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| author | Paul E. McKenney <paulmck@kernel.org> | 2024-03-28 01:21:31 +0300 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2024-09-13 17:10:38 +0300 |
| commit | c81a748edefd098ea21dd35d4bba03f69412fc26 (patch) | |
| tree | c04d181cc52b0ee66bc0172392cc6414bc5a01ac /arch/sh/include/asm/cmpxchg.h | |
| parent | f2519d4d4fc4d36f2b58c5614357de9f5b4032fc (diff) | |
| download | linux-c81a748edefd098ea21dd35d4bba03f69412fc26.tar.xz | |
sh: Emulate one-byte cmpxchg
Use the new cmpxchg_emu_u8() to emulate one-byte cmpxchg() on sh.
[ paulmck: Drop two-byte support per Arnd Bergmann feedback. ]
[ paulmck: Apply feedback from Naresh Kamboju. ]
[ Apply Geert Uytterhoeven feedback. ]
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Andi Shyti <andi.shyti@linux.intel.com>
Cc: Palmer Dabbelt <palmer@rivosinc.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: <linux-sh@vger.kernel.org>
Acked-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Diffstat (limited to 'arch/sh/include/asm/cmpxchg.h')
| -rw-r--r-- | arch/sh/include/asm/cmpxchg.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/sh/include/asm/cmpxchg.h b/arch/sh/include/asm/cmpxchg.h index 5d617b3ef78f..1e5dc5ccf7bf 100644 --- a/arch/sh/include/asm/cmpxchg.h +++ b/arch/sh/include/asm/cmpxchg.h @@ -9,6 +9,7 @@ #include <linux/compiler.h> #include <linux/types.h> +#include <linux/cmpxchg-emu.h> #if defined(CONFIG_GUSA_RB) #include <asm/cmpxchg-grb.h> @@ -56,6 +57,8 @@ static inline unsigned long __cmpxchg(volatile void * ptr, unsigned long old, unsigned long new, int size) { switch (size) { + case 1: + return cmpxchg_emu_u8(ptr, old, new); case 4: return __cmpxchg_u32(ptr, old, new); } |