lib/string.c: introduce memchr_inv()

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memchr_inv() is mainly used to check whether the whole buffer is filled
with just a specified byte.

The function name and prototype are stolen from logfs and the
implementation is from SLUB.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Christoph Lameter <cl@linux-foundation.org>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Matt Mackall <mpm@selenic.com>
Acked-by: Joern Engel <joern@logfs.org>
Cc: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

...

This commit is contained in:

Akinobu Mita 2011-10-31 17:08:07 -07:00 • committed by Linus Torvalds

parent 77311139f3

commit 798248206b

5 changed files with 57 additions and 68 deletions

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1

fs/logfs/logfs.h

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22

fs/logfs/super.c

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1

include/linux/string.h

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54

lib/string.c

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47

mm/slub.c

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