slub: make ->offset unsigned int

->offset is free pointer offset from the start of the object, can't be
negative.

Link: http://lkml.kernel.org/r/20180305200730.15812-16-adobriyan@gmail.com
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Christoph 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index d2cc1391f17ad62ab563803d253ccc3bbefc3519..db00dbd7e89f302dba3c7946729d859d656bdf94 100644 (file)
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -86,7 +86,7 @@ struct kmem_cache {
        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 */
-       int offset;             /* Free pointer offset. */
+       unsigned int offset;    /* Free pointer offset. */
 #ifdef CONFIG_SLUB_CPU_PARTIAL
        /* Number of per cpu partial objects to keep around */
        unsigned int cpu_partial;