[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@xensource.com>

diff --git a/linux-2.6-xen-sparse/arch/i386/mm/hypervisor.c b/linux-2.6-xen-sparse/arch/i386/mm/hypervisor.c
index a358373c89a20475b6ba1ac336b22c0b78b381ca..66fbdcbf41e39f77916907219608b3b8c2cdba9c 100644 (file)
--- a/linux-2.6-xen-sparse/arch/i386/mm/hypervisor.c
+++ b/linux-2.6-xen-sparse/arch/i386/mm/hypervisor.c
@@ -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. */