[patch 043/119] slub: make ->reserved unsigned int

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From: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Subject: slub: make ->reserved unsigned int

->reserved is either 0 or sizeof(struct rcu_head), can't be negative.

Link: http://lkml.kernel.org/r/20180305200730.15812-12-adobriyan@xxxxxxxxx
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Acked-by: Christoph Lameter <cl@xxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 include/linux/slub_def.h |    2 +-
 mm/slub.c                |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff -puN include/linux/slub_def.h~slub-make-reserved-unsigned-int include/linux/slub_def.h
--- a/include/linux/slub_def.h~slub-make-reserved-unsigned-int
+++ a/include/linux/slub_def.h
@@ -100,7 +100,7 @@ struct kmem_cache {
 	void (*ctor)(void *);
 	int inuse;		/* Offset to metadata */
 	int align;		/* Alignment */
-	int reserved;		/* Reserved bytes at the end of slabs */
+	unsigned int reserved;		/* Reserved bytes at the end of slabs */
 	unsigned int red_left_pad;	/* Left redzone padding size */
 	const char *name;	/* Name (only for display!) */
 	struct list_head list;	/* List of slab caches */
diff -puN mm/slub.c~slub-make-reserved-unsigned-int mm/slub.c
--- a/mm/slub.c~slub-make-reserved-unsigned-int
+++ a/mm/slub.c
@@ -5094,7 +5094,7 @@ SLAB_ATTR_RO(destroy_by_rcu);
 
 static ssize_t reserved_show(struct kmem_cache *s, char *buf)
 {
-	return sprintf(buf, "%d\n", s->reserved);
+	return sprintf(buf, "%u\n", s->reserved);
 }
 SLAB_ATTR_RO(reserved);
 
_
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