Makefile: remove redundant tool coverage variables

Now Kbuild provides reasonable defaults for objtool, sanitizers, and
profilers.

Remove redundant variables.

Note:

This commit changes the coverage for some objects:

  - include arch/mips/vdso/vdso-image.o into UBSAN, GCOV, KCOV
  - include arch/sparc/vdso/vdso-image-*.o into UBSAN
  - include arch/sparc/vdso/vma.o into UBSAN
  - include arch/x86/entry/vdso/extable.o into KASAN, KCSAN, UBSAN, GCOV, KCOV
  - include arch/x86/entry/vdso/vdso-image-*.o into KASAN, KCSAN, UBSAN, GCOV, KCOV
  - include arch/x86/entry/vdso/vdso32-setup.o into KASAN, KCSAN, UBSAN, GCOV, KCOV
  - include arch/x86/entry/vdso/vma.o into GCOV, KCOV
  - include arch/x86/um/vdso/vma.o into KASAN, GCOV, KCOV

I believe these are positive effects because all of them are kernel
space objects.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Tested-by: Roberto Sassu <roberto.sassu@huawei.com>

5 files changed, 0 insertions, 28 deletions

diff --git a/arch/riscv/boot/Makefile b/arch/riscv/boot/Makefile
index 8e7fc0edf21d..869c0345b908 100644
--- a/arch/riscv/boot/Makefile
+++ b/arch/riscv/boot/Makefile
@@ -14,8 +14,6 @@
 # Based on the ia64 and arm64 boot/Makefile.
 #
 
-KCOV_INSTRUMENT := n
-
 OBJCOPYFLAGS_Image :=-O binary -R .note -R .note.gnu.build-id -R .comment -S
 OBJCOPYFLAGS_loader.bin :=-O binary
 OBJCOPYFLAGS_xipImage :=-O binary -R .note -R .note.gnu.build-id -R .comment -S
diff --git a/arch/riscv/kernel/compat_vdso/Makefile b/arch/riscv/kernel/compat_vdso/Makefile
index 362208dfa7ee..24e37d1ef7ec 100644
--- a/arch/riscv/kernel/compat_vdso/Makefile
+++ b/arch/riscv/kernel/compat_vdso/Makefile
@@ -34,12 +34,6 @@ obj-compat_vdso := $(addprefix $(obj)/, $(obj-compat_vdso))
 obj-y += compat_vdso.o
 CPPFLAGS_compat_vdso.lds += -P -C -DCOMPAT_VDSO -U$(ARCH)
 
-# Disable profiling and instrumentation for VDSO code
-GCOV_PROFILE := n
-KCOV_INSTRUMENT := n
-KASAN_SANITIZE := n
-UBSAN_SANITIZE := n
-
 # Force dependency
 $(obj)/compat_vdso.o: $(obj)/compat_vdso.so
 
diff --git a/arch/riscv/kernel/pi/Makefile b/arch/riscv/kernel/pi/Makefile
index b75f150b923d..50bc5ef7dd2f 100644
--- a/arch/riscv/kernel/pi/Makefile
+++ b/arch/riscv/kernel/pi/Makefile
@@ -17,12 +17,6 @@ KBUILD_CFLAGS	+= -mcmodel=medany
 CFLAGS_cmdline_early.o += -D__NO_FORTIFY
 CFLAGS_lib-fdt_ro.o += -D__NO_FORTIFY
 
-GCOV_PROFILE	:= n
-KASAN_SANITIZE	:= n
-KCSAN_SANITIZE	:= n
-UBSAN_SANITIZE	:= n
-KCOV_INSTRUMENT	:= n
-
 $(obj)/%.pi.o: OBJCOPYFLAGS := --prefix-symbols=__pi_ \
 			       --remove-section=.note.gnu.property \
 			       --prefix-alloc-sections=.init.pi
diff --git a/arch/riscv/kernel/vdso/Makefile b/arch/riscv/kernel/vdso/Makefile
index 25f0ee629971..f7ef8ad9b550 100644
--- a/arch/riscv/kernel/vdso/Makefile
+++ b/arch/riscv/kernel/vdso/Makefile
@@ -39,12 +39,6 @@ endif
 CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS)
 CFLAGS_REMOVE_hwprobe.o = $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS)
 
-# Disable profiling and instrumentation for VDSO code
-GCOV_PROFILE := n
-KCOV_INSTRUMENT := n
-KASAN_SANITIZE := n
-UBSAN_SANITIZE := n
-
 # Force dependency
 $(obj)/vdso.o: $(obj)/vdso.so
 
diff --git a/arch/riscv/purgatory/Makefile b/arch/riscv/purgatory/Makefile
index 280b0eb352b8..f11945ee2490 100644
--- a/arch/riscv/purgatory/Makefile
+++ b/arch/riscv/purgatory/Makefile
@@ -1,5 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0
-OBJECT_FILES_NON_STANDARD := y
 
 purgatory-y := purgatory.o sha256.o entry.o string.o ctype.o memcpy.o memset.o
 purgatory-y += strcmp.o strlen.o strncmp.o
@@ -47,13 +46,6 @@ LDFLAGS_purgatory.ro := -r $(PURGATORY_LDFLAGS)
 LDFLAGS_purgatory.chk := $(PURGATORY_LDFLAGS)
 targets += purgatory.ro purgatory.chk
 
-# Sanitizer, etc. runtimes are unavailable and cannot be linked here.
-GCOV_PROFILE	:= n
-KASAN_SANITIZE	:= n
-UBSAN_SANITIZE	:= n
-KCSAN_SANITIZE	:= n
-KCOV_INSTRUMENT := n
-
 # These are adjustments to the compiler flags used for objects that
 # make up the standalone purgatory.ro