linux-kernel - [tip: objtool/core] objtool: Set minimum xxhash version to 0.8

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Message-ID: <176345724939.498.14683474063482790069.tip-bot2@tip-bot2>
Date: Tue, 18 Nov 2025 09:14:09 -0000
From: "tip-bot2 for Josh Poimboeuf" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Michael Kelley <mhklinux@...look.com>,
 Josh Poimboeuf <jpoimboe@...nel.org>,
 "Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: objtool/core] objtool: Set minimum xxhash version to 0.8

The following commit has been merged into the objtool/core branch of tip:

Commit-ID:     ee0b48fabadf9b073b24f761ac09da7293eee7b7
Gitweb:        https://git.kernel.org/tip/ee0b48fabadf9b073b24f761ac09da7293eee7b7
Author:        Josh Poimboeuf <jpoimboe@...nel.org>
AuthorDate:    Wed, 12 Nov 2025 15:32:33 -08:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Tue, 18 Nov 2025 09:59:25 +01:00

objtool: Set minimum xxhash version to 0.8

XXH3 is only supported starting with xxhash 0.8.  Enforce that.

Fixes: 0d83da43b1e1 ("objtool/klp: Add --checksum option to generate per-function checksums")
Closes: https://lore.kernel.org/SN6PR02MB41579B83CD295C9FEE40EED6D4FCA@SN6PR02MB4157.namprd02.prod.outlook.com
Reported-by: Michael Kelley <mhklinux@...look.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Michael Kelley <mhklinux@...look.com>
Tested-by: Michael Kelley <mhklinux@...look.com>
Link: https://patch.msgid.link/7227c94692a3a51840278744c7af31b4797c6b96.1762990139.git.jpoimboe@kernel.org
---
 tools/objtool/Makefile        | 2 +-
 tools/objtool/builtin-check.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile
index 48928c9..021f55b 100644
--- a/tools/objtool/Makefile
+++ b/tools/objtool/Makefile
@@ -12,7 +12,7 @@ ifeq ($(SRCARCH),loongarch)
 endif
 
 ifeq ($(ARCH_HAS_KLP),y)
-	HAVE_XXHASH = $(shell echo "int main() {}" | \
+	HAVE_XXHASH = $(shell printf "$(pound)include <xxhash.h>\nXXH3_state_t *state;int main() {}" | \
 		      $(HOSTCC) -xc - -o /dev/null -lxxhash 2> /dev/null && echo y || echo n)
 	ifeq ($(HAVE_XXHASH),y)
 		BUILD_KLP	 := y
diff --git a/tools/objtool/builtin-check.c b/tools/objtool/builtin-check.c
index 1e1ea83..aab7fa9 100644
--- a/tools/objtool/builtin-check.c
+++ b/tools/objtool/builtin-check.c
@@ -164,7 +164,7 @@ static bool opts_valid(void)
 
 #ifndef BUILD_KLP
 	if (opts.checksum) {
-		ERROR("--checksum not supported; install xxhash-devel/libxxhash-dev and recompile");
+		ERROR("--checksum not supported; install xxhash-devel/libxxhash-dev (version >= 0.8) and recompile");
 		return false;
 	}
 #endif