From: Sepherosa Ziehau <sephe@dragonflybsd.org>
Date: Sun, 7 Oct 2012 04:40:57 +0000 (+0800)
Subject: busdma: Utilize kmalloc_powerof2()
X-Git-Tag: v3.2.0~10
X-Git-Url: http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff_plain/8e469b97783c14679448b8ed428d169b234b5108

busdma: Utilize kmalloc_powerof2()
---

diff --git a/sys/platform/pc32/i386/busdma_machdep.c b/sys/platform/pc32/i386/busdma_machdep.c
index a8cff4e..35be77b 100644
--- a/sys/platform/pc32/i386/busdma_machdep.c
+++ b/sys/platform/pc32/i386/busdma_machdep.c
@@ -573,13 +573,8 @@ bus_dmamem_alloc(bus_dma_tag_t dmat, void **vaddr, int flags,
 		 */
 		maxsize = check_kmalloc(dmat, *vaddr, 0);
 		if (maxsize) {
-			size_t size;
-
 			kfree(*vaddr, M_DEVBUF);
-			/* XXX check for overflow? */
-			for (size = 1; size <= maxsize; size <<= 1)
-				;
-			*vaddr = kmalloc(size, M_DEVBUF, mflags);
+			*vaddr = kmalloc_powerof2(maxsize, M_DEVBUF, mflags);
 			check_kmalloc(dmat, *vaddr, 1);
 		}
 	} else {
diff --git a/sys/platform/pc64/x86_64/busdma_machdep.c b/sys/platform/pc64/x86_64/busdma_machdep.c
index b94f358..151f9bf 100644
--- a/sys/platform/pc64/x86_64/busdma_machdep.c
+++ b/sys/platform/pc64/x86_64/busdma_machdep.c
@@ -573,13 +573,8 @@ bus_dmamem_alloc(bus_dma_tag_t dmat, void **vaddr, int flags,
 		 */
 		maxsize = check_kmalloc(dmat, *vaddr, 0);
 		if (maxsize) {
-			size_t size;
-
 			kfree(*vaddr, M_DEVBUF);
-			/* XXX check for overflow? */
-			for (size = 1; size <= maxsize; size <<= 1)
-				;
-			*vaddr = kmalloc(size, M_DEVBUF, mflags);
+			*vaddr = kmalloc_powerof2(maxsize, M_DEVBUF, mflags);
 			check_kmalloc(dmat, *vaddr, 1);
 		}
 	} else {