Subject: Re: Kernel copyin/out optimizations for ARM...
To: David Laight <email@example.com>
From: Richard Earnshaw <firstname.lastname@example.org>
Date: 03/15/2002 10:03:17
> Looks pretty good, though I haven't tried it.
> One thing I've noticed by inspection is that we are using ldr(t) + masking
> for in_short. This may start to fail on future kernels 'cos we may well
> turn on strict alignment checking. Can you fix that bit to use ldrb(t)
> plus an orr?
Err, forget that. It isn't the bit of code I thought it was ;-(
However, I wouldn't recommend the use of swp except when a locked transfer
is really needed -- it can have nasty cache implications.