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writeback: add wbc_to_write_flags()

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Add wbc_to_write_flags(), which returns the write modifier flags to use,
based on a struct writeback_control. No functional changes in this
patch, but it prepares us for factoring other wbc fields for write type.

Signed-off-by: Jens Axboe <axboe@fb.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Jens Axboe
2016-11-01 10:00:38 -06:00
parent 1d796d6a96
commit 7637241e65
8 changed files with 17 additions and 16 deletions
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mm/page_io.c
+1 -4
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@@ -320,10 +320,7 @@ int __swap_writepage(struct page *page, struct writeback_control *wbc,
ret = -ENOMEM;
goto out;
}
if (wbc->sync_mode == WB_SYNC_ALL)
bio_set_op_attrs(bio, REQ_OP_WRITE, REQ_SYNC);
else
bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
bio->bi_opf = REQ_OP_WRITE | wbc_to_write_flags(wbc);
count_vm_event(PSWPOUT);
set_page_writeback(page);
unlock_page(page);