mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 07:26:26 +07:00
afe956c577
Currently, we disable -Wtautological-compare, which in turn disables a bunch of more specific tautological comparison warnings that are useful for the kernel such as -Wtautological-bitwise-compare. See clang's documentation below for the other warnings that are suppressed by -Wtautological-compare. Now that all of the major/noisy warnings have been fixed, enable -Wtautological-compare so that more issues can be caught at build time by various continuous integration setups. -Wtautological-constant-out-of-range-compare is kept disabled under a normal build but visible at W=1 because there are places in the kernel where a constant or variable size can change based on the kernel configuration. These are not fixed in a clean/concise way and the ones I have audited so far appear to be harmless. It is not a subgroup but rather just one warning so we do not lose out on much coverage by default. Link: https://github.com/ClangBuiltLinux/linux/issues/488 Link: http://releases.llvm.org/10.0.0/tools/clang/docs/DiagnosticsReference.html#wtautological-compare Link: https://bugs.llvm.org/show_bug.cgi?id=42666 Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
94 lines
2.7 KiB
Makefile
94 lines
2.7 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
|
|
# ==========================================================================
|
|
# make W=... settings
|
|
#
|
|
# There are three warning groups enabled by W=1, W=2, W=3.
|
|
# They are independent, and can be combined like W=12 or W=123.
|
|
# ==========================================================================
|
|
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, packed-not-aligned)
|
|
|
|
# backward compatibility
|
|
KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)
|
|
|
|
ifeq ("$(origin W)", "command line")
|
|
KBUILD_EXTRA_WARN := $(W)
|
|
endif
|
|
|
|
export KBUILD_EXTRA_WARN
|
|
|
|
#
|
|
# W=1 - warnings which may be relevant and do not occur too often
|
|
#
|
|
ifneq ($(findstring 1, $(KBUILD_EXTRA_WARN)),)
|
|
|
|
KBUILD_CFLAGS += -Wextra -Wunused -Wno-unused-parameter
|
|
KBUILD_CFLAGS += -Wmissing-declarations
|
|
KBUILD_CFLAGS += -Wmissing-format-attribute
|
|
KBUILD_CFLAGS += -Wmissing-prototypes
|
|
KBUILD_CFLAGS += -Wold-style-definition
|
|
KBUILD_CFLAGS += -Wmissing-include-dirs
|
|
KBUILD_CFLAGS += $(call cc-option, -Wunused-but-set-variable)
|
|
KBUILD_CFLAGS += $(call cc-option, -Wunused-const-variable)
|
|
KBUILD_CFLAGS += $(call cc-option, -Wpacked-not-aligned)
|
|
KBUILD_CFLAGS += $(call cc-option, -Wstringop-truncation)
|
|
# The following turn off the warnings enabled by -Wextra
|
|
KBUILD_CFLAGS += -Wno-missing-field-initializers
|
|
KBUILD_CFLAGS += -Wno-sign-compare
|
|
|
|
KBUILD_CPPFLAGS += -DKBUILD_EXTRA_WARN1
|
|
|
|
else
|
|
|
|
# Some diagnostics enabled by default are noisy.
|
|
# Suppress them by using -Wno... except for W=1.
|
|
|
|
ifdef CONFIG_CC_IS_CLANG
|
|
KBUILD_CFLAGS += -Wno-initializer-overrides
|
|
KBUILD_CFLAGS += -Wno-format
|
|
KBUILD_CFLAGS += -Wno-sign-compare
|
|
KBUILD_CFLAGS += -Wno-format-zero-length
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, pointer-to-enum-cast)
|
|
KBUILD_CFLAGS += -Wno-tautological-constant-out-of-range-compare
|
|
endif
|
|
|
|
endif
|
|
|
|
#
|
|
# W=2 - warnings which occur quite often but may still be relevant
|
|
#
|
|
ifneq ($(findstring 2, $(KBUILD_EXTRA_WARN)),)
|
|
|
|
KBUILD_CFLAGS += -Wcast-align
|
|
KBUILD_CFLAGS += -Wdisabled-optimization
|
|
KBUILD_CFLAGS += -Wnested-externs
|
|
KBUILD_CFLAGS += -Wshadow
|
|
KBUILD_CFLAGS += $(call cc-option, -Wlogical-op)
|
|
KBUILD_CFLAGS += -Wmissing-field-initializers
|
|
KBUILD_CFLAGS += -Wsign-compare
|
|
KBUILD_CFLAGS += $(call cc-option, -Wmaybe-uninitialized)
|
|
KBUILD_CFLAGS += $(call cc-option, -Wunused-macros)
|
|
|
|
KBUILD_CPPFLAGS += -DKBUILD_EXTRA_WARN2
|
|
|
|
endif
|
|
|
|
#
|
|
# W=3 - more obscure warnings, can most likely be ignored
|
|
#
|
|
ifneq ($(findstring 3, $(KBUILD_EXTRA_WARN)),)
|
|
|
|
KBUILD_CFLAGS += -Wbad-function-cast
|
|
KBUILD_CFLAGS += -Wcast-qual
|
|
KBUILD_CFLAGS += -Wconversion
|
|
KBUILD_CFLAGS += -Wpacked
|
|
KBUILD_CFLAGS += -Wpadded
|
|
KBUILD_CFLAGS += -Wpointer-arith
|
|
KBUILD_CFLAGS += -Wredundant-decls
|
|
KBUILD_CFLAGS += -Wswitch-default
|
|
KBUILD_CFLAGS += $(call cc-option, -Wpacked-bitfield-compat)
|
|
|
|
KBUILD_CPPFLAGS += -DKBUILD_EXTRA_WARN3
|
|
|
|
endif
|