Commit-ID: b8b7d791a8ff01d2380089279a69afa99115fb23 Gitweb: http://git.kernel.org/tip/b8b7d791a8ff01d2380089279a69afa99115fb23 Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx> AuthorDate: Sat, 28 Nov 2009 15:03:03 +0100 Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CommitDate: Sat, 28 Nov 2009 15:08:30 +0100 x86: Use -maccumulate-outgoing-args for sane mcount prologues commit 746357d (x86: Prevent GCC 4.4.x (pentium-mmx et al) function prologue wreckage) uses -mtune=generic to work around the function prologue problem with mcount on -march=pentium-mmx and others. Jakub pointed out that we can use -maccumulate-outgoing-args instead which is selected by -mtune=generic and prevents the problem without losing the -march specific optimizations. Pointed-out-by: Jakub Jelinek <jakub@xxxxxxxxxx> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: stable@xxxxxxxxxx --- arch/x86/Makefile_32.cpu | 5 +++-- 1 files changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/x86/Makefile_32.cpu b/arch/x86/Makefile_32.cpu index df7fdf8..1937226 100644 --- a/arch/x86/Makefile_32.cpu +++ b/arch/x86/Makefile_32.cpu @@ -49,8 +49,9 @@ cflags-$(CONFIG_X86_GENERIC) += $(call tune,generic,$(call tune,i686)) # Work around the pentium-mmx code generator madness of gcc4.4.x which # does stack alignment by generating horrible code _before_ the mcount # prologue (push %ebp, mov %esp, %ebp) which breaks the function graph -# tracer assumptions -cflags-$(CONFIG_FUNCTION_GRAPH_TRACER) += $(call cc-option,-mtune=generic) +# tracer assumptions. For i686, generic, core2 this is set by the +# compiler anyway +cflags-$(CONFIG_FUNCTION_GRAPH_TRACER) += $(call cc-option,-maccumulate-outgoing-args) # Bug fix for binutils: this option is required in order to keep # binutils from generating NOPL instructions against our will. -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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