The patch titled
unable to boot with gcov on x86_64
has been added to the -mm tree. Its filename is
gcov-architecture-specific-compile-flag-adjustments-x86_64-fix-2.patch
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------------------------------------------------------
Subject: unable to boot with gcov on x86_64
From: Mariusz Kozlowski <m.kozlowski@xxxxxxxxxx>
I'm seeing similar GCOV problems as with 2.6.26-rc5-mm1 that you fixed.
This is the same x86_64 box and again it was unable to boot with gcov
enabled. A quick look revealed that arch/x86/kernel/tsc_64.c and
arch/x86/kernel/tsc_32.ccode was unified. Unfortunately simple change of
GCOV_tsc_32.o := n
GCOV_tsc_64.o := n
to
GCOV_tsc.o := n
did not help. Given the amount of combinations of which set of files with
GCOV might cause failures I was rather fortunate and after a few hours I
was able to pinpoint exactly two files which need GCOV disabled to make my
x86_64 boot.
Signed-off-by: Mariusz Kozlowski <m.kozlowski@xxxxxxxxxx>
Cc: Peter Oberparleiter <peter.oberparleiter@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/Makefile | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN arch/x86/kernel/Makefile~gcov-architecture-specific-compile-flag-adjustments-x86_64-fix-2 arch/x86/kernel/Makefile
--- a/arch/x86/kernel/Makefile~gcov-architecture-specific-compile-flag-adjustments-x86_64-fix-2
+++ a/arch/x86/kernel/Makefile
@@ -13,8 +13,8 @@ CFLAGS_REMOVE_rtc.o = -pg
CFLAGS_REMOVE_paravirt.o = -pg
endif
-GCOV_tsc_32.o := n
-GCOV_tsc_64.o := n
+GCOV_vsyscall_64.o := n
+GCOV_tsc.o := n
#
# vsyscalls (which work on the user stack) should have
_
Patches currently in -mm which might be from m.kozlowski@xxxxxxxxxx are
gcov-architecture-specific-compile-flag-adjustments-x86_64-fix.patch
gcov-architecture-specific-compile-flag-adjustments-x86_64-fix-2.patch
reiser4.patch
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