Unverified Commit 3e86460e authored by Wang Xuerui's avatar Wang Xuerui Committed by Paul Burton
Browse files

MIPS: asm: local: add barriers for Loongson 



Somehow these LL/SC usages are not taken care of, breaking Loongson
builds. Add the SYNCs appropriately.

Signed-off-by: default avatarWang Xuerui <git@xen0n.name>
Signed-off-by: default avatarPaul Burton <paulburton@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: Huacai Chen <chenhc@lemote.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: <stable@vger.kernel.org> # v5.5+
parent c9444384

arch/mips/include/asm/local.h

+4 −0
Original line number Diff line number Diff line
@@ -37,6 +37,7 @@ static __inline__ long local_add_return(long i, local_t * l) 
		__asm__ __volatile__(

		"	.set	push					\n"

		"	.set	arch=r4000				\n"

			__SYNC(full, loongson3_war) "			\n"

		"1:"	__LL	"%1, %2		# local_add_return	\n"

		"	addu	%0, %1, %3				\n"

			__SC	"%0, %2					\n"
@@ -52,6 +53,7 @@ static __inline__ long local_add_return(long i, local_t * l) 
		__asm__ __volatile__(

		"	.set	push					\n"

		"	.set	"MIPS_ISA_ARCH_LEVEL"			\n"

			__SYNC(full, loongson3_war) "			\n"

		"1:"	__LL	"%1, %2		# local_add_return	\n"

		"	addu	%0, %1, %3				\n"

			__SC	"%0, %2					\n"
@@ -84,6 +86,7 @@ static __inline__ long local_sub_return(long i, local_t * l) 
		__asm__ __volatile__(

		"	.set	push					\n"

		"	.set	arch=r4000				\n"

			__SYNC(full, loongson3_war) "			\n"

		"1:"	__LL	"%1, %2		# local_sub_return	\n"

		"	subu	%0, %1, %3				\n"

			__SC	"%0, %2					\n"
@@ -99,6 +102,7 @@ static __inline__ long local_sub_return(long i, local_t * l) 
		__asm__ __volatile__(

		"	.set	push					\n"

		"	.set	"MIPS_ISA_ARCH_LEVEL"			\n"

			__SYNC(full, loongson3_war) "			\n"

		"1:"	__LL	"%1, %2		# local_sub_return	\n"

		"	subu	%0, %1, %3				\n"

			__SC	"%0, %2					\n"

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