From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E8B0824EF8C for ; Fri, 30 Jan 2026 20:39:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769805558; cv=none; b=bMKxolUftQGNPhVm4hO5raPjBsSx7Wnv4LoVpEPu8gM+0AzpCrKStlQyb7w4RfeqnQvDkrgzwbDNkueFuPTiKbNLGckbBAR+JtbVwWZKcBbph+OwRHd351T76nJ1J3KByq6ejzQVIcUjSNu/C6DCg1dAChOdHkIojnDVyKx3/vE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769805558; c=relaxed/simple; bh=Nf/1w0loMR/2i7P2iarm/D5U6PoOsOHXAnwxA1Bcq+o=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=qSeDAQhZ8U5KnoMsWj+1Nqzn6uqTwmiiYJwYfP8jSLnUsfSeV6iYeTvJaX2Qb34Qtx2ENqCcMJuoVNglQH5GP8T/nGWN9wDcJIQLG8rXfthl2aUgjVMMSkQ0xZQth+rgu/TYUWCmwq8wSPiighb7FCZb+B5XpOLr4xrjYr3udtI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=idO4R9cH; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="idO4R9cH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AF92DC4CEF7; Fri, 30 Jan 2026 20:39:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1769805557; bh=Nf/1w0loMR/2i7P2iarm/D5U6PoOsOHXAnwxA1Bcq+o=; h=From:To:Cc:Subject:Date:From; b=idO4R9cHRTmoOFAI6bPhW2v7LDXMRFKpn7sJaK+L1nK1fH/7JRLYQ80Je9UGPZPDj hykVftZQWyspim38AXLo1a6SVOIcklOdzCgtXW1EV/R0fDHvq+aVusgYyaQFGPcheO 5XVKih6uLcuqbTk1sPxhICdI7vOOq4C9W+vtLJ4FquNBniwkiI6Ikghqw0o0lRSNcE GK6k+ONT6tYzwJ4OLGe+e89Cl8hvT8mRQ4/cRpq1SIrTcMmqHshNozdTrRAc2I0YQp 0wtG3ammqz2B+CggiHNLhqOHKCrPT7YJPBPVoLaeBVHPTvHALIZvBp+yFy0E1dLzYb qiJHVcOlCA1Ew== From: Song Liu To: live-patching@vger.kernel.org Cc: jpoimboe@kernel.org, kernel-team@meta.com, jikos@kernel.org, mbenes@suse.cz, pmladek@suse.com, joe.lawrence@redhat.com, Song Liu Subject: [PATCH] klp-build: Do not warn "no correlation" for __irf_[start|end] Date: Fri, 30 Jan 2026 12:39:12 -0800 Message-ID: <20260130203912.2494181-1-song@kernel.org> X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: live-patching@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit When compiling with CONFIG_LTO_CLANG_THIN, vmlinux.o has __irf_[start|end] before the first FILE entry: $ readelf -sW vmlinux.o Symbol table '.symtab' contains 597706 entries: Num: Value Size Type Bind Vis Ndx Name 0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND 1: 0000000000000000 0 NOTYPE LOCAL DEFAULT 18 __irf_start 2: 0000000000000200 0 NOTYPE LOCAL DEFAULT 18 __irf_end 3: 0000000000000000 0 SECTION LOCAL DEFAULT 17 .text 4: 0000000000000000 0 SECTION LOCAL DEFAULT 18 .init.ramfs This causes klp-build throwing warnings like: vmlinux.o: warning: objtool: no correlation: __irf_start vmlinux.o: warning: objtool: no correlation: __irf_end Fix this by not warn for no correlation before seeing the first FILE entry. Signed-off-by: Song Liu --- tools/objtool/klp-diff.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/tools/objtool/klp-diff.c b/tools/objtool/klp-diff.c index d94531e3f64e..370e5c79ae66 100644 --- a/tools/objtool/klp-diff.c +++ b/tools/objtool/klp-diff.c @@ -363,6 +363,7 @@ static int correlate_symbols(struct elfs *e) { struct symbol *file1_sym, *file2_sym; struct symbol *sym1, *sym2; + bool found_first_file = false; /* Correlate locals */ for (file1_sym = first_file_symbol(e->orig), @@ -432,9 +433,12 @@ static int correlate_symbols(struct elfs *e) } for_each_sym(e->orig, sym1) { + if (!found_first_file && is_file_sym(sym1)) + found_first_file = true; if (sym1->twin || dont_correlate(sym1)) continue; - WARN("no correlation: %s", sym1->name); + if (found_first_file) + WARN("no correlation: %s", sym1->name); } return 0; -- 2.47.3