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(parent: 0b8c78f) | patch
/dev/zero: avoid repeated access_ok() checks
authorNikanth Karthikesan <knikanth@suse.de>
Wed, 23 Sep 2009 22:57:09 +0000 (15:57 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 24 Sep 2009 14:21:03 +0000 (07:21 -0700)
commitbb521c5de070b86a1e049e2dbf62328f717ff1e8
treee2a4416f35e84873f75c0e86ebae5552cf4ae2b2tree | snapshot
parent0b8c78f2bfa6ebed0f47794b5995a0d4b3fe456dcommit | diff
/dev/zero: avoid repeated access_ok() checks

In read_zero, we check for access_ok() once for the count bytes.  It is
unnecessarily checked again in clear_user.  Use __clear_user, which does
not check for access_ok().

Signed-off-by: Nikanth Karthikesan <knikanth@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/char/mem.c diff | blob | history
Domain: System / Kernel;