Commit 7599ea8b authored Jan 12, 2016 by Lee Jones Committed by Michal Marek Jan 12, 2016

kbuild: Demote 'sign-compare' warning to W=2



Ideally, a kernel compile with W=1 enabled should complete cleanly;
however, when we run one currently we are presented with ~25k warnings.
'sign-compare' accounts for ~22k of those ~25k.

In this patch we're demoting 'sign-compare' warnings to W=2, with a view
to fixing the remaining 3k W=1 warnings required for a clean build.

Arnd adds:
  "As per our discussion, I'd add that this was inadvertedly introduced
   by Behan when he moved the clang specific warnings into an ifdef block
   and did not notice that -Wsign-compare was interpreted by both gcc
   and clang.

   Earlier, it was introduced in just the same way by Jan-Simon as part
   of 3d3d6b84 ("kbuild: LLVMLinux: Adapt warnings for compilation
   with clang")."

Acked-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 26ea6bb1 ("kbuild, LLVMLinux: Supress warnings unless W=1-3")
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Michal Marek <mmarek@suse.com>

parent 40ab87a4

scripts/Makefile.extrawarn

+2 −0

Original line number	Diff line number	Diff line
		@@ -25,6 +25,7 @@ warning-1 += -Wold-style-definition
		warning-1 += $(call cc-option, -Wmissing-include-dirs)
		warning-1 += $(call cc-option, -Wunused-but-set-variable)
		warning-1 += $(call cc-disable-warning, missing-field-initializers)
		warning-1 += $(call cc-disable-warning, sign-compare)

		warning-2 := -Waggregate-return
		warning-2 += -Wcast-align
		@@ -33,6 +34,7 @@ warning-2 += -Wnested-externs
		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-3 := -Wbad-function-cast
		warning-3 += -Wcast-qual