ext4: print more sysadmin-friendly message in check_block_validity()
(cherry picked from commit
80e42468d65475e92651e62175bb7807773321d0)
Drop the WARN_ON(1), as he stack trace is not appropriate, since it is
triggered by file system corruption, and it misleads users into
thinking there is a kernel bug. In addition, change the message
displayed by ext4_error() to make it clear that this is a file system
corruption problem.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>