linux-kernel - Re: can a kmalloc be both GFP_ATOMIC and GFP

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Date:	Tue, 1 May 2007 00:34:10 +0530
From:	"Satyam Sharma" <satyam.sharma@...il.com>
To:	"Alan Cox" <alan@...rguk.ukuu.org.uk>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Robert P. J. Day" <rpjday@...dspring.com>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: Re: can a kmalloc be both GFP_ATOMIC and GFP_KERNEL at the same time?

On 4/30/07, Alan Cox <alan@...rguk.ukuu.org.uk> wrote:
> i2o/device.c should be GFP_KERNEL as far as I can tell. It was meant to
> be that way and the callers appear to all be calling it in sleep capable
> contexts.
>
> aic7xxx_old.c should probably be GFP_KERNEL as ->slave_alloc methods
> appear to be able to sleep (although some drivers use GFP_ATOMIC here and
> some GFP_KERNEL).

Yes, none of the above appear to be atomic contexts. GFP_KERNEL in
that case would've been a bug. If they were atomic contexts, someone
somewhere would've been seeing a lot of "BUG: sleeping function called
from invalid context" messages and would've probably brought it to
lkml's notice already ;-) So the GFP_ATOMIC seems to be redundant
thing here in both cases.
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