From: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Date: Thu, 9 Aug 2012 12:30:39 +0000 (+0900)
Subject: virtio/console: Add splice_write support
X-Git-Tag: omap-for-v3.7-rc1/fixes-hwmod-clock-signed-v3~5^2~23
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eb5e89fc70bb3f115b3206ed0c57d3aba1fdd155;p=pandora-kernel.git

virtio/console: Add splice_write support

Enable to use splice_write from pipe to virtio-console port.
This steals pages from pipe and directly send it to host.

Note that this may accelerate only the guest to host path.

Changes in v2:
 - Use GFP_KERNEL instead of GFP_ATOMIC in syscall context function.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Acked-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---

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