Flip the polarity of mapping_cap_account_dirty() test so that the body
of page accounting can be moved outside the if () block. This will
help adding cgroup writeback support.
This causes no logic changes.
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
Cc: Wu Fengguang <fengguang.wu@xxxxxxxxx>
---
mm/page-writeback.c | 19 ++++++++++---------
1 file changed, 10 insertions(+), 9 deletions(-)
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 026c91b..d73539f 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2094,15 +2094,16 @@ void account_page_dirtied(struct page *page, struct address_space *mapping)
{
trace_writeback_dirty_page(page, mapping);
- if (mapping_cap_account_dirty(mapping)) {
- __inc_zone_page_state(page, NR_FILE_DIRTY);
- __inc_zone_page_state(page, NR_DIRTIED);
- __inc_wb_stat(&mapping->backing_dev_info->wb, WB_RECLAIMABLE);
- __inc_wb_stat(&mapping->backing_dev_info->wb, WB_DIRTIED);
- task_io_account_write(PAGE_CACHE_SIZE);
- current->nr_dirtied++;
- this_cpu_inc(bdp_ratelimits);
- }
+ if (!mapping_cap_account_dirty(mapping))
+ return;
+
+ __inc_zone_page_state(page, NR_FILE_DIRTY);
+ __inc_zone_page_state(page, NR_DIRTIED);
+ __inc_wb_stat(&mapping->backing_dev_info->wb, WB_RECLAIMABLE);
+ __inc_wb_stat(&mapping->backing_dev_info->wb, WB_DIRTIED);
+ task_io_account_write(PAGE_CACHE_SIZE);
+ current->nr_dirtied++;
+ this_cpu_inc(bdp_ratelimits);
}
EXPORT_SYMBOL(account_page_dirtied);
--
2.1.0
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