[PATCH 2/4] msm: scm: Fix improper register assignment

[Stephen Boyd]

Assign the registers used in the inline assembly immediately
before the inline assembly block. This ensures the compiler
doesn't optimize away dead register assignments when it
shouldn't.

Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
---
 arch/arm/mach-msm/scm.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-msm/scm.c b/arch/arm/mach-msm/scm.c
index ba57b5a..5eddf54 100644
--- a/arch/arm/mach-msm/scm.c
+++ b/arch/arm/mach-msm/scm.c
@@ -264,13 +264,16 @@ u32 scm_get_version(void)
 {
 	int context_id;
 	static u32 version = -1;
-	register u32 r0 asm("r0") = 0x1 << 8;
-	register u32 r1 asm("r1") = (u32)&context_id;
+	register u32 r0 asm("r0");
+	register u32 r1 asm("r1");
 
 	if (version != -1)
 		return version;
 
 	mutex_lock(&scm_lock);
+
+	r0 = 0x1 << 8;
+	r1 = (u32)&context_id;
 	asm volatile(
 		__asmeq("%0", "r1")
 		__asmeq("%1", "r0")
-- 
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

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