On systems where vmlinux file is not under /usr/lib/debug/lib/modules
directory, 'mod -s|-S' command may fail to find the module's object
file with the below error:

    mod: cannot find or load object file for sd_mod module

Fix it by trying all possible module object file extentions while
searching for the object file under /usr/lib/debug/lib/modules
directory.

Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.ibm.com>
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
---
 kernel.c |   13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/kernel.c b/kernel.c
index 36fdea2..b2c8a0c 100644
--- a/kernel.c
+++ b/kernel.c
@@ -4796,7 +4796,18 @@ module_objfile_search(char *modref, char *filename, char *tree)

        sprintf(dir, "%s/%s", DEFAULT_REDHAT_DEBUG_LOCATION,
                kt->utsname.release);
-       retbuf = search_directory_tree(dir, file, 0);
+       if (!(retbuf = search_directory_tree(dir, file, 0))) {
+               switch (kt->flags & (KMOD_V1|KMOD_V2))
+               {
+               case KMOD_V2:
+                       sprintf(file, "%s.ko", modref);
+                       retbuf = search_directory_tree(dir, file, 0);
+                       if (!retbuf) {
+                               sprintf(file, "%s.ko.debug", modref);
+                               retbuf = search_directory_tree(dir, file, 0);
+                       }
+               }
+       }

        if (!retbuf && (env = getenv("CRASH_MODULE_PATH"))) {
                sprintf(dir, "%s", env);