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| author | Will Deacon <will.deacon@arm.com> | 2017-07-11 00:50:49 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-11 01:32:34 +0200 |
| commit | b6d0f14abb7c1d9d522c064633c820aaeb9bbfbf (patch) | |
| tree | 8d93ae60d5fced2dfcb0215fde88ff1abefbfd85 /arch/frv | |
| parent | frv: use generic fb.h (diff) | |
| download | linux-b6d0f14abb7c1d9d522c064633c820aaeb9bbfbf.tar.xz linux-b6d0f14abb7c1d9d522c064633c820aaeb9bbfbf.zip | |
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.com
Signed-off-by: Will Deacon <will.deacon@arm.com>
Reported-by: kbuild 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/frv')
| -rw-r--r-- | arch/frv/include/asm/cmpxchg.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/frv/include/asm/cmpxchg.h b/arch/frv/include/asm/cmpxchg.h index a899765102ea..ad1f11cfa92a 100644 --- a/arch/frv/include/asm/cmpxchg.h +++ b/arch/frv/include/asm/cmpxchg.h @@ -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 |