1 files changed, 8 insertions, 63 deletions

diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h
index b5dff1fff1e5..10a2921baf14 100644
--- a/fs/ext4/mballoc.h
+++ b/fs/ext4/mballoc.h
@@ -20,6 +20,7 @@
 #include <linux/version.h>
 #include <linux/blkdev.h>
 #include <linux/marker.h>
+#include <linux/mutex.h>
 #include "ext4_jbd2.h"
 #include "ext4.h"
 #include "group.h"
@@ -98,9 +99,6 @@
  */
 #define MB_DEFAULT_GROUP_PREALLOC       512
 
-static struct kmem_cache *ext4_pspace_cachep;
-static struct kmem_cache *ext4_ac_cachep;
-static struct kmem_cache *ext4_free_ext_cachep;
 
 struct ext4_free_data {
         /* this links the free block information from group_info */
@@ -120,26 +118,6 @@ struct ext4_free_data {
         tid_t   t_tid;
 };
 
-struct ext4_group_info {
-        unsigned long   bb_state;
-        struct rb_root  bb_free_root;
-        unsigned short  bb_first_free;
-        unsigned short  bb_free;
-        unsigned short  bb_fragments;
-        struct          list_head bb_prealloc_list;
-#ifdef DOUBLE_CHECK
-        void            *bb_bitmap;
-#endif
-        unsigned short  bb_counters[];
-};
-
-#define EXT4_GROUP_INFO_NEED_INIT_BIT   0
-#define EXT4_GROUP_INFO_LOCKED_BIT      1
-
-#define EXT4_MB_GRP_NEED_INIT(grp)      \
-        (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state)))
-
-
 struct ext4_prealloc_space {
         struct list_head        pa_inode_list;
         struct list_head        pa_group_list;
@@ -217,6 +195,11 @@ struct ext4_allocation_context {
         __u8 ac_op;             /* operation, for history only */
         struct page *ac_bitmap_page;
         struct page *ac_buddy_page;
+        /*
+         * pointer to the held semaphore upon successful
+         * block allocation
+         */
+        struct rw_semaphore *alloc_semp;
         struct ext4_prealloc_space *ac_pa;
         struct ext4_locality_group *ac_lg;
 };
@@ -250,6 +233,7 @@ struct ext4_buddy {
         struct super_block *bd_sb;
         __u16 bd_blkbits;
         ext4_group_t bd_group;
+        struct rw_semaphore *alloc_semp;
 };
 #define EXT4_MB_BITMAP(e4b)     ((e4b)->bd_bitmap)
 #define EXT4_MB_BUDDY(e4b)      ((e4b)->bd_buddy)
@@ -259,51 +243,12 @@ static inline void ext4_mb_store_history(struct ext4_allocation_context *ac)
 {
         return;
 }
-#else
-static void ext4_mb_store_history(struct ext4_allocation_context *ac);
 #endif
 
 #define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1)
 
 struct buffer_head *read_block_bitmap(struct super_block *, ext4_group_t);
-
-static void ext4_mb_generate_from_pa(struct super_block *sb, void *bitmap,
-                                        ext4_group_t group);
-static void ext4_mb_return_to_preallocation(struct inode *inode,
-                                        struct ext4_buddy *e4b, sector_t block,
-                                        int count);
-static void ext4_mb_put_pa(struct ext4_allocation_context *,
-                        struct super_block *, struct ext4_prealloc_space *pa);
-static int ext4_mb_init_per_dev_proc(struct super_block *sb);
-static int ext4_mb_destroy_per_dev_proc(struct super_block *sb);
-static void release_blocks_on_commit(journal_t *journal, transaction_t *txn);
-
-
-static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group)
-{
-        struct ext4_group_info *grinfo = ext4_get_group_info(sb, group);
-
-        bit_spin_lock(EXT4_GROUP_INFO_LOCKED_BIT, &(grinfo->bb_state));
-}
-
-static inline void ext4_unlock_group(struct super_block *sb,
-                                        ext4_group_t group)
-{
-        struct ext4_group_info *grinfo = ext4_get_group_info(sb, group);
-
-        bit_spin_unlock(EXT4_GROUP_INFO_LOCKED_BIT, &(grinfo->bb_state));
-}
-
-static inline int ext4_is_group_locked(struct super_block *sb,
-                                        ext4_group_t group)
-{
-        struct ext4_group_info *grinfo = ext4_get_group_info(sb, group);
-
-        return bit_spin_is_locked(EXT4_GROUP_INFO_LOCKED_BIT,
-                                                &(grinfo->bb_state));
-}
-
-static ext4_fsblk_t ext4_grp_offs_to_block(struct super_block *sb,
+static inline ext4_fsblk_t ext4_grp_offs_to_block(struct super_block *sb,
                                         struct ext4_free_extent *fex)
 {
         ext4_fsblk_t block;