Commit-ID: 81423c37415fe45057d64196ae0ce8e17a9c7148
Gitweb: https://git.kernel.org/tip/81423c37415fe45057d64196ae0ce8e17a9c7148
Author: Andi Kleen <ak@xxxxxxxxxxxxxxx>
AuthorDate: Fri, 29 Mar 2019 17:47:38 -0700
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Fri, 19 Apr 2019 17:49:47 +0200
x86/timer: Don't inline __const_udelay()
LTO will happily inline __const_udelay() everywhere it is used. Forcing it
noinline saves ~44k text in a LTO build.
13999560 1740864 1499136 17239560 1070e08 vmlinux-with-udelay-inline
13954764 1736768 1499136 17190668 1064f0c vmlinux-wo-udelay-inline
Even without LTO this function should never be inlined.
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/20190330004743.29541-4-andi@xxxxxxxxxxxxxx
---
arch/x86/lib/delay.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/lib/delay.c b/arch/x86/lib/delay.c
index f5b7f1b3b6d7..b7375dc6898f 100644
--- a/arch/x86/lib/delay.c
+++ b/arch/x86/lib/delay.c
@@ -162,7 +162,7 @@ void __delay(unsigned long loops)
}
EXPORT_SYMBOL(__delay);
-void __const_udelay(unsigned long xloops)
+noinline void __const_udelay(unsigned long xloops)
{
unsigned long lpj = this_cpu_read(cpu_info.loops_per_jiffy) ? : loops_per_jiffy;
int d0;
|