VisionFive2 Linux kernel

author: Linus Torvalds <torvalds@linux-foundation.org> 2020-08-04 13:38:35 -0700 committer: Linus Torvalds <torvalds@linux-foundation.org> 2020-08-04 13:38:35 -0700 commit: 5b5d3be5d690a94be390ccf3e4db8dcb7409bf75 parent: 3e4a12a1bafafecaf1631f02099e82b424967718

Commit Summary:

Merge tag 'var-init-v5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Diffstat:

1 file changed, 11 insertions, 2 deletions

diff --git a/Makefile b/Makefile
index aef9ca61caf0..09c1bd1fcb64 100644
--- a/Makefile
+++ b/Makefile
@@ -803,11 +803,20 @@ KBUILD_CFLAGS	+= -fomit-frame-pointer
 endif
 endif
 
-# Initialize all stack variables with a pattern, if desired.
-ifdef CONFIG_INIT_STACK_ALL
+# Initialize all stack variables with a 0xAA pattern.
+ifdef CONFIG_INIT_STACK_ALL_PATTERN
 KBUILD_CFLAGS	+= -ftrivial-auto-var-init=pattern
 endif
 
+# Initialize all stack variables with a zero value.
+ifdef CONFIG_INIT_STACK_ALL_ZERO
+# Future support for zero initialization is still being debated, see
+# https://bugs.llvm.org/show_bug.cgi?id=45497. These flags are subject to being
+# renamed or dropped.
+KBUILD_CFLAGS	+= -ftrivial-auto-var-init=zero
+KBUILD_CFLAGS	+= -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
+endif
+
 DEBUG_CFLAGS	:= $(call cc-option, -fno-var-tracking-assignments)
 
 ifdef CONFIG_DEBUG_INFO