[Minios-devel] [UNIKRAFT PATCHv6 05/23] plat/common: Remove earlycloberr from SYSREG_READ32 for Arm64

[Jia He <justin.he@xxxxxxx>]

From: Wei Chen <wei.chen@xxxxxxx>
As the operand will not be written before the instruction has finished.
So, we don't need the earlycloberr (&) in SYSREG_READ32.

Signed-off-by: Wei Chen <wei.chen@xxxxxxx>
Signed-off-by: Jia He <justin.he@xxxxxxx>
Reviewed-by: Sharan Santhanam <sharan.santhanam@xxxxxxxxx>
---
 plat/common/include/arm/arm64/cpu.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/plat/common/include/arm/arm64/cpu.h 
b/plat/common/include/arm/arm64/cpu.h
index c009fc8..1495192 100644
--- a/plat/common/include/arm/arm64/cpu.h
+++ b/plat/common/include/arm/arm64/cpu.h
@@ -73,7 +73,7 @@ static inline void _init_cpufeatures(void)
 #define SYSREG_READ(reg) \
 ({     uint64_t val; \
        __asm__ __volatile__("mrs %0, " __STRINGIFY(reg) \
-                       : "=&r" (val)); \
+                       : "=r" (val)); \
        val; \
 })

@@ -84,7 +84,7 @@ static inline void _init_cpufeatures(void)
 #define SYSREG_READ32(reg) \
 ({     uint32_t val; \
        __asm__ __volatile__("mrs %0, " __STRINGIFY(reg) \
-                       : "=&r" (val)); \
+                       : "=r" (val)); \
        val; \
 })

--
2.17.1

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