diff options
| author | Vineet Gupta <vgupta@synopsys.com> | 2015-07-27 17:23:28 +0530 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2016-09-30 14:48:17 -0700 |
| commit | ce6365270ecd1216b48fb1440978e454ae0144de (patch) | |
| tree | 2e46017d408be15aa5834675cd11c06122fc353c /arch/arc/Kconfig | |
| parent | 26c01c49d559268527d78f45a6818fae0c204a45 (diff) | |
ARCv2: Implement atomic64 based on LLOCKD/SCONDD instructions
ARCv2 ISA provides 64-bit exclusive load/stores so use them to implement
the 64-bit atomics and elide the spinlock based generic 64-bit atomics
boot tested with atomic64 self-test (and GOD bless the person who wrote
them, I realized my inline assmebly is sloppy as hell)
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-snps-arc@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/Kconfig')
| -rw-r--r-- | arch/arc/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 0d3e59f56974..073b3582544b 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -13,7 +13,7 @@ config ARC select CLKSRC_OF select CLONE_BACKWARDS select COMMON_CLK - select GENERIC_ATOMIC64 + select GENERIC_ATOMIC64 if !ISA_ARCV2 || !(ARC_HAS_LL64 && ARC_HAS_LLSC) select GENERIC_CLOCKEVENTS select GENERIC_FIND_FIRST_BIT # for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP |