Re: [PATCH] cryptoapi: Fix sleeping

[Matt Mackall <mpm@selenic.com>]

On Wed, Aug 13, 2003 at 08:21:05PM -0400, Jeff Garzik wrote:
> Matt Mackall wrote:
> >We need in_atomic() so that we can call from regions where preempt is
> >disabled, for instance when using per_cpu crypto tfms.
> >
> >diff -urN -X dontdiff orig/crypto/internal.h work/crypto/internal.h
> >+++ work/crypto/internal.h	2003-08-12 14:38:54.000000000 -0500
> >@@ -37,7 +37,7 @@
> > 
> > static inline void crypto_yield(struct crypto_tfm *tfm)
> > {
> >-	if (!in_softirq())
> >+	if (!in_atomic())
> > 		cond_resched();
> 
> 
> Do you really want to schedule inside preempt_disable() ?

No, that's the point. Cryptoapi has hidden scheduling points and the
above code is what's used to check that it doesn't do so when it ought
not. But it was broken inside of no-preempt sections.

-- 
Matt Mackall : http://www.selenic.com : of or relating to the moon