Re: [GIT PULL] Driver core changes for 7.0-rc1

[Danilo Krummrich]

On Sun Mar 1, 2026 at 10:01 PM CET, Linus Torvalds wrote:
> So the thing that would matter is the longest actual real driver name.
> Aren't those typically just a few bytes (eg "regulator-bus-drv" or
> "__typec_altmode_driver" being long ones I find with a bad grep
> pattern that might miss millions of other cases)

Yes, generally they should be pretty short.

OOC, I asked an LLM to figure it out (so take this with the necessary grain of
salt):

	Out of ~7,560 unique driver names:
	
	┌────────────┬───────────┐
	│ Threshold  │   Count   │
	├────────────┼───────────┤
	│ > 32 chars │ 6 (0.08%) │
	├────────────┼───────────┤
	│ > 48 chars │ 1 (0.01%) │
	├────────────┼───────────┤
	│ > 64 chars │ 0         │
	└────────────┴───────────┘
	
	Length distribution
	
	 1-10 chars:  3,513  (46.5%)
	11-16 chars:  3,111  (41.1%)
	17-24 chars:    880  (11.6%)
	25-32 chars:     50  ( 0.7%)
	33-49 chars:      6  ( 0.1%)

> IOW, it looks like it would be fine to just say "use just a 32-byte
> buffer" if a buffer is needed.

Assuming the above is roughly correct, you are pretty close. :)

> Of course, if no buffer is needed that's even better.

Yes, I don't think we ever need to obtain a copy other than through
sysfs_emit().