Matthew Wilcox [off-list ref] writes:

On Fri, Jul 30, 2021 at 08:51:29AM -0600, Jonathan Corbet wrote:

quoted

Cai Huoqing [off-list ref] writes:

quoted

Fix typo: iff  ==> if

Signed-off-by: Cai Huoqing <redacted>

This is becoming an FAQ ...  "iff" in mathematical English means "if and
only if"; its usage in these documents is correct.

... and yet it's clearly not understood.  Similarly to the [start..end)
convention (also the [start..end[ convention).  Should we deprecate
use of it in kernel documentation, and if so, what should we replace it
with?

I'm never quite sure what to do with these things...we want to be
inclusive, but we don't want to hobble the language we use beyond a
certain point.  We could ask people to spell out "if and only if", I
suppose, but that sounds like the kind of thing that leads to unpleasant
messages in my inbox.

Thanks,

jon