fs/ntfs3: add a subset of W=1 warnings for stricter checks

Enable a subset of W=1-style compiler warnings for the ntfs3 tree so we
catch small bugs early (unused symbols, missing declarations/prototypes,
possible uninitialized/mis-sized uses, etc).

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>

diff --git a/fs/ntfs3/Makefile b/fs/ntfs3/Makefile
index 279701b62bbeaed684abc1e2a4d448f71c403e95..53bf2c17ac286d22b2ef2ca061204af2f73aa237 100644 (file)
--- a/fs/ntfs3/Makefile
+++ b/fs/ntfs3/Makefile
@@ -3,6 +3,26 @@
 # Makefile for the ntfs3 filesystem support.
 #
 
+# Subset of W=1 warnings
+subdir-ccflags-y += -Wextra -Wunused -Wno-unused-parameter
+subdir-ccflags-y += -Wmissing-declarations
+subdir-ccflags-y += -Wmissing-format-attribute
+subdir-ccflags-y += -Wmissing-prototypes
+subdir-ccflags-y += -Wold-style-definition
+subdir-ccflags-y += -Wmissing-include-dirs
+condflags := \
+       $(call cc-option, -Wunused-but-set-variable)            \
+       $(call cc-option, -Wunused-const-variable)              \
+       $(call cc-option, -Wpacked-not-aligned)                 \
+       $(call cc-option, -Wstringop-truncation)                \
+       $(call cc-option, -Wmaybe-uninitialized)
+subdir-ccflags-y += $(condflags)
+# The following turn off the warnings enabled by -Wextra
+subdir-ccflags-y += -Wno-missing-field-initializers
+subdir-ccflags-y += -Wno-sign-compare
+subdir-ccflags-y += -Wno-type-limits
+subdir-ccflags-y += -Wno-shift-negative-value
+
 # to check robot warnings
 ccflags-y += -Wint-to-pointer-cast \
        $(call cc-option,-Wunused-but-set-variable,-Wunused-const-variable) \