linux-kernel - [PATCH 1/2] modpost: don't add warnings for LTO-generated symbols

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Message-Id: <20180205151300.539874-2-arnd@arndb.de>
Date:   Mon,  5 Feb 2018 16:12:52 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Andi Kleen <ak@...ux.intel.com>, Jessica Yu <jeyu@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Arnd Bergmann <arnd@...db.de>
Cc:     nico@...aro.org, linux-kernel@...r.kernel.org,
        Wanlong Gao <wanlong.gao@...il.com>,
        Luis de Bethencourt <luisbg@...nel.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>
Subject: [PATCH 1/2] modpost: don't add warnings for LTO-generated symbols

WARNING: vmlinux.o(.data+0x12e0): Section mismatch in reference from the variable pfkey_net_ops.lto_priv.2992 to the function .init.text:pfkey_net_init.lto_priv.2977()
The variable pfkey_net_ops.lto_priv.2992 references
the function __init pfkey_net_init.lto_priv.2977()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 scripts/mod/modpost.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index f75224d59294..8a8a473cee08 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1027,7 +1027,7 @@ static const struct sectioncheck sectioncheck[] = {
 	.bad_tosec = { INIT_SECTIONS, NULL },
 	.mismatch = DATA_TO_ANY_INIT,
 	.symbol_white_list = {
-		"*_template", "*_timer", "*_sht", "*_ops",
+		"*_template", "*_timer", "*_sht", "*_ops", "*_ops.lto_priv*",
 		"*_probe", "*_probe_one", "*_console", NULL
 	},
 },
-- 
2.9.0