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Date: Tue, 25 Aug 2020 13:49:53 -0700 From: "Darrick J. Wong" <darrick.wong@...cle.com> To: "Matthew Wilcox (Oracle)" <willy@...radead.org> Cc: linux-xfs@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-nvdimm@...ts.01.org, linux-kernel@...r.kernel.org, Christoph Hellwig <hch@....de> Subject: Re: [PATCH 3/9] iomap: Use kzalloc to allocate iomap_page On Mon, Aug 24, 2020 at 03:55:04PM +0100, Matthew Wilcox (Oracle) wrote: > 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@...radead.org> > Reviewed-by: Christoph Hellwig <hch@....de> Looks good to me, Reviewed-by: Darrick J. Wong <darrick.wong@...cle.com> --D > --- > 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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