Re: mem=16MB laptop testing

Russell King
2003-10-14T12:19:11Z

On Tue, Oct 14, 2003 at 05:10:31AM -0700, Andrew Morton wrote:
> Russell King <rmk+lkml@arm.linux.org.uk> wrote:
> > On Tue, Oct 14, 2003 at 04:56:14AM -0700, Andrew Morton wrote:
> > > I guess not mounting /sys doesn't help here. It would be nice. Maybe with
> > > a CONFIG_I_WILL_NEVER_MOUNT_SYSFS we could avoid all those allocations.
> >
> > I believe sysfs is required for mounting the root filesystem - see
> > name_to_dev_t in init/do_mounts.c.
>
> OK. But it looks like if /sys is empty and you provide "root=03:02" then
> things will still work. It's a matter of trying it...

Uhh?

dev_t name_to_dev_t(char *name)
{
dev_t res = 0;

sys_mkdir("/sys", 0700);
if (sys_mount("sysfs", "/sys", "sysfs", 0, NULL) < 0)
goto out;

...

out:
sys_rmdir("/sys");
return res;
}

If sysfs can't be mounted, then it looks like we can't even decode a
numeric major:minor root device specification.

--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 PCMCIA - http://pcmcia.arm.linux.org.uk/
2.6 Serial core