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kbuild: disable sparse warnings about unknown attributes

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Currently, sparse issues warnings on code using an attribute
it doesn't know about.

One of the problem with this is that these warnings have no
value for the developer, it's just noise for him. At best these
warnings tell something about some deficiencies of sparse itself
but not about a potential problem with code analyzed.

A second problem with this is that sparse release are, alas,
less frequent than new attributes are added to GCC.

So, avoid the noise by asking sparse to not warn about
attributes it doesn't know about.

Reference: https://marc.info/?l=linux-sparse&m=151871600016790
Reference: https://marc.info/?l=linux-sparse&m=151871725417322
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Luc Van Oostenryck 2018-02-15 22:07:50 +01:00 committed by Masahiro Yamada
parent 61277981dd
commit 6c49f359ca
1 changed files with 1 additions and 1 deletions
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2
Makefile
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@ -388,7 +388,7 @@ PYTHON = python
CHECK = sparse CHECK = sparse
CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
-Wbitwise -Wno-return-void $(CF) -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
NOSTDINC_FLAGS = NOSTDINC_FLAGS =
CFLAGS_MODULE = CFLAGS_MODULE =
AFLAGS_MODULE = AFLAGS_MODULE =