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author | Mark Charlebois | 2014-08-27 06:29:33 +0200 |
---|---|---|
committer | Will Deacon | 2014-09-08 15:39:19 +0200 |
commit | 34ccf8f455f1ae7761810a74308f82daca67ced1 (patch) | |
tree | 916ccd56a9f3a822a5971f10e644487f827da55d | |
parent | arm64: LLVMLinux: Use current_stack_pointer in kernel/traps.c (diff) | |
download | kernel-qcow2-linux-34ccf8f455f1ae7761810a74308f82daca67ced1.tar.gz kernel-qcow2-linux-34ccf8f455f1ae7761810a74308f82daca67ced1.tar.xz kernel-qcow2-linux-34ccf8f455f1ae7761810a74308f82daca67ced1.zip |
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>
-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; } |