staging: lustre: obdclass: lu_site_purge() to handle purge-all

if the callers wants to purge all objects, then scanning
should start from the first bucket.

Signed-off-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-7038
Reviewed-on: http://review.whamcloud.com/18505
Reviewed-by: Mike Pershin <mike.pershin@intel.com>
Reviewed-by: Faccini Bruno <bruno.faccini@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/lustre/lustre/obdclass/lu_object.c b/drivers/staging/lustre/lustre/obdclass/lu_object.c
index 43868ed5cc3d625570f67f98d36fa5174156c056..a02aaa3a3b37c4de8d88d84384c81414f5a76820 100644 (file)
--- a/drivers/staging/lustre/lustre/obdclass/lu_object.c
+++ b/drivers/staging/lustre/lustre/obdclass/lu_object.c
@@ -338,7 +338,7 @@ int lu_site_purge(const struct lu_env *env, struct lu_site *s, int nr)
        struct cfs_hash_bd          bd2;
        struct list_head               dispose;
        int                   did_sth;
-       unsigned int start;
+       unsigned int start = 0;
        int                   count;
        int                   bnr;
        unsigned int i;
@@ -351,7 +351,8 @@ int lu_site_purge(const struct lu_env *env, struct lu_site *s, int nr)
         * Under LRU list lock, scan LRU list and move unreferenced objects to
         * the dispose list, removing them from LRU and hash table.
         */
-       start = s->ls_purge_start;
+       if (nr != ~0)
+               start = s->ls_purge_start;
        bnr = (nr == ~0) ? -1 : nr / (int)CFS_HASH_NBKT(s->ls_obj_hash) + 1;
  again:
        /*