_thread() to replace the buggy while_each_thread()").  Use
for_each_thread() in do_each_pid_thread() which is safe under RCU lock.

Link: http://lkml.kernel.org/r/201702011947.DBD56740.OMVHOLOtSJFFFQ@I-love.SAKURA.ne.jp
Link: http://lkml.kernel.org/r/1486041779-4401-2-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Tetsuo Handa 2017-02-27 14:27:37 -08:00 committed by Linus Torvalds
parent 369f2679f7
commit e3b5a342ab
1 changed files with 2 additions and 2 deletions
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4
include/linux/pid.h
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@ -191,10 +191,10 @@ pid_t pid_vnr(struct pid *pid);
#define do_each_pid_thread(pid, type, task) \
do_each_pid_task(pid, type, task) { \
struct task_struct *tg___ = task; \
do {
for_each_thread(tg___, task) {
#define while_each_pid_thread(pid, type, task) \
} while_each_thread(tg___, task); \
} \
task = tg___; \
} while_each_pid_task(pid, type, task)
#endif /* _LINUX_PID_H */