Re: [PATCH] sysfs: add /sys/dev/{char, block} to lookup sysfs pathby major:minor

[H. Peter Anvin]

Dan Williams wrote:
> What are the alternatives?:
> 1/ Add an ioctl to return the path: Doable, but sysfs is meant to reduce
>    the need to proliferate ioctl interfaces into the kernel, so this
>    seems counter productive.
>
> 2/ Use udev to create these symlinks: Also doable, but it adds a
>    udev dependency to utilities that might be running in a limited
>    environment like an initramfs.

3, of course, is what applications have to do today, which is to do a 
full-tree search of sysfs.

Given that this appears to be fairly little code it would make sense to 
me; one could argue if /sys/dev/block/8/32 would be better than 
/sys/dev/block/8:32, but (a) I don't think it matters and (b) the 
non-atomicity of the former would

	-hpa
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