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x86: Mark OPTIMIZE_INLINING broken

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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 <bunk@kernel.org>
Cc: David Miller <davem@davemloft.net>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2008-04-30 19:50:03 -07:00
parent 958a2f29a6
commit 6d98ca7364
1 changed files with 1 additions and 0 deletions
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arch/x86/Kconfig.debug
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@ -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