From 0faa22f09caadc11af2aa7570870ebd2ac5b8170 Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Sun, 20 Dec 2020 18:18:26 +0000 Subject: [PATCH] powerpc/time: Force inlining of get_tb() Force inlining of get_tb() in order to avoid getting following function in vdso32, leading to suboptimal performance in clock_gettime() 00000688 <.get_tb>: 688: 7c 6d 42 a6 mftbu r3 68c: 7c 8c 42 a6 mftb r4 690: 7d 2d 42 a6 mftbu r9 694: 7c 03 48 40 cmplw r3,r9 698: 40 e2 ff f0 bne+ 688 <.get_tb> 69c: 4e 80 00 20 blr Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/df05d53eed1210cf1aa76d1fb44aa0fab29c018e.1608488286.git.christophe.leroy@csgroup.eu --- arch/powerpc/include/asm/vdso/timebase.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/include/asm/vdso/timebase.h b/arch/powerpc/include/asm/vdso/timebase.h index b558b07..881f655 100644 --- a/arch/powerpc/include/asm/vdso/timebase.h +++ b/arch/powerpc/include/asm/vdso/timebase.h @@ -49,7 +49,7 @@ static inline unsigned long get_tbl(void) return mftb(); } -static inline u64 get_tb(void) +static __always_inline u64 get_tb(void) { unsigned int tbhi, tblo, tbhi2; -- 2.7.4