[PATCH 16/23] slub: make ->object_size unsigned int

[Alexey Dobriyan <adobriyan@gmail.com>]

Linux doesn't support negative length objects in kmem caches.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---
 include/linux/slub_def.h | 2 +-
 mm/slab_common.c         | 2 +-
 mm/slub.c                | 8 ++++----
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index 94f1228f2f41..b9d1f0ef1335 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -85,7 +85,7 @@ struct kmem_cache {
 	slab_flags_t flags;
 	unsigned long min_partial;
 	int size;		/* The size of an object including meta data */
-	int object_size;	/* The size of an object without meta data */
+	unsigned int object_size;/* The size of an object without meta data */
 	unsigned int offset;	/* Free pointer offset. */
 #ifdef CONFIG_SLUB_CPU_PARTIAL
 	/* Number of per cpu partial objects to keep around */
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 1cec6225fc4c..2b5435e1e619 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -94,7 +94,7 @@ static int kmem_cache_sanity_check(const char *name, unsigned int size)
 		 */
 		res = probe_kernel_address(s->name, tmp);
 		if (res) {
-			pr_err("Slab cache with size %d has lost its name\n",
+			pr_err("Slab cache with size %u has lost its name\n",
 			       s->object_size);
 			continue;
 		}
diff --git a/mm/slub.c b/mm/slub.c
index 61218ecc0ea7..4e09dabb89da 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -680,7 +680,7 @@ static void print_trailer(struct kmem_cache *s, struct page *page, u8 *p)
 		print_section(KERN_ERR, "Bytes b4 ", p - 16, 16);
 
 	print_section(KERN_ERR, "Object ", p,
-		      min_t(unsigned long, s->object_size, PAGE_SIZE));
+		      min_t(unsigned int, s->object_size, PAGE_SIZE));
 	if (s->flags & SLAB_RED_ZONE)
 		print_section(KERN_ERR, "Redzone ", p + s->object_size,
 			s->inuse - s->object_size);
@@ -2398,7 +2398,7 @@ slab_out_of_memory(struct kmem_cache *s, gfp_t gfpflags, int nid)
 
 	pr_warn("SLUB: Unable to allocate memory on node %d, gfp=%#x(%pGg)\n",
 		nid, gfpflags, &gfpflags);
-	pr_warn("  cache: %s, object size: %d, buffer size: %d, default order: %d, min order: %d\n",
+	pr_warn("  cache: %s, object size: %u, buffer size: %d, default order: %d, min order: %d\n",
 		s->name, s->object_size, s->size, oo_order(s->oo),
 		oo_order(s->min));
 
@@ -4236,7 +4236,7 @@ __kmem_cache_alias(const char *name, unsigned int size, unsigned int align,
 		 * Adjust the object sizes so that we clear
 		 * the complete object on kzalloc.
 		 */
-		s->object_size = max(s->object_size, (int)size);
+		s->object_size = max(s->object_size, size);
 		s->inuse = max(s->inuse, ALIGN(size, sizeof(void *)));
 
 		for_each_memcg_cache(c, s) {
@@ -4882,7 +4882,7 @@ SLAB_ATTR_RO(align);
 
 static ssize_t object_size_show(struct kmem_cache *s, char *buf)
 {
-	return sprintf(buf, "%d\n", s->object_size);
+	return sprintf(buf, "%u\n", s->object_size);
 }
 SLAB_ATTR_RO(object_size);
 
-- 
2.13.6

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