From: Andi Kleen Date: Sat, 8 Feb 2014 08:01:17 +0000 (+0100) Subject: Kbuild, lto: Handle basic LTO in modpost X-Git-Tag: Ubuntu-5.4-5.4.0-11.14~14762^2 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=ef178f9238b142cc1020265e176b20d27fd02ba9;p=mirror_ubuntu-focal-kernel.git 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 Link: http://lkml.kernel.org/r/1391846481-31491-13-git-send-email-ak@linux.intel.com Signed-off-by: H. Peter Anvin --- diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index f91dd4565b81..63804a16ba9f 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 };