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| author | Arnd Bergmann <arnd@arndb.de> | 2016-04-25 17:35:31 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-09-30 10:18:35 +0200 |
| commit | 7cd4d22328dc4a019e00508c66ecd4cd837597b5 (patch) | |
| tree | 00207079c4f0ccae2a518f3ef0ca5e7555b5ee33 /Makefile | |
| parent | 605623774e714a460bec332d81ab3da194a26ae3 (diff) | |
| download | lwn-7cd4d22328dc4a019e00508c66ecd4cd837597b5.tar.gz lwn-7cd4d22328dc4a019e00508c66ecd4cd837597b5.zip | |
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>
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
@@ -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. |