linux-kernel - [PATCH] objtool: fix failure when being compiled on x32 system

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Message-ID: <1ac32fff-2e67-5155-f570-69aad5bf5412@redhat.com>
Date: Mon, 20 Oct 2025 14:23:58 +0200 (CEST)
From: Mikulas Patocka <mpatocka@...hat.com>
To: Ard Biesheuvel <ardb@...nel.org>
cc: Borislav Petkov <bp@...en8.de>, Peter Zijlstra <peterz@...radead.org>, 
    Josh Poimboeuf <jpoimboe@...nel.org>, 
    Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH] objtool: fix failure when being compiled on x32 system

Fix compilation failure when compiling the kernel with the x32 toolchain.

In file included from check.c:16:
check.c: In function ‘check_abs_references’:
/usr/src/git/linux-2.6/tools/objtool/include/objtool/warn.h:47:17: error: format ‘%lx’ expects argument of type ‘long unsigned int’, but argument 7 has type ‘u64’ {aka ‘long
long unsigned int’} [-Werror=format=]
   47 |                 "%s%s%s: objtool" extra ": " format "\n",               \
      |                 ^~~~~~~~~~~~~~~~~
/usr/src/git/linux-2.6/tools/objtool/include/objtool/warn.h:54:9: note: in expansion of macro ‘___WARN’
   54 |         ___WARN(severity, "", format, ##__VA_ARGS__)
      |         ^~~~~~~
/usr/src/git/linux-2.6/tools/objtool/include/objtool/warn.h:74:27: note: in expansion of macro ‘__WARN’
   74 | #define WARN(format, ...) __WARN(WARN_STR, format, ##__VA_ARGS__)
      |                           ^~~~~~
check.c:4713:33: note: in expansion of macro ‘WARN’
 4713 |                                 WARN("section %s has absolute relocation at offset 0x%lx",
      |                                 ^~~~

Signed-off-by: Mikulas Patocka <mpatocka@...hat.com>
Fixes: 0d6e4563fc03 ("objtool: Add action to check for absence of absolute relocations")

---
 tools/objtool/check.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: linux-2.6/tools/objtool/check.c
===================================================================
--- linux-2.6.orig/tools/objtool/check.c	2025-10-13 21:42:48.000000000 +0200
+++ linux-2.6/tools/objtool/check.c	2025-10-13 21:48:33.000000000 +0200
@@ -4710,8 +4710,8 @@ static int check_abs_references(struct o
 
 		for_each_reloc(sec->rsec, reloc) {
 			if (arch_absolute_reloc(file->elf, reloc)) {
-				WARN("section %s has absolute relocation at offset 0x%lx",
-				     sec->name, reloc_offset(reloc));
+				WARN("section %s has absolute relocation at offset 0x%llx",
+				     sec->name, (unsigned long long)reloc_offset(reloc));
 				ret++;
 			}
 		}