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Subject[PATCH 3/9] iomap: Use kzalloc to allocate iomap_page
Date
We can skip most of the initialisation, although spinlocks still
need explicit initialisation as architectures may use a non-zero
value to indicate unlocked. The comment is no longer useful as
attach_page_private() handles the refcount now.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
fs/iomap/buffered-io.c | 10 +---------
1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 13d5cdab8dcd..639d54a4177e 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -49,16 +49,8 @@ iomap_page_create(struct inode *inode, struct page *page)
if (iop || i_blocks_per_page(inode, page) <= 1)
return iop;

- iop = kmalloc(sizeof(*iop), GFP_NOFS | __GFP_NOFAIL);
- atomic_set(&iop->read_count, 0);
- atomic_set(&iop->write_count, 0);
+ iop = kzalloc(sizeof(*iop), GFP_NOFS | __GFP_NOFAIL);
spin_lock_init(&iop->uptodate_lock);
- bitmap_zero(iop->uptodate, PAGE_SIZE / SECTOR_SIZE);
-
- /*
- * migrate_page_move_mapping() assumes that pages with private data have
- * their count elevated by 1.
- */
attach_page_private(page, iop);
return iop;
}
--
2.28.0
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