Since we have multiple cgwb per bdi, embedded in writeback_ctx now, we
iterate over all of them to find the associated writeback.
Signed-off-by: Kundan Kumar <kundan.kumar@xxxxxxxxxxx>
Signed-off-by: Anuj Gupta <anuj20.g@xxxxxxxxxxx>
---
fs/fs-writeback.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 9529e16c9b66..72b73c3353fe 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -1091,6 +1091,7 @@ int cgroup_writeback_by_id(u64 bdi_id, int memcg_id,
struct backing_dev_info *bdi;
struct cgroup_subsys_state *memcg_css;
struct bdi_writeback *wb;
+ struct bdi_writeback_ctx *bdi_wb_ctx;
struct wb_writeback_work *work;
unsigned long dirty;
int ret;
@@ -1114,7 +1115,11 @@ int cgroup_writeback_by_id(u64 bdi_id, int memcg_id,
* And find the associated wb. If the wb isn't there already
* there's nothing to flush, don't create one.
*/
- wb = wb_get_lookup(bdi->wb_ctx_arr[0], memcg_css);
+ for_each_bdi_wb_ctx(bdi, bdi_wb_ctx) {
+ wb = wb_get_lookup(bdi_wb_ctx, memcg_css);
+ if (wb)
+ break;
+ }
if (!wb) {
ret = -ENOENT;
goto out_css_put;
--
2.25.1
