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kbuild: Remove unnecessary -Wno-unused-value

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This flag turns off several other warnings that would
be useful. Most notably -warn_unused_result is disabled.
All of the following warnings are currently disabled:

UnusedValue
|-UnusedComparison
  |-warn_unused_comparison
|-UnusedResult
  |-warn_unused_result
|-UnevaluatedExpression
  |-PotentiallyEvaluatedExpression
    |-warn_side_effects_typeid
  |-warn_side_effects_unevaluated_context
|-warn_unused_expr
|-warn_unused_voidptr
|-warn_unused_container_subscript_expr
|-warn_unused_call

With this flag removed there are ~10 warnings.
Patches have been submitted for each of these warnings.

Reported-by: Nick Desaulniers <ndesaulniers@google.com>
Cc: clang-built-linux@googlegroups.com
Link: https://github.com/ClangBuiltLinux/linux/issues/520
Signed-off-by: Nathan Huckleberry <nhuck@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Nathan Huckleberry 2019-06-17 10:28:29 -07:00 committed by Masahiro Yamada
parent 72ad21075d
commit 4df607cc6f
1 changed files with 0 additions and 1 deletions
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1
scripts/Makefile.extrawarn
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@ -67,7 +67,6 @@ else
ifdef CONFIG_CC_IS_CLANG ifdef CONFIG_CC_IS_CLANG
KBUILD_CFLAGS += -Wno-initializer-overrides KBUILD_CFLAGS += -Wno-initializer-overrides
KBUILD_CFLAGS += -Wno-unused-value
KBUILD_CFLAGS += -Wno-format KBUILD_CFLAGS += -Wno-format
KBUILD_CFLAGS += -Wno-sign-compare KBUILD_CFLAGS += -Wno-sign-compare
KBUILD_CFLAGS += -Wno-format-zero-length KBUILD_CFLAGS += -Wno-format-zero-length