[Qemu-devel] [PULL 21/42] cow: do not call bdrv_co_is_allocated

[Stefan Hajnoczi]

From: Paolo Bonzini <address@hidden>

As we change bdrv_is_allocated to gather more information from bs and
bs->file, it will become a bit slower.  It is still appropriate for online
jobs, but not for reads/writes.  Call the internal function instead.

Reviewed-by: Eric Blake <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
 block/cow.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/cow.c b/block/cow.c
index cd889e6..f4eca10 100644
--- a/block/cow.c
+++ b/block/cow.c
@@ -212,7 +212,7 @@ static int coroutine_fn cow_read(BlockDriverState *bs, 
int64_t sector_num,
     int ret, n;
 
     while (nb_sectors > 0) {
-        if (bdrv_co_is_allocated(bs, sector_num, nb_sectors, &n)) {
+        if (cow_co_is_allocated(bs, sector_num, nb_sectors, &n)) {
             ret = bdrv_pread(bs->file,
                         s->cow_sectors_offset + sector_num * 512,
                         buf, n * 512);
-- 
1.8.3.1