* [PATCH] mm/mmu_notifier: fix deadlock from typo vm_lock_anon_vma()
@ 2017-08-08 22:57 jglisse
2017-08-09 6:14 ` Davidlohr Bueso
0 siblings, 1 reply; 2+ messages in thread
From: jglisse @ 2017-08-08 22:57 UTC (permalink / raw)
To: linux-mm
Cc: linux-kernel, Jérôme Glisse, Davidlohr Bueso,
Andrew Morton
From: JA(C)rA'me Glisse <jglisse@redhat.com>
Fix typo introduced by 0c67e6038580e343bd5af12b7ac6548634f05f0d
which result in dead lock when mm_take_all_locks() is call (only
user being mmu_notifier at this time)
Signed-off-by: JA(C)rA'me Glisse <jglisse@redhat.com>
Cc: Davidlohr Bueso <dbueso@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
---
mm/mmap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/mmap.c b/mm/mmap.c
index 74abfd382478..2d906a8f67ac 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -3314,7 +3314,7 @@ static DEFINE_MUTEX(mm_all_locks_mutex);
static void vm_lock_anon_vma(struct mm_struct *mm, struct anon_vma *anon_vma)
{
- if (!test_bit(0, (unsigned long *) &anon_vma->rb_root.rb_root.rb_node)) {
+ if (!test_bit(0, (unsigned long *) &anon_vma->root->rb_root.rb_root.rb_node)) {
/*
* The LSB of head.next can't change from under us
* because we hold the mm_all_locks_mutex.
--
2.13.4
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^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] mm/mmu_notifier: fix deadlock from typo vm_lock_anon_vma()
2017-08-08 22:57 [PATCH] mm/mmu_notifier: fix deadlock from typo vm_lock_anon_vma() jglisse
@ 2017-08-09 6:14 ` Davidlohr Bueso
0 siblings, 0 replies; 2+ messages in thread
From: Davidlohr Bueso @ 2017-08-09 6:14 UTC (permalink / raw)
To: jglisse; +Cc: linux-mm, linux-kernel, Andrew Morton
Thanks!
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2017-08-08 22:57 [PATCH] mm/mmu_notifier: fix deadlock from typo vm_lock_anon_vma() jglisse
2017-08-09 6:14 ` Davidlohr Bueso
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