From: Rusty Russell <rusty@rustcorp.com.au>
Date: Fri, 30 May 2008 20:09:40 +0000 (-0500)
Subject: lguest: use ioremap_cache, not ioremap
X-Git-Tag: v2.6.26-rc5~30^2~12
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=e27810f11340987df123a99eb9ae14c054a55639;p=linux-2.6-omap-h63xx.git

lguest: use ioremap_cache, not ioremap

Thanks to Jon Corbet & LWN.  Only took me a day to join the dots.

Host->Guest netcat before (with unnecessily large receive buffers):
1073741824 bytes (1.1 GB) copied, 24.7528 seconds, 43.4 MB/s

After:
1073741824 bytes (1.1 GB) copied, 17.6369 seconds, 60.9 MB/s

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---

diff --git a/drivers/lguest/lguest_device.c b/drivers/lguest/lguest_device.c
index 8080249957a..f4fdf351a7c 100644
--- a/drivers/lguest/lguest_device.c
+++ b/drivers/lguest/lguest_device.c
@@ -27,7 +27,7 @@ static unsigned int dev_index;
  * __iomem to quieten sparse. */
 static inline void *lguest_map(unsigned long phys_addr, unsigned long pages)
 {
-	return (__force void *)ioremap(phys_addr, PAGE_SIZE*pages);
+	return (__force void *)ioremap_cache(phys_addr, PAGE_SIZE*pages);
 }
 
 static inline void lguest_unmap(void *addr)