diff options
| author | Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> | 2019-11-08 19:20:22 +0300 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2019-11-08 16:14:32 -0800 |
| commit | f091d5a426447cc427680bdd3adc7773aa2867df (patch) | |
| tree | e255dd3806463334c58d03aff06dee6e3b3268c3 /arch/arc/include/asm/cache.h | |
| parent | 2f4ecf68a048de44d72157d637bf9cbbbdb357b0 (diff) | |
| download | linux-f091d5a426447cc427680bdd3adc7773aa2867df.tar.bz2 | |
ARC: ARCv2: jump label: implement jump label patching
Implement jump label patching for ARC. Jump labels provide
an interface to generate dynamic branches using
self-modifying code.
This allows us to implement conditional branches where
changing branch direction is expensive but branch selection
is basically 'free'
This implementation uses 32-bit NOP and BRANCH instructions
which forced to be aligned by 4 to guarantee that they don't
cross L1 cache line boundary and can be update atomically.
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/include/asm/cache.h')
| -rw-r--r-- | arch/arc/include/asm/cache.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arc/include/asm/cache.h b/arch/arc/include/asm/cache.h index 918804c7c1a4..d8ece4292388 100644 --- a/arch/arc/include/asm/cache.h +++ b/arch/arc/include/asm/cache.h @@ -25,6 +25,8 @@ #ifndef __ASSEMBLY__ +#include <linux/build_bug.h> + /* Uncached access macros */ #define arc_read_uncached_32(ptr) \ ({ \ |