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Commit 52ee6d74 authored by Alexey Dobriyan's avatar Alexey Dobriyan Committed by Linus Torvalds
Browse files

slub: make ->inuse unsigned int 

->inuse is "the number of bytes in actual use by the object",
can't be negative.

Link: http://lkml.kernel.org/r/20180305200730.15812-14-adobriyan@gmail.com


Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
Acked-by: default avatarChristoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 3a3791ec

include/linux/slub_def.h

+1 −1
Original line number Diff line number Diff line
@@ -98,7 +98,7 @@ struct kmem_cache { 
	gfp_t allocflags;	/* gfp flags to use on each alloc */

	int refcount;		/* Refcount for slab cache destroy */

	void (*ctor)(void *);

	int inuse;		/* Offset to metadata */

	unsigned int inuse;		/* Offset to metadata */

	unsigned int align;		/* Alignment */

	unsigned int reserved;		/* Reserved bytes at the end of slabs */

	unsigned int red_left_pad;	/* Left redzone padding size */

mm/slub.c

+2 −3
Original line number Diff line number Diff line
@@ -4256,12 +4256,11 @@ __kmem_cache_alias(const char *name, unsigned int size, unsigned int align, 
		 * the complete object on kzalloc.

		 */

		s->object_size = max(s->object_size, (int)size);

		s->inuse = max_t(int, s->inuse, ALIGN(size, sizeof(void *)));

		s->inuse = max(s->inuse, ALIGN(size, sizeof(void *)));



		for_each_memcg_cache(c, s) {

			c->object_size = s->object_size;

			c->inuse = max_t(int, c->inuse,

					 ALIGN(size, sizeof(void *)));

			c->inuse = max(c->inuse, ALIGN(size, sizeof(void *)));

		}



		if (sysfs_slab_alias(s, name)) {