Messages in this thread Patch in this message | | | From | Christophe Leroy <> | Subject | [PATCH] powerpc: inline current_stack_pointer() | Date | Mon, 23 May 2016 10:46:02 +0200 (CEST) |
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current_stack_pointeur() is a single instruction function. it It is not worth breaking the execution flow with a bl/blr for a single instruction
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> --- arch/powerpc/include/asm/reg.h | 7 ++++++- arch/powerpc/kernel/misc.S | 4 ---- arch/powerpc/kernel/ppc_ksyms.c | 2 -- 3 files changed, 6 insertions(+), 7 deletions(-)
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index c1e82e9..7ce6777 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -1301,7 +1301,12 @@ static inline unsigned long mfvtb (void) #define proc_trap() asm volatile("trap") -extern unsigned long current_stack_pointer(void); +static inline unsigned long current_stack_pointer(void) +{ + register unsigned long *ptr asm("r1"); + + return *ptr; +} extern unsigned long scom970_read(unsigned int address); extern void scom970_write(unsigned int address, unsigned long value); diff --git a/arch/powerpc/kernel/misc.S b/arch/powerpc/kernel/misc.S index 0d43219..7ce26d4 100644 --- a/arch/powerpc/kernel/misc.S +++ b/arch/powerpc/kernel/misc.S @@ -114,7 +114,3 @@ _GLOBAL(longjmp) mtlr r0 mr r3,r4 blr - -_GLOBAL(current_stack_pointer) - PPC_LL r3,0(r1) - blr diff --git a/arch/powerpc/kernel/ppc_ksyms.c b/arch/powerpc/kernel/ppc_ksyms.c index 9f01e28..eb5c5dc 100644 --- a/arch/powerpc/kernel/ppc_ksyms.c +++ b/arch/powerpc/kernel/ppc_ksyms.c @@ -33,5 +33,3 @@ EXPORT_SYMBOL(store_vr_state); #ifdef CONFIG_EPAPR_PARAVIRT EXPORT_SYMBOL(epapr_hypercall_start); #endif - -EXPORT_SYMBOL(current_stack_pointer); -- 2.1.0
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