LU-6972 llite: get rid of unused ll_super_blocks list

ll_super_blocks became unused quite a while ago with switch
to the new CLIO code.
So this patch removes the list, ll_sb_lock spinlock that guards it
and superblock info ll_list linkage.

Change-Id: If0af4f4c05f45feaedc54ca57f0d1106ad7cabe3
Signed-off-by: Oleg Drokin <oleg.drokin@intel.com>
Reviewed-on: http://review.whamcloud.com/15922
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>

diff --git a/lustre/llite/llite_internal.h b/lustre/llite/llite_internal.h
index c37c102..8d6dfb8 100644 (file)
--- a/lustre/llite/llite_internal.h
+++ b/lustre/llite/llite_internal.h
@@ -509,7 +509,6 @@ struct lustre_client_ocd {
 };
 
 struct ll_sb_info {
-       struct list_head                  ll_list;
        /* this protects pglist and ra_info.  It isn't safe to
         * grab from interrupt contexts */
        spinlock_t                ll_lock;

diff --git a/lustre/llite/llite_lib.c b/lustre/llite/llite_lib.c
index 775fe80..dd8c8d8 100644 (file)
--- a/lustre/llite/llite_lib.c
+++ b/lustre/llite/llite_lib.c
@@ -63,9 +63,6 @@
 
 struct kmem_cache *ll_file_data_slab;
 
-static struct list_head ll_super_blocks = LIST_HEAD_INIT(ll_super_blocks);
-static DEFINE_SPINLOCK(ll_sb_lock);
-
 #ifndef log2
 #define log2(n) ffz(~(n))
 #endif
@@ -113,10 +110,6 @@ static struct ll_sb_info *ll_init_sbi(void)
         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 
-       spin_lock(&ll_sb_lock);
-       list_add_tail(&sbi->ll_list, &ll_super_blocks);
-       spin_unlock(&ll_sb_lock);
-
         sbi->ll_flags |= LL_SBI_VERBOSE;
 #ifdef ENABLE_CHECKSUM
         sbi->ll_flags |= LL_SBI_CHECKSUM;
@@ -156,9 +149,6 @@ static void ll_free_sbi(struct super_block *sb)
        ENTRY;
 
        if (sbi != NULL) {
-               spin_lock(&ll_sb_lock);
-               list_del(&sbi->ll_list);
-               spin_unlock(&ll_sb_lock);
                if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
                        cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
                if (sbi->ll_cache != NULL) {