linux-kernel - [PATCH 66/74] Kbuild, lto: Handle basic LTO in modpost

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Message-Id: <1345345030-22211-67-git-send-email-andi@firstfloor.org>
Date:	Sat, 18 Aug 2012 19:57:02 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	linux-kernel@...r.kernel.org
Cc:	x86@...nel.org, mmarek@...e.cz, linux-kbuild@...r.kernel.org,
	JBeulich@...e.com, akpm@...ux-foundation.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH 66/74] Kbuild, lto: Handle basic LTO in modpost

From: Andi Kleen <ak@...ux.intel.com>

- Don't warn for __gnu_lto_* COMMON symbols
- Don't complain about .gnu.lto* sections

Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
 scripts/mod/modpost.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index ccd34ff..11fc5a6 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -600,7 +600,8 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
 
 	switch (sym->st_shndx) {
 	case SHN_COMMON:
-		warn("\"%s\" [%s] is COMMON symbol\n", symname, mod->name);
+		if (strncmp(symname, "__gnu_lto_", sizeof("__gnu_lto_")-1))
+			warn("\"%s\" [%s] is COMMON symbol\n", symname, mod->name);
 		break;
 	case SHN_ABS:
 		/* CRC'd symbol */
@@ -827,6 +828,7 @@ static const char *section_white_list[] =
 	".note*",
 	".got*",
 	".toc*",
+	".gnu.lto*",
 	NULL
 };
 
-- 
1.7.7.6

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