From: Bernd Schmidt <bernd.schmidt@analog.com>
Date: Wed, 10 Oct 2007 09:54:19 +0000 (+0800)
Subject: Blackfin arch: fix bug libstdc++ calling writev with an iovec containing { NULL,... 
X-Git-Tag: v2.6.24-rc1~1462^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bc41bb11654f7fbb8cae2d316a7c2ac5ebf759d2;p=pandora-kernel.git

Blackfin arch: fix bug libstdc++ calling writev with an iovec containing { NULL, 0 } fails on Blackfin

Fix a problem reported in the forums - libstdc++ can call writev with an
iovec containing { NULL, 0 }, which works fine on i686-linux, but fails on
Blackfin.  Fixed by allowing size 0 transfers to/from userspace regardless
of the address.

Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
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