Commit 81423c37 authored Mar 29, 2019 by Andi Kleen Committed by Thomas Gleixner Apr 19, 2019

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@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20190330004743.29541-4-andi@firstfloor.org

parent 0f0b7e1c

arch/x86/lib/delay.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;