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wrappers for ->i_mutex access

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parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested},
inode_foo(inode) being mutex_foo(&inode->i_mutex).

Please, use those for access to ->i_mutex; over the coming cycle
->i_mutex will become rwsem, with ->lookup() done with it held
only shared.

Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Al Viro 2016-01-22 15:40:57 -05:00
commit 5955102c99
177 changed files with 908 additions and 883 deletions
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8
fs/direct-io.c
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@ -1157,12 +1157,12 @@ do_blockdev_direct_IO(struct kiocb *iocb, struct inode *inode,
iocb->ki_filp->f_mapping;
/* will be released by direct_io_worker */
mutex_lock(&inode->i_mutex);
inode_lock(inode);
retval = filemap_write_and_wait_range(mapping, offset,
end - 1);
if (retval) {
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
kmem_cache_free(dio_cache, dio);
goto out;
}
@ -1173,7 +1173,7 @@ do_blockdev_direct_IO(struct kiocb *iocb, struct inode *inode,
dio->i_size = i_size_read(inode);
if (iov_iter_rw(iter) == READ && offset >= dio->i_size) {
if (dio->flags & DIO_LOCKING)
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
kmem_cache_free(dio_cache, dio);
retval = 0;
goto out;
@ -1295,7 +1295,7 @@ do_blockdev_direct_IO(struct kiocb *iocb, struct inode *inode,
* of protecting us from looking up uninitialized blocks.
*/
if (iov_iter_rw(iter) == READ && (dio->flags & DIO_LOCKING))
mutex_unlock(&dio->inode->i_mutex);
inode_unlock(dio->inode);
/*
* The only time we want to leave bios in flight is when a successful