kbuild: Fix computing srcversion for modules

Recent change to fixdep:

    commit b7bd182176960fdd139486cadb9962b39f8a2b50
    Author: Michal Marek <mmarek@suse.cz>
    Date:   Thu Feb 17 15:13:54 2011 +0100

    fixdep: Do not record dependency on the source file itself

changed the format of the *.cmd files without realizing that it is also
used by modpost. Put the path to the source file to the file back, in a
special variable, so that modpost sees all source files when calculating
srcversion for modules.

Reported-and-tested-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 17 insertions, 2 deletions

diff --git a/scripts/mod/sumversion.c b/scripts/mod/sumversion.c
index ecf9c7dc1825..9dfcd6d988da 100644
--- a/scripts/mod/sumversion.c
+++ b/scripts/mod/sumversion.c
@@ -300,8 +300,8 @@ static int is_static_library(const char *objfile)
                 return 0;
 }
 
-/* We have dir/file.o.  Open dir/.file.o.cmd, look for deps_ line to
- * figure out source file. */
+/* We have dir/file.o.  Open dir/.file.o.cmd, look for source_ and deps_ line
+ * to figure out source files. */
 static int parse_source_files(const char *objfile, struct md4_ctx *md)
 {
         char *cmd, *file, *line, *dir;
@@ -340,6 +340,21 @@ static int parse_source_files(const char *objfile, struct md4_ctx *md)
         */
         while ((line = get_next_line(&pos, file, flen)) != NULL) {
                 char* p = line;
+
+                if (strncmp(line, "source_", sizeof("source_")-1) == 0) {
+                        p = strrchr(line, ' ');
+                        if (!p) {
+                                warn("malformed line: %s\n", line);
+                                goto out_file;
+                        }
+                        p++;
+                        if (!parse_file(p, md)) {
+                                warn("could not open %s: %s\n",
+                                     p, strerror(errno));
+                                goto out_file;
+                        }
+                        continue;
+                }
                 if (strncmp(line, "deps_", sizeof("deps_")-1) == 0) {
                         check_files = 1;
                         continue;