Re: [RFC][PATCH] Fix lock inversion aio_kick_handler()

From: Benjamin LaHaise
Date: Fri Jul 28 2006 - 21:38:04 EST

On Fri, Jul 28, 2006 at 05:10:32PM -0700, Zach Brown wrote:
> Fix lock inversion aio_kick_handler()

Doh. Unfortunately, this patch isn't entirely correct as it could race with
__put_ioctx() which sets ioctx->mm = NULL. Something like the following
should do the trick:

struct mm_struct *mm;
> - unuse_mm(ctx->mm);
+ mm = ctx->mm;
> spin_unlock_irq(&ctx->ctx_lock);
+ unuse_mm(mm);
> set_fs(oldfs);
> /*

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