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| author | Christoph Hellwig <hch@lst.de> | 2015-01-14 10:42:32 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-01-20 14:02:58 -0700 |
| commit | b4caecd48005fbed3949dde6c1cb233142fd69e9 (patch) | |
| tree | 1fdd9b7c15568c79eb3c1ed84a39858ddbcbc88b /fs/configfs/inode.c | |
| parent | 97b713ba3ebaa6c8d84c2c720f5468a7c6a6eb4e (diff) | |
| download | linux-stable-b4caecd48005fbed3949dde6c1cb233142fd69e9.tar.gz linux-stable-b4caecd48005fbed3949dde6c1cb233142fd69e9.tar.bz2 linux-stable-b4caecd48005fbed3949dde6c1cb233142fd69e9.zip | |
fs: introduce f_op->mmap_capabilities for nommu mmap support
Since "BDI: Provide backing device capability information [try #3]" the
backing_dev_info structure also provides flags for the kind of mmap
operation available in a nommu environment, which is entirely unrelated
to it's original purpose.
Introduce a new nommu-only file operation to provide this information to
the nommu mmap code instead. Splitting this from the backing_dev_info
structure allows to remove lots of backing_dev_info instance that aren't
otherwise needed, and entirely gets rid of the concept of providing a
backing_dev_info for a character device. It also removes the need for
the mtd_inodefs filesystem.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Tejun Heo <tj@kernel.org>
Acked-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'fs/configfs/inode.c')
| -rw-r--r-- | fs/configfs/inode.c | 18 |
1 files changed, 1 insertions, 17 deletions
diff --git a/fs/configfs/inode.c b/fs/configfs/inode.c index 5946ad98053f..0ad6b4d6de00 100644 --- a/fs/configfs/inode.c +++ b/fs/configfs/inode.c @@ -50,12 +50,6 @@ static const struct address_space_operations configfs_aops = { .write_end = simple_write_end, }; -static struct backing_dev_info configfs_backing_dev_info = { - .name = "configfs", - .ra_pages = 0, /* No readahead */ - .capabilities = BDI_CAP_NO_ACCT_AND_WRITEBACK, -}; - static const struct inode_operations configfs_inode_operations ={ .setattr = configfs_setattr, }; @@ -137,7 +131,7 @@ struct inode *configfs_new_inode(umode_t mode, struct configfs_dirent *sd, if (inode) { inode->i_ino = get_next_ino(); inode->i_mapping->a_ops = &configfs_aops; - inode->i_mapping->backing_dev_info = &configfs_backing_dev_info; + inode->i_mapping->backing_dev_info = &noop_backing_dev_info; inode->i_op = &configfs_inode_operations; if (sd->s_iattr) { @@ -283,13 +277,3 @@ void configfs_hash_and_remove(struct dentry * dir, const char * name) } mutex_unlock(&dir->d_inode->i_mutex); } - -int __init configfs_inode_init(void) -{ - return bdi_init(&configfs_backing_dev_info); -} - -void configfs_inode_exit(void) -{ - bdi_destroy(&configfs_backing_dev_info); -} |