[PATCH V2 5/6] arm64: LLVMLinux: Use global stack register variable for aarch64
STALE4423d
From: behanw at converseincode.com <hidden>
Date: 2014-08-27 04:30:38
Also in:
lkml
Subsystem:
arm64 port (aarch64 architecture), per-cpu memory allocator, the rest · Maintainers:
Catalin Marinas, Will Deacon, Dennis Zhou, Tejun Heo, Christoph Lameter, Linus Torvalds
Revision v2 of 6 in this series.
Revisions (6)
From: Mark Charlebois <redacted> To support both Clang and GCC, use the global stack register variable vs a local register variable. Author: Mark Charlebois [off-list ref] Signed-off-by: Mark Charlebois <redacted> Signed-off-by: Behan Webster <redacted> --- 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