From: "Matthew Wilcox (Oracle)" <willy@infradead.org> To: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>, "Darrick J . Wong" <darrick.wong@oracle.com>, linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org, Christoph Hellwig <hch@lst.de> Subject: [PATCH 3/9] iomap: Use kzalloc to allocate iomap_page Date: Mon, 24 Aug 2020 15:55:04 +0100 [thread overview] Message-ID: <20200824145511.10500-4-willy@infradead.org> (raw) In-Reply-To: <20200824145511.10500-1-willy@infradead.org> 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 _______________________________________________ Linux-nvdimm mailing list -- linux-nvdimm@lists.01.org To unsubscribe send an email to linux-nvdimm-leave@lists.01.org
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From: "Matthew Wilcox (Oracle)" <willy@infradead.org> To: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>, "Darrick J . Wong" <darrick.wong@oracle.com>, linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org, Christoph Hellwig <hch@lst.de> Subject: [PATCH 3/9] iomap: Use kzalloc to allocate iomap_page Date: Mon, 24 Aug 2020 15:55:04 +0100 [thread overview] Message-ID: <20200824145511.10500-4-willy@infradead.org> (raw) In-Reply-To: <20200824145511.10500-1-willy@infradead.org> 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
next prev parent reply other threads:[~2020-08-24 14:55 UTC|newest] Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-08-24 14:55 [PATCH 0/9] THP iomap patches for 5.10 Matthew Wilcox (Oracle) 2020-08-24 14:55 ` Matthew Wilcox (Oracle) 2020-08-24 14:55 ` [PATCH 1/9] iomap: Fix misplaced page flushing Matthew Wilcox (Oracle) 2020-08-24 14:55 ` Matthew Wilcox (Oracle) 2020-08-24 23:51 ` Dave Chinner 2020-08-24 23:51 ` Dave Chinner 2020-08-25 20:47 ` Darrick J. Wong 2020-08-25 20:47 ` Darrick J. Wong 2020-08-27 8:24 ` Christoph Hellwig 2020-08-27 8:24 ` Christoph Hellwig 2020-08-24 14:55 ` [PATCH 2/9] fs: Introduce i_blocks_per_page Matthew Wilcox (Oracle) 2020-08-24 14:55 ` Matthew Wilcox (Oracle) 2020-08-24 23:55 ` Dave Chinner 2020-08-24 23:55 ` Dave Chinner 2020-08-25 20:49 ` Darrick J. Wong 2020-08-25 20:49 ` Darrick J. Wong 2020-08-25 22:21 ` Dave Chinner 2020-08-25 22:21 ` Dave Chinner 2020-08-24 14:55 ` Matthew Wilcox (Oracle) [this message] 2020-08-24 14:55 ` [PATCH 3/9] iomap: Use kzalloc to allocate iomap_page Matthew Wilcox (Oracle) 2020-08-24 23:56 ` Dave Chinner 2020-08-24 23:56 ` Dave Chinner 2020-08-25 20:49 ` Darrick J. Wong 2020-08-25 20:49 ` Darrick J. Wong 2020-08-24 14:55 ` [PATCH 4/9] iomap: Use bitmap ops to set uptodate bits Matthew Wilcox (Oracle) 2020-08-24 14:55 ` Matthew Wilcox (Oracle) 2020-08-24 23:56 ` Dave Chinner 2020-08-24 23:56 ` Dave Chinner 2020-08-25 20:50 ` Darrick J. Wong 2020-08-25 20:50 ` Darrick J. Wong 2020-08-24 14:55 ` [PATCH 5/9] iomap: Support arbitrarily many blocks per page Matthew Wilcox (Oracle) 2020-08-24 14:55 ` Matthew Wilcox (Oracle) 2020-08-24 23:59 ` Dave Chinner 2020-08-24 23:59 ` Dave Chinner 2020-08-25 0:22 ` Matthew Wilcox 2020-08-25 0:22 ` Matthew Wilcox 2020-08-25 21:02 ` Darrick J. Wong 2020-08-25 21:02 ` Darrick J. Wong 2020-08-26 2:26 ` Matthew Wilcox 2020-08-26 2:26 ` Matthew Wilcox 2020-08-26 3:32 ` Darrick J. Wong 2020-08-26 3:32 ` Darrick J. Wong 2020-08-27 8:26 ` Christoph Hellwig 2020-08-27 8:26 ` Christoph Hellwig 2020-08-24 14:55 ` [PATCH 6/9] iomap: Convert read_count to byte count Matthew Wilcox (Oracle) 2020-08-24 14:55 ` Matthew Wilcox (Oracle) 2020-08-25 0:09 ` Dave Chinner 2020-08-25 0:09 ` Dave Chinner 2020-08-25 22:14 ` Darrick J. Wong 2020-08-25 22:14 ` Darrick J. Wong 2020-08-27 8:35 ` Christoph Hellwig 2020-08-27 8:35 ` Christoph Hellwig 2020-08-24 14:55 ` [PATCH 7/9] iomap: Convert write_count " Matthew Wilcox (Oracle) 2020-08-24 14:55 ` Matthew Wilcox (Oracle) 2020-08-27 8:36 ` Christoph Hellwig 2020-08-27 8:36 ` Christoph Hellwig 2020-08-24 14:55 ` [PATCH 8/9] iomap: Convert iomap_write_end types Matthew Wilcox (Oracle) 2020-08-24 14:55 ` Matthew Wilcox (Oracle) 2020-08-25 0:12 ` Dave Chinner 2020-08-25 0:12 ` Dave Chinner 2020-08-25 1:06 ` Matthew Wilcox 2020-08-25 1:06 ` Matthew Wilcox 2020-08-25 1:33 ` Dave Chinner 2020-08-25 1:33 ` Dave Chinner 2020-08-27 8:41 ` Christoph Hellwig 2020-08-27 8:41 ` Christoph Hellwig 2020-08-24 14:55 ` [PATCH 9/9] iomap: Change calling convention for zeroing Matthew Wilcox (Oracle) 2020-08-24 14:55 ` Matthew Wilcox (Oracle) 2020-08-25 0:27 ` Dave Chinner 2020-08-25 0:27 ` Dave Chinner 2020-08-25 3:26 ` Matthew Wilcox 2020-08-25 3:26 ` Matthew Wilcox 2020-08-25 3:35 ` Andreas Dilger 2020-08-25 4:27 ` Dave Chinner 2020-08-25 4:27 ` Dave Chinner 2020-08-25 12:40 ` Matthew Wilcox 2020-08-25 12:40 ` Matthew Wilcox 2020-08-25 22:05 ` Dave Chinner 2020-08-25 22:05 ` Dave Chinner 2020-08-25 22:23 ` Darrick J. Wong 2020-08-25 22:23 ` Darrick J. Wong 2020-08-27 8:39 ` Christoph Hellwig 2020-08-27 8:39 ` Christoph Hellwig
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