[PATCH 1/6] Kbuild: compile kernel with gnu11 std

[Xiaomeng Tong]

This patch is suggested by linus[1], there may be some corner cases which
should be considered before merge, and is just for prove PATCH 2.

[1]: https://lore.kernel.org/all/CAHk-=wh97QY9fEQUK6zMVQwaQ_JWDvR=R+TxQ_0OYrMHQ+egvQ@xxxxxxxxxxxxxx/

Signed-off-by: Xiaomeng Tong <xiam0nd.tong@xxxxxxxxx>
---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 289ce2be8..84a96ae3c 100644
--- a/Makefile
+++ b/Makefile
@@ -515,7 +515,7 @@ KBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
 		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
 		   -Werror=implicit-function-declaration -Werror=implicit-int \
 		   -Werror=return-type -Wno-format-security \
-		   -std=gnu89
+		   -std=gnu11 -Wno-shift-negative-value
 KBUILD_CPPFLAGS := -D__KERNEL__
 KBUILD_AFLAGS_KERNEL :=
 KBUILD_CFLAGS_KERNEL :=
-- 
2.17.1