From: Guillaume GARDET <guillaume.gardet@free.fr>
Date: Fri, 4 Jan 2019 08:23:19 +0000 (+0100)
Subject: exynos: Leave the compiler to choose the register to avoid possible r0 corruption
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=df1ff4d6ba591a5fcb9549e895b23c781d8fda6d;p=u-boot.git

exynos: Leave the compiler to choose the register to avoid possible r0 corruption

Reported-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Signed-off-by: Guillaume GARDET <guillaume.gardet@free.fr>

Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Cc: Tom Rini <trini@konsulko.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
---

diff --git a/arch/arm/mach-exynos/include/mach/system.h b/arch/arm/mach-exynos/include/mach/system.h
index 81fa9800b4..48f13c7648 100644
--- a/arch/arm/mach-exynos/include/mach/system.h
+++ b/arch/arm/mach-exynos/include/mach/system.h
@@ -58,8 +58,7 @@ struct exynos5_sysreg {
 /* Move 0xd3 value to CPSR register to enable SVC mode */
 #define svc32_mode_en() __asm__ __volatile__				\
 			("@ I&F disable, Mode: 0x13 - SVC\n\t"		\
-			 "mov     r0, #0x13|0xC0\n\t"			\
-			 "msr     cpsr_c, r0\n\t" : : )
+			 "msr     cpsr_c, %0\n\t" : : "r"(0x13|0xC0))
 
 /* Set program counter with the given value */
 #define set_pc(x) __asm__ __volatile__ ("mov     pc, %0\n\t" : : "r"(x))