From: Mikael Pettersson <mikpe@it.uu.se>
Date: Wed, 30 Jul 2008 22:40:50 +0000 (-0700)
Subject: sparc64: FUTEX_OP_ANDN fix
X-Git-Tag: v2.6.27-rc2~74^2~8
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d72609e17fd93bb2f7e0f7e1bdc70b6d20e43843;p=pandora-kernel.git

sparc64: FUTEX_OP_ANDN fix

Correct sparc64's implementation of FUTEX_OP_ANDN to do a
bitwise negate of the oparg parameter before applying the
AND operation. All other archs that support FUTEX_OP_ANDN
either negate oparg explicitly (frv, ia64, mips, sh, x86),
or do so indirectly by using an and-not instruction (powerpc).
Since sparc64 has and-not, I chose to use that solution.

I've not found any use of FUTEX_OP_ANDN in glibc so the
impact of this bug is probably minor. But other user-space
components may try to use it so it should still get fixed.

Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

Reading git-diff-tree failed