Messages in this thread Patch in this message | | | From | behanw@converse ... | Subject | [PATCH V2 5/6] arm64: LLVMLinux: Use global stack register variable for aarch64 | Date | Tue, 26 Aug 2014 21:29:33 -0700 |
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From: Mark Charlebois <charlebm@gmail.com>
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> --- arch/arm64/include/asm/percpu.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/include/asm/percpu.h b/arch/arm64/include/asm/percpu.h index 453a179..5279e57 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; } -- 1.9.1
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