Commit d1209d04 authored by Alan Stern's avatar Alan Stern Committed by Linus Torvalds
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[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: default avatarAlan Stern <>
Acked-by: Pavel Machek's avatarPavel Machek <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent f9b25fab
......@@ -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;
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