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authorAndi Kleen <andi@firstfloor.org>2010-02-02 14:40:02 -0800
committerMichal Marek <mmarek@suse.cz>2010-02-05 23:21:18 +0100
commitd0679c730395d0bde9a46939e7ba255b4ba7dd7c (patch)
treed6b6514d90826a2a52c463a944a301e267aeb30f /Makefile
parent59dde3853e07aaadc2b63abd16c954d5b0606cf1 (diff)
downloadlinux-2.6.34-ux500-d0679c730395d0bde9a46939e7ba255b4ba7dd7c.tar.gz
kbuild: move -fno-dwarf2-cfi-asm to powerpc only
Better dwarf2 unwind information is a good thing, it allows better debugging with kgdb and crash and helps systemtap. Commit 003086497f07f7f1e67c0c295e261740f822b377 ("Build with -fno-dwarf2-cfi-asm") disabled some CFI information globally to work around a module loader bug on powerpc. But this disables the better unwind tables for all architectures, not just powerpc. Move the workaround to powerpc and also add a suitable comment that's it really a workaround. This improves dwarf2 unwind tables on x86 at least. Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Kyle McMartin <kyle@mcmartin.ca> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile3
1 files changed, 0 insertions, 3 deletions
diff --git a/Makefile b/Makefile
index 03053c66bb3..2e74a68878c 100644
--- a/Makefile
+++ b/Makefile
@@ -579,9 +579,6 @@ KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
# disable invalid "can't wrap" optimizations for signed / pointers
KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
-# revert to pre-gcc-4.4 behaviour of .eh_frame
-KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
-
# conserve stack if available
KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)