[PATCH 1/3] slub: Fix signedness warnings

[PATCH 1/3] slub: Fix signedness warnings

[Namhyung Kim]

The bit-ops routines require its arg to be a pointer to unsigned long.
This leads sparse to complain about different signedness as follows:

 mm/slub.c:2425:49: warning: incorrect type in argument 2 (different signedness)
 mm/slub.c:2425:49:    expected unsigned long volatile *addr
 mm/slub.c:2425:49:    got long *map

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
---
 mm/slub.c |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
index 13fffe1..e137688 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2414,9 +2414,8 @@ static void list_slab_objects(struct kmem_cache *s, struct page *page,
 #ifdef CONFIG_SLUB_DEBUG
 	void *addr = page_address(page);
 	void *p;
-	long *map = kzalloc(BITS_TO_LONGS(page->objects) * sizeof(long),
-			    GFP_ATOMIC);
-
+	unsigned long *map = kzalloc(BITS_TO_LONGS(page->objects) *
+				     sizeof(long), GFP_ATOMIC);
 	if (!map)
 		return;
 	slab_err(s, page, "%s", text);
@@ -3635,7 +3634,7 @@ static int add_location(struct loc_track *t, struct kmem_cache *s,
 
 static void process_slab(struct loc_track *t, struct kmem_cache *s,
 		struct page *page, enum track_item alloc,
-		long *map)
+		unsigned long *map)
 {
 	void *addr = page_address(page);
 	void *p;
-- 
1.7.2.2

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[PATCH 2/3] slub: Add lock release annotation

[Namhyung Kim]

The unfreeze_slab() releases page's PG_locked bit but was missing
proper annotation. The deactivate_slab() needs to be marked also
since it calls unfreeze_slab() without grabbing the lock.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
---
 mm/slub.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
index e137688..f0684a9 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1405,6 +1405,7 @@ static struct page *get_partial(struct kmem_cache *s, gfp_t flags, int node)
  * On exit the slab lock will have been dropped.
  */
 static void unfreeze_slab(struct kmem_cache *s, struct page *page, int tail)
+	__releases(bitlock)
 {
 	struct kmem_cache_node *n = get_node(s, page_to_nid(page));
 
@@ -1447,6 +1448,7 @@ static void unfreeze_slab(struct kmem_cache *s, struct page *page, int tail)
  * Remove the cpu slab
  */
 static void deactivate_slab(struct kmem_cache *s, struct kmem_cache_cpu *c)
+	__releases(bitlock)
 {
 	struct page *page = c->page;
 	int tail = 1;
-- 
1.7.2.2

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Re: [PATCH 2/3] slub: Add lock release annotation

[David Rientjes]

On Wed, 29 Sep 2010, Namhyung Kim wrote:

> The unfreeze_slab() releases page's PG_locked bit but was missing
> proper annotation. The deactivate_slab() needs to be marked also
> since it calls unfreeze_slab() without grabbing the lock.

unfreeze_slab() needs it because it calls deactivate_slab() 
unconditionally, rather.

> Signed-off-by: Namhyung Kim <namhyung@gmail.com>

Acked-by: David Rientjes <rientjes@google.com>

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[PATCH 3/3] slub: Move NUMA-related functions under CONFIG_NUMA

[Namhyung Kim]

Make kmalloc_cache_alloc_node_notrace(), kmalloc_large_node()
and __kmalloc_node_track_caller() to be compiled only when
CONFIG_NUMA is selected.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
---
 mm/slub.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
index f0684a9..4abc186 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1756,7 +1756,6 @@ void *kmem_cache_alloc_node(struct kmem_cache *s, gfp_t gfpflags, int node)
 	return ret;
 }
 EXPORT_SYMBOL(kmem_cache_alloc_node);
-#endif
 
 #ifdef CONFIG_TRACING
 void *kmem_cache_alloc_node_notrace(struct kmem_cache *s,
@@ -1767,6 +1766,7 @@ void *kmem_cache_alloc_node_notrace(struct kmem_cache *s,
 }
 EXPORT_SYMBOL(kmem_cache_alloc_node_notrace);
 #endif
+#endif
 
 /*
  * Slow patch handling. This may still be called frequently since objects
@@ -2736,6 +2736,7 @@ void *__kmalloc(size_t size, gfp_t flags)
 }
 EXPORT_SYMBOL(__kmalloc);
 
+#ifdef CONFIG_NUMA
 static void *kmalloc_large_node(size_t size, gfp_t flags, int node)
 {
 	struct page *page;
@@ -2750,7 +2751,6 @@ static void *kmalloc_large_node(size_t size, gfp_t flags, int node)
 	return ptr;
 }
 
-#ifdef CONFIG_NUMA
 void *__kmalloc_node(size_t size, gfp_t flags, int node)
 {
 	struct kmem_cache *s;
@@ -3319,6 +3319,7 @@ void *__kmalloc_track_caller(size_t size, gfp_t gfpflags, unsigned long caller)
 	return ret;
 }
 
+#ifdef CONFIG_NUMA
 void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
 					int node, unsigned long caller)
 {
@@ -3347,6 +3348,7 @@ void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
 
 	return ret;
 }
+#endif
 
 #ifdef CONFIG_SLUB_DEBUG
 static int count_inuse(struct page *page)
-- 
1.7.2.2

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Re: [PATCH 3/3] slub: Move NUMA-related functions under CONFIG_NUMA

[David Rientjes]

On Wed, 29 Sep 2010, Namhyung Kim wrote:

> Make kmalloc_cache_alloc_node_notrace(), kmalloc_large_node()
> and __kmalloc_node_track_caller() to be compiled only when
> CONFIG_NUMA is selected.
> 
> Signed-off-by: Namhyung Kim <namhyung@gmail.com>

Acked-by: David Rientjes <rientjes@google.com>

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Re: [PATCH 1/3] slub: Fix signedness warnings

[Christoph Lameter]

On Wed, 29 Sep 2010, Namhyung Kim wrote:

> The bit-ops routines require its arg to be a pointer to unsigned long.
> This leads sparse to complain about different signedness as follows:

Acked-by: Christoph Lameter <cl@linux.com>

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Re: [PATCH 1/3] slub: Fix signedness warnings

[David Rientjes]

On Wed, 29 Sep 2010, Namhyung Kim wrote:

> The bit-ops routines require its arg to be a pointer to unsigned long.
> This leads sparse to complain about different signedness as follows:
> 
>  mm/slub.c:2425:49: warning: incorrect type in argument 2 (different signedness)
>  mm/slub.c:2425:49:    expected unsigned long volatile *addr
>  mm/slub.c:2425:49:    got long *map
> 
> Signed-off-by: Namhyung Kim <namhyung@gmail.com>

Acked-by: David Rientjes <rientjes@google.com>

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Re: [PATCH 1/3] slub: Fix signedness warnings

[Pekka Enberg]

On 29.9.2010 15.02, Namhyung Kim wrote:
> The bit-ops routines require its arg to be a pointer to unsigned long.
> This leads sparse to complain about different signedness as follows:
>
>   mm/slub.c:2425:49: warning: incorrect type in argument 2 (different signedness)
>   mm/slub.c:2425:49:    expected unsigned long volatile *addr
>   mm/slub.c:2425:49:    got long *map
>
> Signed-off-by: Namhyung Kim<namhyung@gmail.com>

The series has been applied. Thanks!

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