From 6d98ca736441029e4e87ad3b6dc4a8645dc4c6d3 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Wed, 30 Apr 2008 19:50:03 -0700 Subject: [PATCH] x86: Mark OPTIMIZE_INLINING broken So Ingo finally did figure out why UML broke with this option: UML passes gcc the -fno-unit-at-a-time flag, and apparently that wreaks havoc with gcc's inlining. We could turn off -fno-unit-at-a-time for UML for gcc4+ (which is what x86 does), but there's bad blood about this whole option, and it does show that the thing is just fragile as heck. So let tempers cool, and disable the thing, and we can revisit the decision later. Cc: Adrian Bunk Cc: David Miller Acked-by: Ingo Molnar Signed-off-by: Linus Torvalds --- arch/x86/Kconfig.debug | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index 5fc8d0b3191d..ac1e31ba4795 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -257,6 +257,7 @@ config CPA_DEBUG config OPTIMIZE_INLINING bool "Allow gcc to uninline functions marked 'inline'" + depends on BROKEN help This option determines if the kernel forces gcc to inline the functions developers have marked 'inline'. Doing so takes away freedom from gcc to