diff options
| author | Mark Charlebois <charlebm@gmail.com> | 2014-08-27 05:29:33 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-01-22 21:48:45 +0000 |
| commit | 0fab209aac128615dd2a8e88188073f89fba6dab (patch) | |
| tree | 2becef5bb7a3513eb331f3df184ea8dc4351143f | |
| parent | 29769603ea7b06e98f229b87bc0a67058cea394d (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>
(cherry picked from commit 34ccf8f455f1ae7761810a74308f82daca67ced1)
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | arch/arm64/include/asm/percpu.h | 4 |
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; } |