fat: convert to new aops

[linux-2.6-omap-h63xx.git] / fs / fat / fatent.c

diff --git a/fs/fat/fatent.c b/fs/fat/fatent.c
index 4164cd54c4d1e6b3308ea2c7869a87f517022388..2c1b73fb82ae29f5a135342c75c2d73fe0d5d931 100644 (file)
--- a/fs/fat/fatent.c
+++ b/fs/fat/fatent.c
@@ -17,6 +17,8 @@ struct fatent_operations {
        int (*ent_next)(struct fat_entry *);
 };
 
+static DEFINE_SPINLOCK(fat12_entry_lock);
+
 static void fat12_ent_blocknr(struct super_block *sb, int entry,
                              int *offset, sector_t *blocknr)
 {
@@ -116,10 +118,13 @@ static int fat12_ent_get(struct fat_entry *fatent)
        u8 **ent12_p = fatent->u.ent12_p;
        int next;
 
+       spin_lock(&fat12_entry_lock);
        if (fatent->entry & 1)
                next = (*ent12_p[0] >> 4) | (*ent12_p[1] << 4);
        else
                next = (*ent12_p[1] << 8) | *ent12_p[0];
+       spin_unlock(&fat12_entry_lock);
+
        next &= 0x0fff;
        if (next >= BAD_FAT12)
                next = FAT_ENT_EOF;
@@ -151,6 +156,7 @@ static void fat12_ent_put(struct fat_entry *fatent, int new)
        if (new == FAT_ENT_EOF)
                new = EOF_FAT12;
 
+       spin_lock(&fat12_entry_lock);
        if (fatent->entry & 1) {
                *ent12_p[0] = (new << 4) | (*ent12_p[0] & 0x0f);
                *ent12_p[1] = new >> 4;
@@ -158,6 +164,7 @@ static void fat12_ent_put(struct fat_entry *fatent, int new)
                *ent12_p[0] = new & 0xff;
                *ent12_p[1] = (*ent12_p[1] & 0xf0) | (new >> 8);
        }
+       spin_unlock(&fat12_entry_lock);
 
        mark_buffer_dirty(fatent->bhs[0]);
        if (fatent->nr_bhs == 2)
@@ -267,19 +274,19 @@ static struct fatent_operations fat32_ops = {
 
 static inline void lock_fat(struct msdos_sb_info *sbi)
 {
-       down(&sbi->fat_lock);
+       mutex_lock(&sbi->fat_lock);
 }
 
 static inline void unlock_fat(struct msdos_sb_info *sbi)
 {
-       up(&sbi->fat_lock);
+       mutex_unlock(&sbi->fat_lock);
 }
 
 void fat_ent_access_init(struct super_block *sb)
 {
        struct msdos_sb_info *sbi = MSDOS_SB(sb);
 
-       init_MUTEX(&sbi->fat_lock);
+       mutex_init(&sbi->fat_lock);
 
        switch (sbi->fat_bits) {
        case 32:
@@ -476,6 +483,7 @@ int fat_alloc_clusters(struct inode *inode, int *cluster, int nr_cluster)
                                sbi->prev_free = entry;
                                if (sbi->free_clusters != -1)
                                        sbi->free_clusters--;
+                               sb->s_dirt = 1;
 
                                cluster[idx_clus] = entry;
                                idx_clus++;
@@ -496,6 +504,7 @@ int fat_alloc_clusters(struct inode *inode, int *cluster, int nr_cluster)
 
        /* Couldn't allocate the free entries */
        sbi->free_clusters = 0;
+       sb->s_dirt = 1;
        err = -ENOSPC;
 
 out:
@@ -509,7 +518,6 @@ out:
        }
        for (i = 0; i < nr_bhs; i++)
                brelse(bhs[i]);
-       fat_clusters_flush(sb);
 
        if (err && idx_clus)
                fat_free_clusters(inode, cluster[0]);
@@ -542,8 +550,10 @@ int fat_free_clusters(struct inode *inode, int cluster)
                }
 
                ops->ent_put(&fatent, FAT_ENT_FREE);
-               if (sbi->free_clusters != -1)
+               if (sbi->free_clusters != -1) {
                        sbi->free_clusters++;
+                       sb->s_dirt = 1;
+               }
 
                if (nr_bhs + fatent.nr_bhs > MAX_BUF_PER_PAGE) {
                        if (sb->s_flags & MS_SYNCHRONOUS) {
@@ -578,7 +588,7 @@ error:
        return err;
 }
 
-EXPORT_SYMBOL(fat_free_clusters);
+EXPORT_SYMBOL_GPL(fat_free_clusters);
 
 int fat_count_free_clusters(struct super_block *sb)
 {
@@ -605,6 +615,7 @@ int fat_count_free_clusters(struct super_block *sb)
                } while (fat_ent_next(sbi, &fatent));
        }
        sbi->free_clusters = free;
+       sb->s_dirt = 1;
        fatent_brelse(&fatent);
 out:
        unlock_fat(sbi);