Kbuild, lto: Drop .number postfixes in modpost

LTO turns all global symbols effectively into statics. This
has the side effect that they all have a .NUMBER postfix to make
them unique. In modpost drop this postfix because it confuses
it.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1391846481-31491-8-git-send-email-ak@linux.intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

2 files changed, 15 insertions, 2 deletions

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 1f1b1549f33f..f91dd4565b81 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1684,6 +1684,19 @@ static void check_sec_ref(struct module *mod, const char *modname,
         }
 }
 
+static char *remove_dot(char *s)
+{
+        char *end;
+        int n = strcspn(s, ".");
+
+        if (n > 0 && s[n] != 0) {
+                strtoul(s + n + 1, &end, 10);
+                if  (end > s + n + 1 && (*end == '.' || *end == 0))
+                        s[n] = 0;
+        }
+        return s;
+}
+
 static void read_symbols(char *modname)
 {
         const char *symname;
@@ -1722,7 +1735,7 @@ static void read_symbols(char *modname)
         }
 
         for (sym = info.symtab_start; sym < info.symtab_stop; sym++) {
-                symname = info.strtab + sym->st_name;
+                symname = remove_dot(info.strtab + sym->st_name);
 
                 handle_modversions(mod, &info, sym, symname);
                 handle_moddevtable(mod, &info, sym, symname);
diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h
index 51207e4d5f8b..168b43dc0a59 100644
--- a/scripts/mod/modpost.h
+++ b/scripts/mod/modpost.h
@@ -127,7 +127,7 @@ struct elf_info {
         Elf_Section  export_gpl_sec;
         Elf_Section  export_unused_gpl_sec;
         Elf_Section  export_gpl_future_sec;
-        const char   *strtab;
+        char         *strtab;
         char         *modinfo;
         unsigned int modinfo_len;