Omar Sandoval f31b9c8fe7 UPSTREAM: debugfs: add debugfs_lookup() ... We don't always have easy access to the dentry of a file or directory we created in debugfs. Add a helper which allows us to get a dentry we previously created. The motivation for this change is a problem with blktrace and the blk-mq debugfs entries introduced in 07e4fead45 ("blk-mq: create debugfs directory tree"). Namely, in some cases, the directory that blktrace needs to create may already exist, but in other cases, it may not. We _could_ rely on a bunch of implied knowledge to decide whether to create the directory or not, but it's much cleaner on our end to just look it up. Signed-off-by: Omar Sandoval <osandov@fb.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Jens Axboe <axboe@fb.com> (cherry picked from commit a7c5437b0b) Change-Id: I77b6f2c7df32f904099d23771a53065315cfdc12		2017-07-26 15:07:32 +08:00
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file.c	debugfs: Add debugfs_create_ulong()	2015-10-18 10:14:39 -07:00
inode.c	UPSTREAM: debugfs: add debugfs_lookup()	2017-07-26 15:07:32 +08:00
Makefile