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authorIngo Molnar <mingo@kernel.org>2020-04-13 09:44:39 +0200
committerIngo Molnar <mingo@kernel.org>2020-04-13 09:44:39 +0200
commit3b02a051d25d9600e9d403ad3043aed7de00160e (patch)
tree5b8f58b79328c04654bf5ab6286401057edeca8f /scripts/Kconfig.include
parentkcsan, trace: Make KCSAN compatible with tracing (diff)
parentLinux 5.7-rc1 (diff)
downloadlinux-3b02a051d25d9600e9d403ad3043aed7de00160e.tar.xz
linux-3b02a051d25d9600e9d403ad3043aed7de00160e.zip
Merge tag 'v5.7-rc1' into locking/kcsan, to resolve conflicts and refresh
Resolve these conflicts: arch/x86/Kconfig arch/x86/kernel/Makefile Do a minor "evil merge" to move the KCSAN entry up a bit by a few lines in the Kconfig to reduce the probability of future conflicts. Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'scripts/Kconfig.include')
-rw-r--r--scripts/Kconfig.include9
1 files changed, 6 insertions, 3 deletions
diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include
index 496d11c92c97..c264da2b9b30 100644
--- a/scripts/Kconfig.include
+++ b/scripts/Kconfig.include
@@ -31,6 +31,12 @@ cc-option = $(success,$(CC) -Werror $(CLANG_FLAGS) $(1) -S -x c /dev/null -o /de
# Return y if the linker supports <flag>, n otherwise
ld-option = $(success,$(LD) -v $(1))
+# $(as-option,<flag>)
+# /dev/zero is used as output instead of /dev/null as some assembler cribs when
+# both input and output are same. Also both of them have same write behaviour so
+# can be easily substituted.
+as-option = $(success, $(CC) $(CLANG_FLAGS) $(1) -c -x assembler /dev/null -o /dev/zero)
+
# $(as-instr,<instr>)
# Return y if the assembler supports <instr>, n otherwise
as-instr = $(success,printf "%b\n" "$(1)" | $(CC) $(CLANG_FLAGS) -c -x assembler -o /dev/null -)
@@ -42,9 +48,6 @@ $(error-if,$(failure,command -v $(LD)),linker '$(LD)' not found)
# Fail if the linker is gold as it's not capable of linking the kernel proper
$(error-if,$(success, $(LD) -v | grep -q gold), gold linker '$(LD)' not supported)
-# gcc version including patch level
-gcc-version := $(shell,$(srctree)/scripts/gcc-version.sh $(CC))
-
# machine bit flags
# $(m32-flag): -m32 if the compiler supports it, or an empty string otherwise.
# $(m64-flag): -m64 if the compiler supports it, or an empty string otherwise.