[PATCH v3 3/5] arch,locking/atomic: openrisc: add arch_cmpxchg[64]_local

From: wuqiang.matt
Date: Tue Nov 21 2023 - 09:25:28 EST


openrisc hasn't arch_cmpxhg_local implemented, which causes
building failures for any references of try_cmpxchg_local,
reported by the kernel test robot.

This patch implements arch_cmpxchg[64]_local with the native
cmpxchg variant if the corresponding data size is supported,
otherwise generci_cmpxchg[64]_local is to be used.

Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202310272207.tLPflya4-lkp@xxxxxxxxx/

Signed-off-by: wuqiang.matt <wuqiang.matt@xxxxxxxxxxxxx>
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
---
arch/openrisc/include/asm/cmpxchg.h | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/arch/openrisc/include/asm/cmpxchg.h b/arch/openrisc/include/asm/cmpxchg.h
index 8ee151c072e4..f1ffe8b6f5ef 100644
--- a/arch/openrisc/include/asm/cmpxchg.h
+++ b/arch/openrisc/include/asm/cmpxchg.h
@@ -139,6 +139,12 @@ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
(unsigned long)(n), \
sizeof(*(ptr))); \
})
+#define arch_cmpxchg_local arch_cmpxchg
+
+/* always make arch_cmpxchg64_local available for openrisc */
+#include <asm-generic/cmpxchg-local.h>
+
+#define arch_cmpxchg64_local(ptr, o, n) __generic_cmpxchg64_local((ptr), (o), (n))

/*
* This function doesn't exist, so you'll get a linker error if
--
2.40.1