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Commit e3b5a342 authored by Tetsuo Handa's avatar Tetsuo Handa Committed by Linus Torvalds
Browse files

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

while_each_pid_thread() is using while_each_thread(), which is unsafe
under RCU lock according to commit 0c740d0a ("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: default avatarTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 369f2679

include/linux/pid.h

+2 −2
Original line number Diff line number Diff line
@@ -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 */