1 files changed, 23 insertions, 24 deletions

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index b2fa4b615925..f75d197d5beb 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -206,14 +206,14 @@ int need_dentry_mark(struct f2fs_sb_info *sbi, nid_t nid)
         struct nat_entry *e;
         bool need = false;
 
-        percpu_down_read(&nm_i->nat_tree_lock);
+        down_read(&nm_i->nat_tree_lock);
         e = __lookup_nat_cache(nm_i, nid);
         if (e) {
                 if (!get_nat_flag(e, IS_CHECKPOINTED) &&
                                 !get_nat_flag(e, HAS_FSYNCED_INODE))
                         need = true;
         }
-        percpu_up_read(&nm_i->nat_tree_lock);
+        up_read(&nm_i->nat_tree_lock);
         return need;
 }
 
@@ -223,11 +223,11 @@ bool is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid)
         struct nat_entry *e;
         bool is_cp = true;
 
-        percpu_down_read(&nm_i->nat_tree_lock);
+        down_read(&nm_i->nat_tree_lock);
         e = __lookup_nat_cache(nm_i, nid);
         if (e && !get_nat_flag(e, IS_CHECKPOINTED))
                 is_cp = false;
-        percpu_up_read(&nm_i->nat_tree_lock);
+        up_read(&nm_i->nat_tree_lock);
         return is_cp;
 }
 
@@ -237,13 +237,13 @@ bool need_inode_block_update(struct f2fs_sb_info *sbi, nid_t ino)
         struct nat_entry *e;
         bool need_update = true;
 
-        percpu_down_read(&nm_i->nat_tree_lock);
+        down_read(&nm_i->nat_tree_lock);
         e = __lookup_nat_cache(nm_i, ino);
         if (e && get_nat_flag(e, HAS_LAST_FSYNC) &&
                         (get_nat_flag(e, IS_CHECKPOINTED) ||
                          get_nat_flag(e, HAS_FSYNCED_INODE)))
                 need_update = false;
-        percpu_up_read(&nm_i->nat_tree_lock);
+        up_read(&nm_i->nat_tree_lock);
         return need_update;
 }
 
@@ -284,7 +284,7 @@ static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni,
         struct f2fs_nm_info *nm_i = NM_I(sbi);
         struct nat_entry *e;
 
-        percpu_down_write(&nm_i->nat_tree_lock);
+        down_write(&nm_i->nat_tree_lock);
         e = __lookup_nat_cache(nm_i, ni->nid);
         if (!e) {
                 e = grab_nat_entry(nm_i, ni->nid);
@@ -334,7 +334,7 @@ static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni,
                         set_nat_flag(e, HAS_FSYNCED_INODE, true);
                 set_nat_flag(e, HAS_LAST_FSYNC, fsync_done);
         }
-        percpu_up_write(&nm_i->nat_tree_lock);
+        up_write(&nm_i->nat_tree_lock);
 }
 
 int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink)
@@ -342,7 +342,8 @@ int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink)
         struct f2fs_nm_info *nm_i = NM_I(sbi);
         int nr = nr_shrink;
 
-        percpu_down_write(&nm_i->nat_tree_lock);
+        if (!down_write_trylock(&nm_i->nat_tree_lock))
+                return 0;
 
         while (nr_shrink && !list_empty(&nm_i->nat_entries)) {
                 struct nat_entry *ne;
@@ -351,7 +352,7 @@ int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink)
                 __del_from_nat_cache(nm_i, ne);
                 nr_shrink--;
         }
-        percpu_up_write(&nm_i->nat_tree_lock);
+        up_write(&nm_i->nat_tree_lock);
         return nr - nr_shrink;
 }
 
@@ -373,13 +374,13 @@ void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni)
         ni->nid = nid;
 
         /* Check nat cache */
-        percpu_down_read(&nm_i->nat_tree_lock);
+        down_read(&nm_i->nat_tree_lock);
         e = __lookup_nat_cache(nm_i, nid);
         if (e) {
                 ni->ino = nat_get_ino(e);
                 ni->blk_addr = nat_get_blkaddr(e);
                 ni->version = nat_get_version(e);
-                percpu_up_read(&nm_i->nat_tree_lock);
+                up_read(&nm_i->nat_tree_lock);
                 return;
         }
 
@@ -403,11 +404,11 @@ void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni)
         node_info_from_raw_nat(ni, &ne);
         f2fs_put_page(page, 1);
 cache:
-        percpu_up_read(&nm_i->nat_tree_lock);
+        up_read(&nm_i->nat_tree_lock);
         /* cache nat entry */
-        percpu_down_write(&nm_i->nat_tree_lock);
+        down_write(&nm_i->nat_tree_lock);
         cache_nat_entry(sbi, nid, &ne);
-        percpu_up_write(&nm_i->nat_tree_lock);
+        up_write(&nm_i->nat_tree_lock);
 }
 
 /*
@@ -1788,7 +1789,7 @@ void build_free_nids(struct f2fs_sb_info *sbi)
         ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), FREE_NID_PAGES,
                                                         META_NAT, true);
 
-        percpu_down_read(&nm_i->nat_tree_lock);
+        down_read(&nm_i->nat_tree_lock);
 
         while (1) {
                 struct page *page = get_current_nat_page(sbi, nid);
@@ -1820,7 +1821,7 @@ void build_free_nids(struct f2fs_sb_info *sbi)
                         remove_free_nid(nm_i, nid);
         }
         up_read(&curseg->journal_rwsem);
-        percpu_up_read(&nm_i->nat_tree_lock);
+        up_read(&nm_i->nat_tree_lock);
 
         ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nm_i->next_scan_nid),
                                         nm_i->ra_nid_pages, META_NAT, false);
@@ -2209,7 +2210,7 @@ void flush_nat_entries(struct f2fs_sb_info *sbi)
         if (!nm_i->dirty_nat_cnt)
                 return;
 
-        percpu_down_write(&nm_i->nat_tree_lock);
+        down_write(&nm_i->nat_tree_lock);
 
         /*
          * if there are no enough space in journal to store dirty nat
@@ -2232,7 +2233,7 @@ void flush_nat_entries(struct f2fs_sb_info *sbi)
         list_for_each_entry_safe(set, tmp, &sets, set_list)
                 __flush_nat_entry_set(sbi, set);
 
-        percpu_up_write(&nm_i->nat_tree_lock);
+        up_write(&nm_i->nat_tree_lock);
 
         f2fs_bug_on(sbi, nm_i->dirty_nat_cnt);
 }
@@ -2268,8 +2269,7 @@ static int init_node_manager(struct f2fs_sb_info *sbi)
 
         mutex_init(&nm_i->build_lock);
         spin_lock_init(&nm_i->free_nid_list_lock);
-        if (percpu_init_rwsem(&nm_i->nat_tree_lock))
-                return -ENOMEM;
+        init_rwsem(&nm_i->nat_tree_lock);
 
         nm_i->next_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid);
         nm_i->bitmap_size = __bitmap_size(sbi, NAT_BITMAP);
@@ -2326,7 +2326,7 @@ void destroy_node_manager(struct f2fs_sb_info *sbi)
         spin_unlock(&nm_i->free_nid_list_lock);
 
         /* destroy nat cache */
-        percpu_down_write(&nm_i->nat_tree_lock);
+        down_write(&nm_i->nat_tree_lock);
         while ((found = __gang_lookup_nat_cache(nm_i,
                                         nid, NATVEC_SIZE, natvec))) {
                 unsigned idx;
@@ -2351,9 +2351,8 @@ void destroy_node_manager(struct f2fs_sb_info *sbi)
                         kmem_cache_free(nat_entry_set_slab, setvec[idx]);
                 }
         }
-        percpu_up_write(&nm_i->nat_tree_lock);
+        up_write(&nm_i->nat_tree_lock);
 
-        percpu_free_rwsem(&nm_i->nat_tree_lock);
         kfree(nm_i->nat_bitmap);
         sbi->nm_info = NULL;
         kfree(nm_i);