> static void fuse_writepage_finish_stat(struct inode *inode, struct folio
> *folio)
> {
> - struct backing_dev_info *bdi = inode_to_bdi(inode);
> + struct bdi_writeback_ctx *bdi_wb_ctx = fetch_bdi_writeback_ctx(inode);
>
> - dec_wb_stat(&bdi->wb_ctx_arr[0]->wb, WB_WRITEBACK);
> + dec_wb_stat(&bdi_wb_ctx->wb, WB_WRITEBACK);
> node_stat_sub_folio(folio, NR_WRITEBACK_TEMP);
> - wb_writeout_inc(&bdi->wb_ctx_arr[0]->wb);
> + wb_writeout_inc(&bdi_wb_ctx->wb);
> }
There's nothing fuse-specific here except that nothing but fuse uses
NR_WRITEBACK_TEMP. Can we try to move this into the core first so that
the patches don't have to touch file system code?
> - inc_wb_stat(&inode_to_bdi(inode)->wb_ctx_arr[0]->wb, WB_WRITEBACK);
> + inc_wb_stat(&bdi_wb_ctx->wb, WB_WRITEBACK);
> node_stat_add_folio(tmp_folio, NR_WRITEBACK_TEMP);
Same here. On pattern is that fuse and nfs both touch the node stat
and the web stat, and having a common helper doing both would probably
also be very helpful.
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