Merge tag 'objtool-urgent-2026-01-18' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull objtool fixes from Ingo Molnar:
 "Fix two objtool build failures that trigger in uncommon build
  environments"

* tag 'objtool-urgent-2026-01-18' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  objtool: fix build failure due to missing libopcodes check
  objtool: fix compilation failure with the x32 toolchain

Author: torvalds

tools/objtool/Makefile

@@ -72,23 +72,27 @@ HOST_OVERRIDES := CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)"
 
 #
 # To support disassembly, objtool needs libopcodes which is provided
-# with libbdf (binutils-dev or binutils-devel package).
+# with libbfd (binutils-dev or binutils-devel package).
 #
-FEATURE_USER = .objtool
-FEATURE_TESTS = libbfd disassembler-init-styled
-FEATURE_DISPLAY =
-include $(srctree)/tools/build/Makefile.feature
+# We check using HOSTCC directly rather than the shared feature framework
+# because objtool is a host tool that links against host libraries.
+#
+HAVE_LIBOPCODES := $(shell echo 'int main(void) { return 0; }' | \
+			$(HOSTCC) -xc - -o /dev/null -lopcodes 2>/dev/null && echo y)
 
-ifeq ($(feature-disassembler-init-styled), 1)
-	OBJTOOL_CFLAGS += -DDISASM_INIT_STYLED
-endif
+# Styled disassembler support requires binutils >= 2.39
+HAVE_DISASM_STYLED := $(shell echo '$(pound)include <dis-asm.h>' | \
+			$(HOSTCC) -E -xc - 2>/dev/null | grep -q disassembler_style && echo y)
 
 BUILD_DISAS := n
 
-ifeq ($(feature-libbfd),1)
+ifeq ($(HAVE_LIBOPCODES),y)
 	BUILD_DISAS := y
-	OBJTOOL_CFLAGS += -DDISAS -DPACKAGE="objtool"
+	OBJTOOL_CFLAGS += -DDISAS -DPACKAGE='"objtool"'
 	OBJTOOL_LDFLAGS += -lopcodes
+ifeq ($(HAVE_DISASM_STYLED),y)
+	OBJTOOL_CFLAGS += -DDISASM_INIT_STYLED
+endif
 endif
 
 export BUILD_DISAS

tools/objtool/include/objtool/warn.h

@@ -152,8 +152,8 @@ static inline void unindent(int *unused) { indent--; }
 	if (unlikely(insn->sym && insn->sym->pfunc &&			\
 		     insn->sym->pfunc->debug_checksum)) {		\
 		char *insn_off = offstr(insn->sec, insn->offset);	\
-		__dbg("checksum: %s %s %016lx",				\
-		      func->name, insn_off, checksum);			\
+		__dbg("checksum: %s %s %016llx",			\
+		      func->name, insn_off, (unsigned long long)checksum);\
 		free(insn_off);						\
 	}								\
 })