Re: [lkcd-devel] Re: [PATCH] Poll-based IDE driver

[Stephen Hemminger]

On Wed, 8 Oct 2003 17:44:58 +0530
Srivatsa Vaddagiri <vatsa@xxxxxxxxxx> wrote:

> On Wed, Oct 08, 2003 at 12:50:51PM +0100, Dave Jones wrote:
> > 
> > Why not just use udelay() ?  The above code cannot possibly do
> > the right thing on all processors.
> 
> Since my code is supposed to run when system is crashing, I would like 
> to avoid calling any function in the kernel as far as possible, since 
> the kernel and its data structures may be in a inconsistent state 
> and/or corrupted.

If your kernel context is alive enough to take the dump, then it should
be able to call things like udelay() that don't modify any data.  If it
can't your hosed already...
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