arm64: cmpxchg: update macros to prevent warnings
authorMark Hambleton <mahamble@broadcom.com>
Tue, 3 Dec 2013 19:19:12 +0000 (19:19 +0000)
committerCatalin Marinas <catalin.marinas@arm.com>
Thu, 19 Dec 2013 17:44:05 +0000 (17:44 +0000)
commit60010e508111b2fd3d73de56f3b2c2bfc0f9eba1
treeea8b6fc26647563fa615766b361990ab15a3d6a1
parentee6214cec7818867f368c35843ea1f3dffcbb57c
arm64: cmpxchg: update macros to prevent warnings

Make sure the value we are going to return is referenced in order to
avoid warnings from newer GCCs such as:

arch/arm64/include/asm/cmpxchg.h:162:3: warning: value computed is not used [-Wunused-value]
  ((__typeof__(*(ptr)))__cmpxchg_mb((ptr),   \
   ^
net/netfilter/nf_conntrack_core.c:674:2: note: in expansion of macro ‘cmpxchg’
  cmpxchg(&nf_conntrack_hash_rnd, 0, rand);

[Modified to use the current underlying implementation as current
mainline for both cmpxchg() and cmpxchg_local() does -- broonie]

Signed-off-by: Mark Hambleton <mahamble@broadcom.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arch/arm64/include/asm/cmpxchg.h