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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: NMark Hambleton <mahamble@broadcom.com> Signed-off-by: NMark Brown <broonie@linaro.org> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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