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| author | Palmer Dabbelt <palmer@rivosinc.com> | 2024-03-19 18:52:27 -0700 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2024-03-20 08:56:12 -0700 |
| commit | cd6c916ccf21bb4c16367493541192e0f3a19278 (patch) | |
| tree | ed86e64f3f0630cfaad02a360fe731f80e8f1889 /arch/riscv/include/asm/fence.h | |
| parent | c70dfa4a2723ff5046fdc6d8a054713483f64f1b (diff) | |
| parent | 9133e6e6908d95812e89619f8a86abd0deb17bf3 (diff) | |
| download | linux-cd6c916ccf21bb4c16367493541192e0f3a19278.tar.gz | |
Merge patch series "riscv/barrier: tidying up barrier-related macro"
Eric Chan <ericchancf@google.com> says:
This series makes barrier-related macro more neat and clear.
This is a follow-up to [0-3], change to multiple patches,
for readability, create new message thread.
[0](v1/v2) https://lore.kernel.org/lkml/20240209125048.4078639-1-ericchancf@google.com/
[1] (v3) https://lore.kernel.org/lkml/20240213142856.2416073-1-ericchancf@google.com/
[2] (v4) https://lore.kernel.org/lkml/20240213200923.2547570-1-ericchancf@google.com/
[4] (v5) https://lore.kernel.org/lkml/20240213223810.2595804-1-ericchancf@google.com/
* b4-shazam-merge:
riscv/barrier: Add missing space after ','
riscv/barrier: Consolidate fence definitions
riscv/barrier: Define RISCV_FULL_BARRIER
riscv/barrier: Define __{mb,rmb,wmb}
Link: https://lore.kernel.org/r/20240217131206.3667544-1-ericchancf@google.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/include/asm/fence.h')
| -rw-r--r-- | arch/riscv/include/asm/fence.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/riscv/include/asm/fence.h b/arch/riscv/include/asm/fence.h index 2b443a3a487f3c..6bcd80325dfc17 100644 --- a/arch/riscv/include/asm/fence.h +++ b/arch/riscv/include/asm/fence.h @@ -1,12 +1,18 @@ #ifndef _ASM_RISCV_FENCE_H #define _ASM_RISCV_FENCE_H +#define RISCV_FENCE_ASM(p, s) "\tfence " #p "," #s "\n" +#define RISCV_FENCE(p, s) \ + ({ __asm__ __volatile__ (RISCV_FENCE_ASM(p, s) : : : "memory"); }) + #ifdef CONFIG_SMP -#define RISCV_ACQUIRE_BARRIER "\tfence r , rw\n" -#define RISCV_RELEASE_BARRIER "\tfence rw, w\n" +#define RISCV_ACQUIRE_BARRIER RISCV_FENCE_ASM(r, rw) +#define RISCV_RELEASE_BARRIER RISCV_FENCE_ASM(rw, w) +#define RISCV_FULL_BARRIER RISCV_FENCE_ASM(rw, rw) #else #define RISCV_ACQUIRE_BARRIER #define RISCV_RELEASE_BARRIER +#define RISCV_FULL_BARRIER #endif #endif /* _ASM_RISCV_FENCE_H */ |