Slab allocators: consistent ZERO_SIZE_PTR support and NULL result semantics

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Define ZERO_OR_NULL_PTR macro to be able to remove the checks from the
allocators.  Move ZERO_SIZE_PTR related stuff into slab.h.

Make ZERO_SIZE_PTR work for all slab allocators and get rid of the
WARN_ON_ONCE(size == 0) that is still remaining in SLAB.

Make slub return NULL like the other allocators if a too large memory segment
is requested via __kmalloc.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Christoph Lameter 2007-07-17 04:03:22 -07:00 • committed by Linus Torvalds

parent ef2ad80c7d

commit 6cb8f91320

7 changed files with 57 additions and 35 deletions

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13

include/linux/slab.h

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12

include/linux/slab_def.h

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12

include/linux/slub_def.h

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