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authorMark Charlebois <charlebm@gmail.com>2014-08-27 05:29:33 +0100
committerWill Deacon <will.deacon@arm.com>2014-09-08 14:39:19 +0100
commit34ccf8f455f1ae7761810a74308f82daca67ced1 (patch)
tree916ccd56a9f3a822a5971f10e644487f827da55d /arch/arm64/include/asm/percpu.h
parent2128df143d840a20e12818290eb6e40b95cc4ac0 (diff)
arm64: LLVMLinux: Use global stack register variable for aarch64
To support both Clang and GCC, use the global stack register variable vs a local register variable. Author: Mark Charlebois <charlebm@gmail.com> Signed-off-by: Mark Charlebois <charlebm@gmail.com> Signed-off-by: Behan Webster <behanw@converseincode.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/percpu.h')
-rw-r--r--arch/arm64/include/asm/percpu.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/percpu.h b/arch/arm64/include/asm/percpu.h
index 453a179469a3..5279e5733386 100644
--- a/arch/arm64/include/asm/percpu.h
+++ b/arch/arm64/include/asm/percpu.h
@@ -26,13 +26,13 @@ static inline void set_my_cpu_offset(unsigned long off)
static inline unsigned long __my_cpu_offset(void)
{
unsigned long off;
- register unsigned long *sp asm ("sp");
/*
* We want to allow caching the value, so avoid using volatile and
* instead use a fake stack read to hazard against barrier().
*/
- asm("mrs %0, tpidr_el1" : "=r" (off) : "Q" (*sp));
+ asm("mrs %0, tpidr_el1" : "=r" (off) :
+ "Q" (*(const unsigned long *)current_stack_pointer));
return off;
}