[tip:x86/asmlinkage] Kbuild, lto: Handle basic LTO in modpost
From: tip-bot for Andi Kleen
Date: Thu Feb 13 2014 - 23:32:37 EST
Commit-ID: ef178f9238b142cc1020265e176b20d27fd02ba9
Gitweb: http://git.kernel.org/tip/ef178f9238b142cc1020265e176b20d27fd02ba9
Author: Andi Kleen <ak@xxxxxxxxxxxxxxx>
AuthorDate: Sat, 8 Feb 2014 09:01:17 +0100
Committer: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
CommitDate: Thu, 13 Feb 2014 20:25:05 -0800
Kbuild, lto: Handle basic LTO in modpost
- Don't warn about LTO marker symbols. modpost runs before
the linker, so the module is not necessarily LTOed yet.
- Don't complain about .gnu.lto* sections
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1391846481-31491-13-git-send-email-ak@xxxxxxxxxxxxxxx
Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
---
scripts/mod/modpost.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index f91dd45..63804a1 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -623,7 +623,10 @@ 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)) {
+ /* Should warn here, but modpost runs before the linker */
+ } else
+ warn("\"%s\" [%s] is COMMON symbol\n", symname, mod->name);
break;
case SHN_UNDEF:
/* undefined symbol */
@@ -849,6 +852,7 @@ static const char *section_white_list[] =
".xt.lit", /* xtensa */
".arcextmap*", /* arc */
".gnu.linkonce.arcext*", /* arc : modules */
+ ".gnu.lto*",
NULL
};
--
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