From mboxrd@z Thu Jan 1 00:00:00 1970 From: sboyd@codeaurora.org (Stephen Boyd) Date: Thu, 24 Feb 2011 10:44:42 -0800 Subject: [PATCH 1/4] msm: scm: Mark inline asm as volatile In-Reply-To: <1298573085-23217-1-git-send-email-sboyd@codeaurora.org> References: <1298573085-23217-1-git-send-email-sboyd@codeaurora.org> Message-ID: <1298573085-23217-2-git-send-email-sboyd@codeaurora.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- arch/arm/mach-msm/scm.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) 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 @@ 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") -- Sent by an employee of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.