Commit b6d0f14a authored by Will Deacon's avatar Will Deacon Committed by Linus Torvalds

frv: cmpxchg: implement cmpxchg64()

FRV supports 64-bit cmpxchg, which is provided by the arch code as
__cmpxchg_64 and subsequently used to implement atomic64_cmpxchg.

This patch hooks up the generic cmpxchg64 API using the same function,
which also provides default definitions of the relaxed, acquire and
release variants.  This fixes the build when COMPILE_TEST=y and
IOMMU_IO_PGTABLE_LPAE=y.

Link: http://lkml.kernel.org/r/1499084670-6996-1-git-send-email-will.deacon@arm.comSigned-off-by: default avatarWill Deacon <will.deacon@arm.com>
Reported-by: default avatarkbuild test robot <fengguang.wu@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 31b7fb44
......@@ -76,6 +76,7 @@ extern uint32_t __xchg_32(uint32_t i, volatile void *v);
* - if (*ptr != test) then orig = *ptr;
*/
extern uint64_t __cmpxchg_64(uint64_t test, uint64_t new, volatile uint64_t *v);
#define cmpxchg64(p, o, n) __cmpxchg_64((o), (n), (p))
#ifndef CONFIG_FRV_OUTOFLINE_ATOMIC_OPS
......
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