s390: enable KCSAN

s390x GCC and SystemZ Clang have ThreadSanitizer support now [1] [2],
so enable KCSAN for s390.

[1] https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=ea22954e7c58
[2] https://reviews.llvm.org/D105629

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index f20467a..92c0a1b 100644 (file)
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -138,6 +138,7 @@ config S390
        select HAVE_ARCH_JUMP_LABEL_RELATIVE
        select HAVE_ARCH_KASAN
        select HAVE_ARCH_KASAN_VMALLOC
+       select HAVE_ARCH_KCSAN
        select HAVE_ARCH_KFENCE
        select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
        select HAVE_ARCH_SECCOMP_FILTER

diff --git a/arch/s390/boot/Makefile b/arch/s390/boot/Makefile
index 48cec16..ed41a1a 100644 (file)
--- a/arch/s390/boot/Makefile
+++ b/arch/s390/boot/Makefile
@@ -7,6 +7,7 @@ KCOV_INSTRUMENT := n
 GCOV_PROFILE := n
 UBSAN_SANITIZE := n
 KASAN_SANITIZE := n
+KCSAN_SANITIZE := n
 
 KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR)
 KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR)

diff --git a/arch/s390/boot/compressed/Makefile b/arch/s390/boot/compressed/Makefile
index 660c799..616cc54 100644 (file)
--- a/arch/s390/boot/compressed/Makefile
+++ b/arch/s390/boot/compressed/Makefile
@@ -9,6 +9,7 @@ KCOV_INSTRUMENT := n
 GCOV_PROFILE := n
 UBSAN_SANITIZE := n
 KASAN_SANITIZE := n
+KCSAN_SANITIZE := n
 
 obj-y  := $(if $(CONFIG_KERNEL_UNCOMPRESSED),,decompressor.o) info.o
 obj-all := $(obj-y) piggy.o syms.o

diff --git a/arch/s390/kernel/vdso32/Makefile b/arch/s390/kernel/vdso32/Makefile
index 3457dcf..e3e6ac5 100644 (file)
--- a/arch/s390/kernel/vdso32/Makefile
+++ b/arch/s390/kernel/vdso32/Makefile
@@ -36,6 +36,7 @@ CPPFLAGS_vdso32.lds += -P -C -U$(ARCH)
 GCOV_PROFILE := n
 UBSAN_SANITIZE := n
 KASAN_SANITIZE := n
+KCSAN_SANITIZE := n
 
 # Force dependency (incbin is bad)
 $(obj)/vdso32_wrapper.o : $(obj)/vdso32.so

diff --git a/arch/s390/kernel/vdso64/Makefile b/arch/s390/kernel/vdso64/Makefile
index 2a2092c..6568de2 100644 (file)
--- a/arch/s390/kernel/vdso64/Makefile
+++ b/arch/s390/kernel/vdso64/Makefile
@@ -39,6 +39,7 @@ CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
 GCOV_PROFILE := n
 UBSAN_SANITIZE := n
 KASAN_SANITIZE := n
+KCSAN_SANITIZE := n
 
 # Force dependency (incbin is bad)
 $(obj)/vdso64_wrapper.o : $(obj)/vdso64.so

diff --git a/arch/s390/purgatory/Makefile b/arch/s390/purgatory/Makefile
index 21c4ebe..360ada8 100644 (file)
--- a/arch/s390/purgatory/Makefile
+++ b/arch/s390/purgatory/Makefile
@@ -19,6 +19,7 @@ KCOV_INSTRUMENT := n
 GCOV_PROFILE := n
 UBSAN_SANITIZE := n
 KASAN_SANITIZE := n
+KCSAN_SANITIZE := n
 
 KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes
 KBUILD_CFLAGS += -Wno-pointer-sign -Wno-sign-compare