diff options
| author | Will Deacon <will.deacon@arm.com> | 2013-07-02 12:10:42 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2013-09-30 16:42:55 +0100 |
| commit | 27a84793e42084392181ef2ef51a954f1cf0c519 (patch) | |
| tree | 955a332f67b4be1d37fd195422a68ca4af806761 /arch/arm/include/asm/processor.h | |
| parent | e744dff72bcd4d9588af91e1feb662702222ca12 (diff) | |
ARM: smp_on_up: move inline asm ALT_SMP patching macro out of spinlock.h
Patching UP/SMP alternatives inside inline assembly blocks is useful
outside of the spinlock implementation, where it is used for sev and wfe.
This patch lifts the macro into processor.h and gives it a scarier name
to (a) avoid conflicts in the global namespace and (b) to try and deter
its usage unless you "know what you're doing". The W macro for generating
wide instructions when targetting Thumb-2 is also made available under
the name WASM, to reduce the potential for conflicts with other headers.
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm/include/asm/processor.h')
| -rw-r--r-- | arch/arm/include/asm/processor.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/include/asm/processor.h b/arch/arm/include/asm/processor.h index 514a989cbd4b..26164c92fa30 100644 --- a/arch/arm/include/asm/processor.h +++ b/arch/arm/include/asm/processor.h @@ -22,6 +22,7 @@ #include <asm/hw_breakpoint.h> #include <asm/ptrace.h> #include <asm/types.h> +#include <asm/unified.h> #ifdef __KERNEL__ #define STACK_TOP ((current->personality & ADDR_LIMIT_32BIT) ? \ @@ -87,6 +88,17 @@ unsigned long get_wchan(struct task_struct *p); #define KSTK_EIP(tsk) task_pt_regs(tsk)->ARM_pc #define KSTK_ESP(tsk) task_pt_regs(tsk)->ARM_sp +#ifdef CONFIG_SMP +#define __ALT_SMP_ASM(smp, up) \ + "9998: " smp "\n" \ + " .pushsection \".alt.smp.init\", \"a\"\n" \ + " .long 9998b\n" \ + " " up "\n" \ + " .popsection\n" +#else +#define __ALT_SMP_ASM(smp, up) up +#endif + /* * Prefetching support - only ARMv5. */ |