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| author | Huacai Chen <chenhuacai@loongson.cn> | 2022-05-31 13:04:12 +0300 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2022-06-03 15:09:29 +0300 |
| commit | 46859ac8af52ae599e1b51992ddef3eb43f295fc (patch) | |
| tree | c1e6640316d5d8748bea046b71d2260b81cbe314 /arch/loongarch/include/asm/cmpxchg.h | |
| parent | c6b99bed6b8f3255bd2f65a8e606352e0e638ad0 (diff) | |
| download | linux-46859ac8af52ae599e1b51992ddef3eb43f295fc.tar.xz | |
LoongArch: Add multi-processor (SMP) support
LoongArch-based procesors have 4, 8 or 16 cores per package. This patch
adds multi-processor (SMP) support for LoongArch.
Reviewed-by: WANG Xuerui <git@xen0n.name>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/include/asm/cmpxchg.h')
| -rw-r--r-- | arch/loongarch/include/asm/cmpxchg.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/cmpxchg.h b/arch/loongarch/include/asm/cmpxchg.h index 48613b872bc8..75b3a4478652 100644 --- a/arch/loongarch/include/asm/cmpxchg.h +++ b/arch/loongarch/include/asm/cmpxchg.h @@ -59,6 +59,7 @@ static inline unsigned long __xchg(volatile void *ptr, unsigned long x, " " st " $t0, %1 \n" \ " beq $zero, $t0, 1b \n" \ "2: \n" \ + __WEAK_LLSC_MB \ : "=&r" (__ret), "=ZB"(*m) \ : "ZB"(*m), "Jr" (old), "Jr" (new) \ : "t0", "memory"); \ |