Merge branch 'master'; commit 'v2.6.38-rc7' into next

[firefly-linux-kernel-4.4.55.git] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index bd3215940c3746ec22d8351854649f9b5b485f67..af5bd7a629e5da1964d9b3b7898c8391fc90d8a3 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -649,6 +649,7 @@ struct address_space {
        spinlock_t              private_lock;   /* for use by the address_space */
        struct list_head        private_list;   /* ditto */
        struct address_space    *assoc_mapping; /* ditto */
+       struct mutex            unmap_mutex;    /* to protect unmapping */
 } __attribute__((aligned(sizeof(long))));
        /*
         * On most architectures that alignment is already the case; but
@@ -797,8 +798,7 @@ struct inode {
 #endif
 
 #ifdef CONFIG_IMA
-       /* protected by i_lock */
-       unsigned int            i_readcount; /* struct files open RO */
+       atomic_t                i_readcount; /* struct files open RO */
 #endif
        atomic_t                i_writecount;
 #ifdef CONFIG_SECURITY
@@ -2139,7 +2139,7 @@ extern void check_disk_size_change(struct gendisk *disk,
                                   struct block_device *bdev);
 extern int revalidate_disk(struct gendisk *);
 extern int check_disk_change(struct block_device *);
-extern int __invalidate_device(struct block_device *);
+extern int __invalidate_device(struct block_device *, bool);
 extern int invalidate_partition(struct gendisk *, int);
 #endif
 unsigned long invalidate_mapping_pages(struct address_space *mapping,
@@ -2199,6 +2199,26 @@ static inline void allow_write_access(struct file *file)
        if (file)
                atomic_inc(&file->f_path.dentry->d_inode->i_writecount);
 }
+#ifdef CONFIG_IMA
+static inline void i_readcount_dec(struct inode *inode)
+{
+       BUG_ON(!atomic_read(&inode->i_readcount));
+       atomic_dec(&inode->i_readcount);
+}
+static inline void i_readcount_inc(struct inode *inode)
+{
+       atomic_inc(&inode->i_readcount);
+}
+#else
+static inline void i_readcount_dec(struct inode *inode)
+{
+       return;
+}
+static inline void i_readcount_inc(struct inode *inode)
+{
+       return;
+}
+#endif
 extern int do_pipe_flags(int *, int);
 extern struct file *create_read_pipe(struct file *f, int flags);
 extern struct file *create_write_pipe(int flags);
@@ -2225,6 +2245,7 @@ extern loff_t vfs_llseek(struct file *file, loff_t offset, int origin);
 
 extern int inode_init_always(struct super_block *, struct inode *);
 extern void inode_init_once(struct inode *);
+extern void address_space_init_once(struct address_space *mapping);
 extern void ihold(struct inode * inode);
 extern void iput(struct inode *);
 extern struct inode * igrab(struct inode *);