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authorLinus Torvalds <torvalds@linux-foundation.org>2016-11-11 21:03:01 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-11-11 21:03:01 +0300
commit015ed9433be2b476ec7e2e6a9a411a56e3b5b035 (patch)
tree2e9943e5e548f8adc9001a485482a7fcaaa4c067 /scripts
parent968ef8de555bf3ff6dda467e53660b4144ba0ee1 (diff)
parent4324cb23f4569edcf76e637cdb3c1dfe8e8a85e4 (diff)
downloadlinux-015ed9433be2b476ec7e2e6a9a411a56e3b5b035.tar.xz
Merge branch 'maybe-uninitialized' (patches from Arnd)
Merge fixes for -Wmaybe-uninitialized from Arnd Bergmann: "It took a while for some patches to make it into mainline through maintainer trees, but the 28-patch series is now reduced to 10, with one tiny patch added at the end. Aside from patches that are no longer required, I did these changes compared to version 1: - Dropped "iio: maxim_thermocouple: detect invalid storage size in read()", which is currently in linux-next as commit 32cb7d27e65d. This is the only remaining warning I see for a couple of corner cases (kbuild bot reports it on blackfin, kernelci bot and arm-soc bot both report it on arm64) - Dropped "brcmfmac: avoid maybe-uninitialized warning in brcmf_cfg80211_start_ap", which is currently in net/master merge pending. - Dropped two x86 patches, "x86: math-emu: possible uninitialized variable use" and "x86: mark target address as output in 'insb' asm" as they do not seem to trigger for a default build, and I got no feedback on them. Both of these are ancient issues and seem harmless, I will send them again to the x86 maintainers once the rest is merged. - Dropped "rbd: false-postive gcc-4.9 -Wmaybe-uninitialized" based on feedback from Ilya Dryomov, who already has a different fix queued up for v4.10. The kbuild bot reports this as a warning for xtensa. - Replaced "crypto: aesni: avoid -Wmaybe-uninitialized warning" with a simpler patch, this one always triggers but my first solution would not be safe for linux-4.9 any more at this point. I'll follow up with the larger patch as a cleanup for 4.10. - Replaced "dib0700: fix nec repeat handling" with a better one, contributed by Sean Young" * -Wmaybe-uninitialized fixes: Kbuild: enable -Wmaybe-uninitialized warnings by default pcmcia: fix return value of soc_pcmcia_regulator_set infiniband: shut up a maybe-uninitialized warning crypto: aesni: shut up -Wmaybe-uninitialized warning rc: print correct variable for z8f0811 dib0700: fix nec repeat handling s390: pci: don't print uninitialized data for debugging nios2: fix timer initcall return value x86: apm: avoid uninitialized data NFSv4.1: work around -Wmaybe-uninitialized warning Kbuild: enable -Wmaybe-uninitialized warning for "make W=1"
Diffstat (limited to 'scripts')
-rw-r--r--scripts/Makefile.extrawarn1
-rw-r--r--scripts/Makefile.ubsan4
2 files changed, 5 insertions, 0 deletions
diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
index 53449a6ff6aa..7c321a603b07 100644
--- a/scripts/Makefile.extrawarn
+++ b/scripts/Makefile.extrawarn
@@ -36,6 +36,7 @@ warning-2 += -Wshadow
warning-2 += $(call cc-option, -Wlogical-op)
warning-2 += $(call cc-option, -Wmissing-field-initializers)
warning-2 += $(call cc-option, -Wsign-compare)
+warning-2 += $(call cc-option, -Wmaybe-uninitialized)
warning-3 := -Wbad-function-cast
warning-3 += -Wcast-qual
diff --git a/scripts/Makefile.ubsan b/scripts/Makefile.ubsan
index dd779c40c8e6..3b1b13818d59 100644
--- a/scripts/Makefile.ubsan
+++ b/scripts/Makefile.ubsan
@@ -17,4 +17,8 @@ endif
ifdef CONFIG_UBSAN_NULL
CFLAGS_UBSAN += $(call cc-option, -fsanitize=null)
endif
+
+ # -fsanitize=* options makes GCC less smart than usual and
+ # increase number of 'maybe-uninitialized false-positives
+ CFLAGS_UBSAN += $(call cc-option, -Wno-maybe-uninitialized)
endif