Re: [PATCH] sysfs: Remove page boundary align limitation on sysfs_emit and sysfs_emit_at

[Greg Kroah-Hartman]

On Wed, Sep 08, 2021 at 03:33:51PM +0000, Yu, Lang wrote:
> >Please feel free to add better documentation for the functions if you feel people
> >are getting confused, do not change the existing behavior of the code as it rightly
> >caught it being misused.
> 
> You can find many patches named "convert sysfs scnprintf/snprintf to syfs_emit/sysfs_emit_at".
> or "use sysfs_emit/sysfs_emit_at in show functions". They may think it's better to use syfs_emit/sysfs_emit_at
> given its overrun avoidance.

Yes, and using that in sysfs functions is fine, there is nothing wrong
with this usage.

> But there are still some corner cases(e.g., a non page boundary aligned buf address : ).

I need a specific example of where this has gone wrong.  Please provide
a lore.kernel.org link as I fail to see the problem here.

Are you sure that you are not just abusing sysfs and having more than
one value per file?  Does this mean I need to go audit all of the gpu
sysfs file entries?

thanks,

greg k-h