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authorArnd Bergmann <arnd@arndb.de>2016-04-25 17:35:31 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-09-30 10:18:35 +0200
commit7cd4d22328dc4a019e00508c66ecd4cd837597b5 (patch)
tree00207079c4f0ccae2a518f3ef0ca5e7555b5ee33
parent605623774e714a460bec332d81ab3da194a26ae3 (diff)
downloadlinux-linaro-stable-7cd4d22328dc4a019e00508c66ecd4cd837597b5.tar.gz
gcov: disable -Wmaybe-uninitialized warning
commit e72e2dfe7c16ffbfbabf9cb24adc6d9f93a4fe37 upstream. When gcov profiling is enabled, we see a lot of spurious warnings about possibly uninitialized variables being used: arch/arm/mm/dma-mapping.c: In function 'arm_coherent_iommu_map_page': arch/arm/mm/dma-mapping.c:1085:16: warning: 'start' may be used uninitialized in this function [-Wmaybe-uninitialized] drivers/clk/st/clk-flexgen.c: In function 'st_of_flexgen_setup': drivers/clk/st/clk-flexgen.c:323:9: warning: 'num_parents' may be used uninitialized in this function [-Wmaybe-uninitialized] kernel/cgroup.c: In function 'cgroup_mount': kernel/cgroup.c:2119:11: warning: 'root' may be used uninitialized in this function [-Wmaybe-uninitialized] All of these are false positives, so it seems better to just disable the warnings whenever GCOV is enabled. Most users don't enable GCOV, and based on a prior patch, it is now also disabled for 'allmodconfig' builds, so there should be no downsides of doing this. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Michal Marek <mmarek@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index d10cd0965388..4cd7eb14863d 100644
--- a/Makefile
+++ b/Makefile
@@ -368,7 +368,7 @@ AFLAGS_MODULE =
LDFLAGS_MODULE =
CFLAGS_KERNEL =
AFLAGS_KERNEL =
-CFLAGS_GCOV = -fprofile-arcs -ftest-coverage -fno-tree-loop-im
+CFLAGS_GCOV = -fprofile-arcs -ftest-coverage -fno-tree-loop-im -Wno-maybe-uninitialized
# Use USERINCLUDE when you must reference the UAPI directories only.