[tip:x86/asmlinkage] Kbuild, lto, workaround: Don' t warn for initcall_reference in modpost

From: tip-bot for Andi Kleen
Date: Thu Feb 13 2014 - 23:31:42 EST


Commit-ID: 77ab21adae509c5540956729e2d03bc1a59bc82a
Gitweb: http://git.kernel.org/tip/77ab21adae509c5540956729e2d03bc1a59bc82a
Author: Andi Kleen <ak@xxxxxxxxxxxxxxx>
AuthorDate: Sat, 8 Feb 2014 09:01:11 +0100
Committer: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
CommitDate: Thu, 13 Feb 2014 20:24:56 -0800

Kbuild, lto, workaround: Don't warn for initcall_reference in modpost

This reference is discarded, but can cause warnings when it refers to
exit. Ignore for now.

This is a workaround and can be removed once we get rid of
-fno-toplevel-reorder

Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1391846481-31491-7-git-send-email-ak@xxxxxxxxxxxxxxx
Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
---
scripts/mod/modpost.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 4061098..1f1b154 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1455,6 +1455,10 @@ static void check_section_mismatch(const char *modname, struct elf_info *elf,
to = find_elf_symbol(elf, r->r_addend, sym);
tosym = sym_name(elf, to);

+ if (!strncmp(fromsym, "reference___initcall",
+ sizeof("reference___initcall")-1))
+ return;
+
/* check whitelist - we may ignore it */
if (secref_whitelist(mismatch,
fromsec, fromsym, tosec, tosym)) {
--
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