From 86c824b9434e764d01489688e4e38aee43b93fcf Mon Sep 17 00:00:00 2001
From: Jens Axboe <jens.axboe@oracle.com>
Date: Wed, 15 Apr 2009 09:00:07 +0200
Subject: [PATCH] bio: add documentation to bio_alloc()

Explain that with __GFP_WAIT set it will not fail, and that the caller
must never allocate more than 1 bio at the time.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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