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. Cc: Joerg Roedel <[email protected]> Cc: Robin Murphy <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Andrew Morton <[email protected]> Reported-by: kbuild test robot <[email protected]> Signed-off-by: Will Deacon <[email protected]> --- FRV is orphaned, so not sure where to send this. arch/frv/include/asm/cmpxchg.h | 1 + 1 file changed, 1 insertion(+) 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 -- 2.1.4
