dired-jump is an interactive autoloaded compiled Lisp function in `
It is bound to C-x C-j.
(dired-jump &optional OTHER-WINDOW FILE-NAME)
Jump to Dired buffer corresponding to current buffer.
If in a file, Dired the current directory and move to file's line.
If in Dired already, pop up a level and goto old directory's line.
In case the proper Dired file line cannot be found, refresh the dired
buffer and try again.
When OTHER-WINDOW is non-nil, jump to Dired buffer in other window.
Interactively with prefix argument, read FILE-NAME and
move to its line in dired.