The patch titled
Subject: mm/slub.c: drop lockdep_assert_held() from put_map()
has been added to the -mm tree. Its filename is
slub-drop-lockdep_assert_held-from-put_map.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/slub-drop-lockdep_assert_held-from-put_map.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/slub-drop-lockdep_assert_held-from-put_map.patch
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------------------------------------------------------
From: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Subject: mm/slub.c: drop lockdep_assert_held() from put_map()
There is no point in using lockdep_assert_held() unlock that is about to
be unlocked. It works only with lockdep and lockdep will complain if
spin_unlock() is used on a lock that has not been locked.
Remove superfluous lockdep_assert_held().
Link: http://lkml.kernel.org/r/20200618201234.795692-2-bigeasy@xxxxxxxxxxxxx
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Cc: Yu Zhao <yuzhao@xxxxxxxxxx>
Cc: Christopher Lameter <cl@xxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/slub.c | 2 --
1 file changed, 2 deletions(-)
--- a/mm/slub.c~slub-drop-lockdep_assert_held-from-put_map
+++ a/mm/slub.c
@@ -473,8 +473,6 @@ static unsigned long *get_map(struct kme
static void put_map(unsigned long *map) __releases(&object_map_lock)
{
VM_BUG_ON(map != object_map);
- lockdep_assert_held(&object_map_lock);
-
spin_unlock(&object_map_lock);
}
_
Patches currently in -mm which might be from bigeasy@xxxxxxxxxxxxx are
slub-cure-list_slab_objects-from-double-fix.patch
slub-drop-lockdep_assert_held-from-put_map.patch
