From d1209d049bbc3df66650f8417637be4f7b57b604 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Wed, 19 Oct 2005 21:23:51 -0700 Subject: [PATCH] [PATCH] Threads shouldn't inherit PF_NOFREEZE The PF_NOFREEZE process flag should not be inherited when a thread is forked. This patch (as585) removes the flag from the child. This problem is starting to show up more and more as drivers turn to the kthread API instead of using kernel_thread(). As a result, their kernel threads are now children of the kthread worker instead of modprobe, and they inherit the PF_NOFREEZE flag. This can cause problems during system suspend; the kernel threads are not getting frozen as they ought to be. Signed-off-by: Alan Stern Acked-by: Pavel Machek Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/fork.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/fork.c b/kernel/fork.c index 533ce27f4b2c..280bd44ac441 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -848,7 +848,7 @@ static inline void copy_flags(unsigned long clone_flags, struct task_struct *p) { unsigned long new_flags = p->flags; - new_flags &= ~PF_SUPERPRIV; + new_flags &= ~(PF_SUPERPRIV | PF_NOFREEZE); new_flags |= PF_FORKNOEXEC; if (!(clone_flags & CLONE_PTRACE)) p->ptrace = 0; -- 2.20.1