Re: lock_kernel() & kmalloc - evil together?

[Linus Torvalds]

On Fri, 11 Aug 2000, Jeff V. Merkey wrote:
> 
> Thanks!  This is good to know.  This means if I use it inside of
> spinlock_irqsave() outside an interrupt, it will tell me not to context
> switch ....  Need to look at this.

It's wrong.

It _can_ return false positives, but only
 - for a _globally_ disabled irq region
 - and only on SMP.

Basically, the rule is that if you use a global cli/sti region, all bets
are off. 

Spinlocks do not affect the state - not even if they are of the irq-safe
type.

		Linus