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authorChristoph Hellwig <hch@lst.de>2015-01-14 12:42:32 +0300
committerJens Axboe <axboe@fb.com>2015-01-21 00:02:58 +0300
commitb4caecd48005fbed3949dde6c1cb233142fd69e9 (patch)
tree1fdd9b7c15568c79eb3c1ed84a39858ddbcbc88b /include/linux/cdev.h
parent97b713ba3ebaa6c8d84c2c720f5468a7c6a6eb4e (diff)
downloadlinux-b4caecd48005fbed3949dde6c1cb233142fd69e9.tar.xz
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 'include/linux/cdev.h')
-rw-r--r--include/linux/cdev.h2
1 files changed, 0 insertions, 2 deletions
diff --git a/include/linux/cdev.h b/include/linux/cdev.h
index fb4591977b03..f8763615a5f2 100644
--- a/include/linux/cdev.h
+++ b/include/linux/cdev.h
@@ -30,6 +30,4 @@ void cdev_del(struct cdev *);
void cd_forget(struct inode *);
-extern struct backing_dev_info directly_mappable_cdev_bdi;
-
#endif