On Mon, Jun 21, 2021 at 04:53:09PM +0200, Christoph Hellwig wrote:

On Mon, Jun 21, 2021 at 02:46:37PM +0000, Al Viro wrote:

quoted

TBH, I would rather take that one into fs/filesystems.c.  Rationale:
get_filesystem_list(), for all its resemblance to /proc/filesystems
contents, is used only by init/*.c and it's not a big deal to make
it

Yeah, unwinding this mess actually is a good idea.  I didn't really
look outside of do_mounts.c, but once doing that it becomes completely
obvious.

quoted

int __init get_filesystem_list(char *buf, bool is_dev)

As-is we don't even really need the is_dev argument, as the only
callers wants block device file systems anyway.

*nod*

In fact it would
much rather have a cursor based iteration so that we can skip the
allocation, but that is probaby overengineering the problem.

Very much so.

Sigh...  I really wish we had more uniform syntax, though -
e.g.  root=nfs(<options>) or root=xfs(sdb11,noatime), etc.
Oh, well...