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As xchg*() and cmpxchg*() may be instrumented by atomic-instrumented.h, it's necessary to include <linux/atomic.h> to use these, rather than <asm/cmpxchg.h>, which is effectively an arch-internal header. In a couple of places we include <asm/cmpxchg.h>, but get away with this as <linux/atomic.h> gets pulled in inidrectly by another include. Before we convert more architectures to use atomic-instrumented.h, let's fix these up to use <linux/atomic.h> so that we don't make things more fragile. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Will Deacon <will@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20210525140232.53872-3-mark.rutland@arm.com