linux-kernel - [RFC PATCH 20/21] Call padding callback on flush.

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Date:	Thu, 16 Oct 2008 01:06:55 -0500
From:	Tom Zanussi <zanussi@...cast.net>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:	Martin Bligh <mbligh@...gle.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	prasad@...ux.vnet.ibm.com,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Mathieu Desnoyers <compudj@...stal.dyndns.org>,
	Steven Rostedt <rostedt@...dmis.org>, od@...e.com,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>, hch@....de,
	David Wilder <dwilder@...ibm.com>,
	Jens Axboe <jens.axboe@...cle.com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro>
Subject: [RFC PATCH 20/21]  Call padding callback on flush.

---
 kernel/relay_pagewriter.c |   16 ++++++++++++----
 1 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/kernel/relay_pagewriter.c b/kernel/relay_pagewriter.c
index 9bc1461..c3369f5 100644
--- a/kernel/relay_pagewriter.c
+++ b/kernel/relay_pagewriter.c
@@ -137,10 +137,18 @@ void pagewriter_flush(struct pagewriter *pagewriter)
 		return;
 
 	mutex_lock(&pagewriters_mutex);
-	for_each_possible_cpu(i)
-		if (pagewriter->buf[i])
-			pagewriter->cb->switch_page(pagewriter->buf[i], 0,
-						    NULL);
+	for_each_possible_cpu(i) {
+		struct pagewriter_buf *buf = pagewriter->buf[i];
+		if (buf) {
+			if (buf->pagewriter->flags & PAGEWRITER_PAD_WRITES) {
+				void *padding = buf->data + buf->offset;
+				size_t padlen = PAGE_SIZE - buf->offset;
+				pagewriter->cb->write_padding(buf, padlen,
+							      padding);
+			}
+			pagewriter->cb->switch_page(buf, 0, NULL);
+		}
+	}
 	relay_flush(pagewriter->rchan);
 	mutex_unlock(&pagewriters_mutex);
 }
-- 
1.5.3.5



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