The patch titled
Subject: mm: move helper to check slub_debug_enabled
has been added to the -mm tree. Its filename is
mm-move-helper-to-check-slub_debug_enabled.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-move-helper-to-check-slub_debug_enabled.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-move-helper-to-check-slub_debug_enabled.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Marco Elver <elver@xxxxxxxxxx>
Subject: mm: move helper to check slub_debug_enabled
Move the helper to check slub_debug_enabled, so that we can confine the
use of #ifdef outside slub.c as well.
Link: https://lkml.kernel.org/r/20210705103229.8505-2-yee.lee@xxxxxxxxxxxx
Signed-off-by: Marco Elver <elver@xxxxxxxxxx>
Signed-off-by: Yee Lee <yee.lee@xxxxxxxxxxxx>
Suggested-by: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>
Cc: Chinwen Chang <chinwen.chang@xxxxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Kuan-Ying Lee <Kuan-Ying.Lee@xxxxxxxxxxxx>
Cc: Nicholas Tang <nicholas.tang@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/slab.h | 15 +++++++++++----
mm/slub.c | 14 --------------
2 files changed, 11 insertions(+), 18 deletions(-)
--- a/mm/slab.h~mm-move-helper-to-check-slub_debug_enabled
+++ a/mm/slab.h
@@ -216,10 +216,18 @@ DECLARE_STATIC_KEY_FALSE(slub_debug_enab
#endif
extern void print_tracking(struct kmem_cache *s, void *object);
long validate_slab_cache(struct kmem_cache *s);
+static inline bool __slub_debug_enabled(void)
+{
+ return static_branch_unlikely(&slub_debug_enabled);
+}
#else
static inline void print_tracking(struct kmem_cache *s, void *object)
{
}
+static inline bool __slub_debug_enabled(void)
+{
+ return false;
+}
#endif
/*
@@ -229,11 +237,10 @@ static inline void print_tracking(struct
*/
static inline bool kmem_cache_debug_flags(struct kmem_cache *s, slab_flags_t flags)
{
-#ifdef CONFIG_SLUB_DEBUG
- VM_WARN_ON_ONCE(!(flags & SLAB_DEBUG_FLAGS));
- if (static_branch_unlikely(&slub_debug_enabled))
+ if (IS_ENABLED(CONFIG_SLUB_DEBUG))
+ VM_WARN_ON_ONCE(!(flags & SLAB_DEBUG_FLAGS));
+ if (__slub_debug_enabled())
return s->flags & flags;
-#endif
return false;
}
--- a/mm/slub.c~mm-move-helper-to-check-slub_debug_enabled
+++ a/mm/slub.c
@@ -119,25 +119,11 @@
*/
#ifdef CONFIG_SLUB_DEBUG
-
#ifdef CONFIG_SLUB_DEBUG_ON
DEFINE_STATIC_KEY_TRUE(slub_debug_enabled);
#else
DEFINE_STATIC_KEY_FALSE(slub_debug_enabled);
#endif
-
-static inline bool __slub_debug_enabled(void)
-{
- return static_branch_unlikely(&slub_debug_enabled);
-}
-
-#else /* CONFIG_SLUB_DEBUG */
-
-static inline bool __slub_debug_enabled(void)
-{
- return false;
-}
-
#endif /* CONFIG_SLUB_DEBUG */
static inline bool kmem_cache_debug(struct kmem_cache *s)
_
Patches currently in -mm which might be from elver@xxxxxxxxxx are
mm-move-helper-to-check-slub_debug_enabled.patch
