[PATCH] docs: filesystems: escape errant underscore in porting.rst

[Jay Winston <jaybenjaminwinston@gmail.com>]

filename_...() seems to be literal text whereas Sphinx thinks filename_ is
a link. Wrap all with double backticks to quiet Sphinx warning and wrap
do_{...}() as well for consistency.

Signed-off-by: Jay Winston <jaybenjaminwinston@gmail.com>
---
 Documentation/filesystems/porting.rst | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Documentation/filesystems/porting.rst b/Documentation/filesystems/porting.rst
index 8bf09b2ea912..86d722ddd40e 100644
--- a/Documentation/filesystems/porting.rst
+++ b/Documentation/filesystems/porting.rst
@@ -1345,6 +1345,6 @@ implementation should set it to generic_setlease().
 
 **mandatory**
 
-do_{mkdir,mknod,link,symlink,renameat2,rmdir,unlink}() are gone; filename_...()
-counterparts replace those.  The difference is that the former used to consume
-filename references; the latter do not.
+``do_{mkdir,mknod,link,symlink,renameat2,rmdir,unlink}()`` are gone;
+``filename_...()`` counterparts replace those.  The difference is that the
+former used to consume filename references; the latter do not.
-- 
2.46.4