On Fri, May 29, 2020 at 08:03:02AM -0500, Eric W. Biederman wrote:

Luis Chamberlain [off-list ref] writes:

quoted

The way to create a subdirectory from the base set of directories
is a bit obscure, so provide a helper which makes this clear, and
also helps remove boiler plate code required to do this work.

I agreee calling:
register_sysctl("fs/binfmt_misc", sysctl_mount_point)
is a bit obscure but if you are going to make a wrapper
please make it the trivial one liner above.

Say something that looks like:
	struct sysctl_header *register_sysctl_mount_point(const char *path)
        {
        	return register_sysctl(path, sysctl_mount_point);
        }

And yes please talk about a mount point and not an empty dir, as these
are permanently empty directories to serve as mount points.  There are
some subtle but important permission checks this allows in the case of
unprivileged mounts.

Further code like this belong in proc_sysctl.c next to all of the code
it is related to so that it is easier to see how to refactor the code if
necessary.

Alrighty, it's been a while since this kernel/sysctl.c kitchen sink
cleanup... so it's time to respin this now that the merge window is
open.  I already rebased patches, addressed all input and now just
waiting to fix any compilation errors.  I'm going to split the patches
up into real small sets so to ensure we just get this through becauase
getting this in otherwise is going to be hard.

I'd appreciate folk's review once the patches start going out. I think
a hard part will be deciding what tree this should got through.

  Luis