slab, slub, slob: convert slab_flags_t to 32-bit
struct kmem_cache::flags is "unsigned long" which is unnecessary on
64-bit as no flags are defined in the higher bits.
Switch the field to 32-bit and save some space on x86_64 until such
flags appear:
add/remove: 0/0 grow/shrink: 0/107 up/down: 0/-657 (-657)
function old new delta
sysfs_slab_add 720 719 -1
...
check_object 699 676 -23
[akpm@linux-foundation.org: fix printk warning]
Link: http://lkml.kernel.org/r/20171021100635.GA8287@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
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>
4 files changed