[PATCH] hpfs cleanup (switch from sleep_on() to semaphore)

	Pair (flag, wait_queue) in hpfs replaced with semaphore.

fs/hpfs/buffer.c

@@ -14,8 +14,7 @@ void hpfs_lock_creation(struct super_block *s)
 #ifdef DEBUG_LOCKS
 	printk("lock creation\n");
 #endif
-	while (s->s_hpfs_creation_de_lock) sleep_on(&s->s_hpfs_creation_de);
-	s->s_hpfs_creation_de_lock = 1;
+	down(&s->u.hpfs_sb.hpfs_creation_de);
 }
 
 void hpfs_unlock_creation(struct super_block *s)
@@ -23,8 +22,7 @@ void hpfs_unlock_creation(struct super_block *s)
 #ifdef DEBUG_LOCKS
 	printk("unlock creation\n");
 #endif
-	s->s_hpfs_creation_de_lock = 0;
-	wake_up(&s->s_hpfs_creation_de);
+	up(&s->u.hpfs_sb.hpfs_creation_de);
 }
 
 void hpfs_lock_iget(struct super_block *s, int mode)

fs/hpfs/super.c

@@ -427,8 +427,8 @@ struct super_block *hpfs_read_super(struct super_block *s, void *options,
 	s->s_hpfs_bmp_dir = NULL;
 	s->s_hpfs_cp_table = NULL;
 
-	s->s_hpfs_creation_de_lock = s->s_hpfs_rd_inode = 0;
-	init_waitqueue_head(&s->s_hpfs_creation_de);
+	s->s_hpfs_rd_inode = 0;
+	init_MUTEX(&s->u.hpfs_sb.hpfs_creation_de);
 	init_waitqueue_head(&s->s_hpfs_iget_q);
 
 	uid = current->uid;

include/linux/hpfs_fs_sb.h

@@ -30,9 +30,8 @@ struct hpfs_sb_info {
 					/*	128 bytes lowercasing table */
 	unsigned *sb_bmp_dir;		/* main bitmap directory */
 	unsigned sb_c_bitmap;		/* current bitmap */
-	wait_queue_head_t sb_creation_de;/* when creating dirents, nobody else
+	struct semaphore hpfs_creation_de; /* when creating dirents, nobody else
 					   can alloc blocks */
-	unsigned sb_creation_de_lock : 1;
 	/*unsigned sb_mounting : 1;*/
 	int sb_timeshift;
 };
@@ -60,8 +59,6 @@ struct hpfs_sb_info {
 #define s_hpfs_cp_table u.hpfs_sb.sb_cp_table
 #define s_hpfs_bmp_dir u.hpfs_sb.sb_bmp_dir
 #define s_hpfs_c_bitmap u.hpfs_sb.sb_c_bitmap
-#define s_hpfs_creation_de u.hpfs_sb.sb_creation_de
-#define s_hpfs_creation_de_lock u.hpfs_sb.sb_creation_de_lock
 #define s_hpfs_iget_q u.hpfs_sb.sb_iget_q
 /*#define s_hpfs_mounting u.hpfs_sb.sb_mounting*/
 #define s_hpfs_timeshift u.hpfs_sb.sb_timeshift