[f2fs-dev] [PATCH 03/13] writeback: link bdi_writeback to its corresponding bdi_writeback_ctx

[Kundan Kumar]

Introduce a bdi_writeback_ctx field in bdi_writeback. This helps in
fetching the writeback context from the bdi_writeback.

Signed-off-by: Kundan Kumar <kundan.ku...@samsung.com>
Signed-off-by: Anuj Gupta <anuj2...@samsung.com>
---
 mm/backing-dev.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index adf87b036827..5479e2d34160 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -513,15 +513,16 @@ static void wb_update_bandwidth_workfn(struct work_struct 
*work)
  */
 #define INIT_BW                (100 << (20 - PAGE_SHIFT))
 
-static int wb_init(struct bdi_writeback *wb, struct backing_dev_info *bdi,
-                  gfp_t gfp)
+static int wb_init(struct bdi_writeback *wb,
+                  struct bdi_writeback_ctx *bdi_wb_ctx,
+                  struct backing_dev_info *bdi, gfp_t gfp)
 {
        int err;
 
        memset(wb, 0, sizeof(*wb));
 
        wb->bdi = bdi;
-       wb->bdi_wb_ctx = bdi->wb_ctx_arr[0];
+       wb->bdi_wb_ctx = bdi_wb_ctx;
        wb->last_old_flush = jiffies;
        INIT_LIST_HEAD(&wb->b_dirty);
        INIT_LIST_HEAD(&wb->b_io);
@@ -698,7 +699,7 @@ static int cgwb_create(struct backing_dev_info *bdi,
                goto out_put;
        }
 
-       ret = wb_init(wb, bdi, gfp);
+       ret = wb_init(wb, bdi_wb_ctx, bdi, gfp);
        if (ret)
                goto err_free;
 
@@ -843,7 +844,7 @@ static int cgwb_bdi_init(struct backing_dev_info *bdi)
                mutex_init(&bdi->cgwb_release_mutex);
                init_rwsem(&bdi_wb_ctx->wb_switch_rwsem);
 
-               ret = wb_init(&bdi_wb_ctx->wb, bdi, GFP_KERNEL);
+               ret = wb_init(&bdi_wb_ctx->wb, bdi_wb_ctx, bdi, GFP_KERNEL);
                if (!ret) {
                        bdi_wb_ctx->wb.memcg_css = &root_mem_cgroup->css;
                        bdi_wb_ctx->wb.blkcg_css = blkcg_root_css;
@@ -1000,7 +1001,7 @@ static int cgwb_bdi_init(struct backing_dev_info *bdi)
        for_each_bdi_wb_ctx(bdi, bdi_wb_ctx) {
                int ret;
 
-               ret = wb_init(&bdi_wb_ctx->wb, bdi, GFP_KERNEL);
+               ret = wb_init(&bdi_wb_ctx->wb, bdi_wb_ctx, bdi, GFP_KERNEL);
                if (ret)
                        return ret;
        }
-- 
2.25.1



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