linux-kernel - [PATCH 1/3] slub: Fix signedness warnings

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Date:	Wed, 29 Sep 2010 21:02:13 +0900
From:	Namhyung Kim <namhyung@...il.com>
To:	Christoph Lameter <cl@...ux-foundation.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Matt Mackall <mpm@...enic.com>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] slub: Fix signedness warnings

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@...il.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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