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[Qemu-devel] [PATCH 37/41] cow: use bdrv_co_is_allocated()

From: Kevin Wolf
Subject: [Qemu-devel] [PATCH 37/41] cow: use bdrv_co_is_allocated()
Date: Mon, 5 Dec 2011 15:21:14 +0100

From: Stefan Hajnoczi <address@hidden>

Now that bdrv_co_is_allocated() is available we can use it instead of
the synchronous bdrv_is_allocated() interface.  This is a follow-up that
Kevin Wolf <address@hidden> pointed out after applying the series that
introduces bdrv_co_is_allocated().

It is safe to make cow_read() a coroutine_fn because its only caller is
a coroutine_fn.

Signed-off-by: Stefan Hajnoczi <address@hidden>
Signed-off-by: Kevin Wolf <address@hidden>
 block/cow.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/block/cow.c b/block/cow.c
index 7ae887b..586493c 100644
--- a/block/cow.c
+++ b/block/cow.c
@@ -171,14 +171,14 @@ static int cow_update_bitmap(BlockDriverState *bs, 
int64_t sector_num,
     return error;
-static int cow_read(BlockDriverState *bs, int64_t sector_num,
-                    uint8_t *buf, int nb_sectors)
+static int coroutine_fn cow_read(BlockDriverState *bs, int64_t sector_num,
+                                 uint8_t *buf, int nb_sectors)
     BDRVCowState *s = bs->opaque;
     int ret, n;
     while (nb_sectors > 0) {
-        if (bdrv_is_allocated(bs, sector_num, nb_sectors, &n)) {
+        if (bdrv_co_is_allocated(bs, sector_num, nb_sectors, &n)) {
             ret = bdrv_pread(bs->file,
                         s->cow_sectors_offset + sector_num * 512,
                         buf, n * 512);

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