[Xen-changelog] [xen-unstable] [LINUX] Allow dma_alloc_coherent() to work for regions up to 2MB.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxxxx
# Node ID 02b0ed160e8ef9b8cdfd8b7e4fdd58fb19f7b344
# Parent  234939c0ec3a14cac448ec65e4dbaa173ccae16b
[LINUX] Allow dma_alloc_coherent() to work for regions up to 2MB.
The previous limit of 0.5MB was insufficient for some drivers
(e.g., when loading firmware).
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
 linux-2.6-xen-sparse/arch/i386/mm/hypervisor.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -r 234939c0ec3a -r 02b0ed160e8e 
linux-2.6-xen-sparse/arch/i386/mm/hypervisor.c
--- a/linux-2.6-xen-sparse/arch/i386/mm/hypervisor.c    Tue Jun 27 12:03:46 
2006 +0100
+++ b/linux-2.6-xen-sparse/arch/i386/mm/hypervisor.c    Tue Jun 27 12:17:45 
2006 +0100
@@ -264,7 +264,7 @@ static void contiguous_bitmap_clear(
 }
 
 /* Protected by balloon_lock. */
-#define MAX_CONTIG_ORDER 7
+#define MAX_CONTIG_ORDER 9 /* 2MB */
 static unsigned long discontig_frames[1<<MAX_CONTIG_ORDER];
 
 /* Ensure multi-page extents are contiguous in machine memory. */

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