msm: scm: Mark inline asm as volatile
We don't want the compiler to remove these asm statements or
reorder them in any way. Mark them as volatile to be sure.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: David Brown <davidb@codeaurora.org>
diff --git a/arch/arm/mach-msm/scm.c b/arch/arm/mach-msm/scm.c
index f4b9bc9..ba57b5a 100644
--- a/arch/arm/mach-msm/scm.c
+++ b/arch/arm/mach-msm/scm.c
@@ -174,7 +174,7 @@
register u32 r0 asm("r0") = 1;
register u32 r1 asm("r1") = (u32)&context_id;
register u32 r2 asm("r2") = cmd_addr;
- asm(
+ asm volatile(
__asmeq("%0", "r0")
__asmeq("%1", "r0")
__asmeq("%2", "r1")
@@ -271,7 +271,7 @@
return version;
mutex_lock(&scm_lock);
- asm(
+ asm volatile(
__asmeq("%0", "r1")
__asmeq("%1", "r0")
__asmeq("%2", "r1")