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 f4b9bc90d6a76279d317f1773d68c6a02d28a0fc..ba57b5adf87386709d024392e041b2fe3be40d3f 100644 (file)
--- a/arch/arm/mach-msm/scm.c
+++ b/arch/arm/mach-msm/scm.c
@@ -174,7 +174,7 @@ static u32 smc(u32 cmd_addr)
        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 @@ u32 scm_get_version(void)
                return version;
 
        mutex_lock(&scm_lock);
-       asm(
+       asm volatile(
                __asmeq("%0", "r1")
                __asmeq("%1", "r0")
                __asmeq("%2", "r1")