[PATCH RFC v2 riscv/for-next 5/5] riscv: align arch_static_branch function

[Andy Chiu]

runtime code patching must be done at a naturally aligned address, or we
may execute on a partial instruction.

Signed-off-by: Andy Chiu <andy.chiu at sifive.com>
Reviewed-by: Greentime Hu <greentime.hu at sifive.com>
---
 arch/riscv/include/asm/jump_label.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/riscv/include/asm/jump_label.h b/arch/riscv/include/asm/jump_label.h
index 38af2ec7b9bf..729991e8f782 100644
--- a/arch/riscv/include/asm/jump_label.h
+++ b/arch/riscv/include/asm/jump_label.h
@@ -18,6 +18,7 @@ static __always_inline bool arch_static_branch(struct static_key *key,
 					       bool branch)
 {
 	asm_volatile_goto(
+		"	.align		2			\n\t"
 		"	.option push				\n\t"
 		"	.option norelax				\n\t"
 		"	.option norvc				\n\t"
@@ -39,6 +40,7 @@ static __always_inline bool arch_static_branch_jump(struct static_key *key,
 						    bool branch)
 {
 	asm_volatile_goto(
+		"	.align		2			\n\t"
 		"	.option push				\n\t"
 		"	.option norelax				\n\t"
 		"	.option norvc				\n\t"
-- 
2.36.0