Merge tag 'kbuild-fixes-v6.8-2' of git://git.kernel.org/pub/scm/linux…

…/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - Reformat nested if-conditionals in Makefiles with 4 spaces

 - Fix CONFIG_DEBUG_INFO_BTF builds for big endian

 - Fix modpost for module srcversion

 - Fix an escape sequence warning in gen_compile_commands.py

 - Fix kallsyms to ignore ARMv4 thunk symbols

* tag 'kbuild-fixes-v6.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kallsyms: ignore ARMv4 thunks along with others
  modpost: trim leading spaces when processing source files list
  gen_compile_commands: fix invalid escape sequence warning
  kbuild: Fix changing ELF file type for output of gen_btf for big endian
  docs: kconfig: Fix grammar and formatting
  kbuild: use 4-space indentation when followed by conditionals

Documentation/kbuild/Kconfig.recursion-issue-01

@@ -16,13 +16,13 @@
 # that are possible for CORE. So for example if CORE_BELL_A_ADVANCED is 'y',
 # CORE must be 'y' too.
 #
-#  * What influences CORE_BELL_A_ADVANCED ?
+#  * What influences CORE_BELL_A_ADVANCED?
 #
 # As the name implies CORE_BELL_A_ADVANCED is an advanced feature of
 # CORE_BELL_A so naturally it depends on CORE_BELL_A. So if CORE_BELL_A is 'y'
 # we know CORE_BELL_A_ADVANCED can be 'y' too.
 #
-#   * What influences CORE_BELL_A ?
+#   * What influences CORE_BELL_A?
 #
 # CORE_BELL_A depends on CORE, so CORE influences CORE_BELL_A.
 #
@@ -34,7 +34,7 @@
 # the "recursive dependency detected" error.
 #
 # Reading the Documentation/kbuild/Kconfig.recursion-issue-01 file it may be
-# obvious that an easy to solution to this problem should just be the removal
+# obvious that an easy solution to this problem should just be the removal
 # of the "select CORE" from CORE_BELL_A_ADVANCED as that is implicit already
 # since CORE_BELL_A depends on CORE. Recursive dependency issues are not always
 # so trivial to resolve, we provide another example below of practical

Makefile

@@ -294,15 +294,15 @@ may-sync-config	:= 1
 single-build	:=
 
 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
-        ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
+    ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 		need-config :=
-        endif
+    endif
 endif
 
 ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
-        ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
+    ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
 		may-sync-config :=
-        endif
+    endif
 endif
 
 need-compiler := $(may-sync-config)
@@ -323,9 +323,9 @@ endif
 # We cannot build single targets and the others at the same time
 ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
 	single-build := 1
-        ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
+    ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
 		mixed-build := 1
-        endif
+    endif
 endif
 
 # For "make -j clean all", "make -j mrproper defconfig all", etc.

arch/m68k/Makefile

@@ -15,10 +15,10 @@
 KBUILD_DEFCONFIG := multi_defconfig
 
 ifdef cross_compiling
-        ifeq ($(CROSS_COMPILE),)
+    ifeq ($(CROSS_COMPILE),)
 		CROSS_COMPILE := $(call cc-cross-prefix, \
 			m68k-linux-gnu- m68k-linux- m68k-unknown-linux-gnu-)
-        endif
+    endif
 endif
 
 #

arch/parisc/Makefile

@@ -50,12 +50,12 @@ export CROSS32CC
 
 # Set default cross compiler for kernel build
 ifdef cross_compiling
-        ifeq ($(CROSS_COMPILE),)
+    ifeq ($(CROSS_COMPILE),)
 		CC_SUFFIXES = linux linux-gnu unknown-linux-gnu suse-linux
 		CROSS_COMPILE := $(call cc-cross-prefix, \
 			$(foreach a,$(CC_ARCHES), \
 			$(foreach s,$(CC_SUFFIXES),$(a)-$(s)-)))
-        endif
+    endif
 endif
 
 ifdef CONFIG_DYNAMIC_FTRACE

arch/x86/Makefile

@@ -112,13 +112,13 @@ ifeq ($(CONFIG_X86_32),y)
         # temporary until string.h is fixed
         KBUILD_CFLAGS += -ffreestanding
 
-        ifeq ($(CONFIG_STACKPROTECTOR),y)
-                ifeq ($(CONFIG_SMP),y)
+    ifeq ($(CONFIG_STACKPROTECTOR),y)
+        ifeq ($(CONFIG_SMP),y)
 			KBUILD_CFLAGS += -mstack-protector-guard-reg=fs -mstack-protector-guard-symbol=__stack_chk_guard
-                else
+        else
 			KBUILD_CFLAGS += -mstack-protector-guard=global
-                endif
         endif
+    endif
 else
         BITS := 64
         UTS_MACHINE := x86_64

scripts/clang-tools/gen_compile_commands.py

@@ -170,7 +170,7 @@ def process_line(root_directory, command_prefix, file_path):
     # escape the pound sign '#', either as '\#' or '$(pound)' (depending on the
     # kernel version). The compile_commands.json file is not interepreted
     # by Make, so this code replaces the escaped version with '#'.
-    prefix = command_prefix.replace('\#', '#').replace('$(pound)', '#')
+    prefix = command_prefix.replace(r'\#', '#').replace('$(pound)', '#')
 
     # Return the canonical path, eliminating any symbolic links encountered in the path.
     abs_path = os.path.realpath(os.path.join(root_directory, file_path))

scripts/link-vmlinux.sh

@@ -135,8 +135,13 @@ gen_btf()
 	${OBJCOPY} --only-section=.BTF --set-section-flags .BTF=alloc,readonly \
 		--strip-all ${1} ${2} 2>/dev/null
 	# Change e_type to ET_REL so that it can be used to link final vmlinux.
-	# Unlike GNU ld, lld does not allow an ET_EXEC input.
-	printf '\1' | dd of=${2} conv=notrunc bs=1 seek=16 status=none
+	# GNU ld 2.35+ and lld do not allow an ET_EXEC input.
+	if is_enabled CONFIG_CPU_BIG_ENDIAN; then
+		et_rel='\0\1'
+	else
+		et_rel='\1\0'
+	fi
+	printf "${et_rel}" | dd of=${2} conv=notrunc bs=1 seek=16 status=none
 }
 
 # Create ${2} .S file with all symbols from the ${1} object file

scripts/mksysmap

@@ -48,17 +48,8 @@ ${NM} -n ${1} | sed >${2} -e "
 / __kvm_nvhe_\\$/d
 / __kvm_nvhe_\.L/d
 
-# arm64 lld
-/ __AArch64ADRPThunk_/d
-
-# arm lld
-/ __ARMV5PILongThunk_/d
-/ __ARMV7PILongThunk_/d
-/ __ThumbV7PILongThunk_/d
-
-# mips lld
-/ __LA25Thunk_/d
-/ __microLA25Thunk_/d
+# lld arm/aarch64/mips thunks
+/ __[[:alnum:]]*Thunk_/d
 
 # CFI type identifiers
 / __kcfi_typeid_/d

scripts/mod/sumversion.c

@@ -326,7 +326,12 @@ static int parse_source_files(const char *objfile, struct md4_ctx *md)
 
 	/* Sum all files in the same dir or subdirs. */
 	while ((line = get_line(&pos))) {
-		char* p = line;
+		char* p;
+
+		/* trim the leading spaces away */
+		while (isspace(*line))
+			line++;
+		p = line;
 
 		if (strncmp(line, "source_", sizeof("source_")-1) == 0) {
 			p = strrchr(line, ' ');