diff --git a/block.c b/block.c
index 14f8202..b5e64ec 100644
--- a/block.c
+++ b/block.c
@@ -4313,6 +4313,22 @@
     return qemu_memalign((bs && bs->buffer_alignment) ? bs->buffer_alignment : 512, size);
 }
 
+/*
+ * Check if all memory in this vector is sector aligned.
+ */
+bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov)
+{
+    int i;
+
+    for (i = 0; i < qiov->niov; i++) {
+        if ((uintptr_t) qiov->iov[i].iov_base % bs->buffer_alignment) {
+            return false;
+        }
+    }
+
+    return true;
+}
+
 void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable)
 {
     int64_t bitmap_size;
diff --git a/block/raw-posix.c b/block/raw-posix.c
index 0e705ba..c3d7fda 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -430,22 +430,6 @@
 #endif
 */
 
-/*
- * Check if all memory in this vector is sector aligned.
- */
-static int qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov)
-{
-    int i;
-
-    for (i = 0; i < qiov->niov; i++) {
-        if ((uintptr_t) qiov->iov[i].iov_base % bs->buffer_alignment) {
-            return 0;
-        }
-    }
-
-    return 1;
-}
-
 static ssize_t handle_aiocb_ioctl(RawPosixAIOData *aiocb)
 {
     int ret;
@@ -714,7 +698,7 @@
      * driver that it needs to copy the buffer.
      */
     if ((bs->open_flags & BDRV_O_NOCACHE)) {
-        if (!qiov_is_aligned(bs, qiov)) {
+        if (!bdrv_qiov_is_aligned(bs, qiov)) {
             type |= QEMU_AIO_MISALIGNED;
 #ifdef CONFIG_LINUX_AIO
         } else if (s->use_aio) {
diff --git a/include/block/block.h b/include/block/block.h
index 0719339..ffd1936 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -349,6 +349,7 @@
 
 void bdrv_set_buffer_alignment(BlockDriverState *bs, int align);
 void *qemu_blockalign(BlockDriverState *bs, size_t size);
+bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov);
 
 #define BDRV_SECTORS_PER_DIRTY_CHUNK 2048