fat: mmu_private race fix

[safe/jmp/linux-2.6] / fs / fat / fat.h

diff --git a/fs/fat/fat.h b/fs/fat/fat.h
index a69f7f9..4efc503 100644 (file)
--- a/fs/fat/fat.h
+++ b/fs/fat/fat.h
@@ -91,7 +91,9 @@ struct msdos_inode_info {
        /* for avoiding the race between fat_free() and fat_get_cluster() */
        unsigned int cache_valid_id;
 
-       loff_t mmu_private;
+       /* NOTE: mmu_private is 64bits, so must hold ->i_mutex to access */
+       loff_t mmu_private;     /* physically allocated size */
+
        int i_start;            /* first cluster or 0 */
        int i_logstart;         /* logical first cluster */
        int i_attrs;            /* unused attribute bits */
@@ -222,7 +224,7 @@ extern void fat_cache_inval_inode(struct inode *inode);
 extern int fat_get_cluster(struct inode *inode, int cluster,
                           int *fclus, int *dclus);
 extern int fat_bmap(struct inode *inode, sector_t sector, sector_t *phys,
-                   unsigned long *mapped_blocks);
+                   unsigned long *mapped_blocks, int create);
 
 /* fat/dir.c */
 extern const struct file_operations fat_dir_operations;