The patch titled gcov: fix run-time error on x86_64 has been added to the -mm tree. Its filename is gcov-architecture-specific-compile-flag-adjustments-x86_64-fix.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: gcov: fix run-time error on x86_64 From: Peter Oberparleiter <peter.oberparleiter@xxxxxxxxxx> Disable profiling of tsc_$(BITS).o to fix a run-time error when using CONFIG_GCOV_PROFILE_ALL on x86_64: bash[498] segfault at ffffffff80868b58 ip ffffffffff600412 sp 7fffa3d010f0 error 7 init[1] segfault at ffffffff80868b58 ip ffffffffff600412 sp 7fff9e97f640 error 7 init[1] segfault at ffffffff80868b58 ip ffffffffff600412 sp 7fff9e97eed0 error 7 Kernel panic - not syncing: Attemted to kill init! Pid 1, comm: init Not tainted 2.6.26-rc5-mm1 #1 m.kozlowski@xxxxxxxxxx wrote: > After a few hours and tons of reboots I narrowed it down to > arch/x86/kernel/Makefile: > > a) works > obj-y += tsc_$(BITS).o io_delay.o rtc.o > GCOV_tsc_$(BITS).o := n > #GCOV_io_delay.o := n > #GCOV_rtc.o := n > > b) doesn't work > obj-y += tsc_$(BITS).o io_delay.o rtc.o > #GCOV_tsc_$(BITS).o := n > #GCOV_io_delay.o := n > #GCOV_rtc.o := n > > and that points to arch/x86/kernel/tsc_64.c Reported-by: Mariusz Kozlowski <m.kozlowski@xxxxxxxxxx> Reviewed-by: Mariusz Kozlowski <m.kozlowski@xxxxxxxxxx> Reviewed-by: Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx> Signed-off-by: Peter Oberparleiter <peter.oberparleiter@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- arch/x86/kernel/Makefile | 3 +++ 1 file changed, 3 insertions(+) diff -puN arch/x86/kernel/Makefile~gcov-architecture-specific-compile-flag-adjustments-x86_64-fix arch/x86/kernel/Makefile --- a/arch/x86/kernel/Makefile~gcov-architecture-specific-compile-flag-adjustments-x86_64-fix +++ a/arch/x86/kernel/Makefile @@ -13,6 +13,9 @@ CFLAGS_REMOVE_tsc_32.o = -pg CFLAGS_REMOVE_rtc.o = -pg endif +GCOV_tsc_32.o := n +GCOV_tsc_64.o := n + # # vsyscalls (which work on the user stack) should have # no stack-protector checks: _ Patches currently in -mm which might be from peter.oberparleiter@xxxxxxxxxx are s390-cio-use-memory_read_from_buffer.patch kernel-call-constructors.patch kernel-call-constructors-uml-fix-1.patch kernel-call-constructors-uml-fix-2.patch kernel-introduce-gcc_version_lower-macro.patch seq_file-add-function-to-write-binary-data.patch gcov-add-gcov-profiling-infrastructure.patch gcov-add-gcov-profiling-infrastructure-revert-link-changes.patch gcov-create-links-to-gcda-files-in-build-directory.patch gcov-architecture-specific-compile-flag-adjustments.patch gcov-architecture-specific-compile-flag-adjustments-powerpc-moved-stuff.patch gcov-architecture-specific-compile-flag-adjustments-powerpc-fix.patch gcov-architecture-specific-compile-flag-adjustments-x86_64-fix.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html