On Wed, 4 Jan 2017 02:01:27 +0300 Alexey Dobriyan <[email protected]> wrote:
> Now that %z is standartised in C99 there is no reason to support %Z. > Unlike %L it doesn't even make format strings smaller. > > Use BUILD_BUG_ON in a couple ATM drivers. > > In case anyone didn't notice lib/vsprintf.o is about half of SLUB > which is in my opinion is quite an achievement. Hopefully this patch > inspires someone else to trim vsprintf.c more. There's a risk that more %Z uses will sneak into the tree during the 4.10 development cycle, and possibly even later. So I added a note-to-self to re-grep the tree before sending this upstream, but that won't prevent people adding new instances later on: code which was tested under earlier kernels which has %Z support. The best suggestion I have is to add a checkpatch rule to try to catch new %Z's being added.
