iomap: Use bitmap ops to set uptodate bits (b21866f5) · Commits · 戴 / test

Now that the bitmap is protected by a spinlock, we can use the more efficient bitmap ops instead of individual test/set bit ops. Signed-off-by:

fs/iomap/buffered-io.c

+2 −10

Original line number	Diff line number	Diff line
		@@ -134,19 +134,11 @@ iomap_iop_set_range_uptodate(struct page *page, unsigned off, unsigned len)
		struct inode *inode = page->mapping->host;
		unsigned first = off >> inode->i_blkbits;
		unsigned last = (off + len - 1) >> inode->i_blkbits;
		bool uptodate = true;
		unsigned long flags;
		unsigned int i;

		spin_lock_irqsave(&iop->uptodate_lock, flags);
		for (i = 0; i < i_blocks_per_page(inode, page); i++) {
		if (i >= first && i <= last)
		set_bit(i, iop->uptodate);
		else if (!test_bit(i, iop->uptodate))
		uptodate = false;
		}

		if (uptodate)
		bitmap_set(iop->uptodate, first, last - first + 1);
		if (bitmap_full(iop->uptodate, i_blocks_per_page(inode, page)))
		SetPageUptodate(page);
		spin_unlock_irqrestore(&iop->uptodate_lock, flags);
		}