sparc/iommu: use !PageHighMem to check if a page has a kernel mapping (031abf0b) · Commits · 戴 / test

This deobsfucates the check a bit, and prepares for future changes. Signed-off-by:

arch/sparc/mm/iommu.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -273,7 +273,8 @@ static int sbus_iommu_map_sg_pflush(struct device dev, struct scatterlist sgl,
		* XXX Is this a good assumption?
		* XXX What if someone else unmaps it here and races us?
		*/
		if ((page = (unsigned long) page_address(sg_page(sg))) != 0) {
		if (!PageHighMem(sg_page(sg))) {
		page = (unsigned long)page_address(sg_page(sg));
		for (i = 0; i < n; i++) {
		if (page != oldpage) { /* Already flushed? */
		flush_page_for_dma(page);