| Message ID | 20190416182347.18441-2-hch@lst.de |
|---|---|
| State | Accepted |
| Delegated to: | David Miller |
| Headers | show |
| Series | [1/9] sparc/iommu: use !PageHighMem to check if a page has a kernel mapping | expand |
diff --git a/arch/sparc/mm/iommu.c b/arch/sparc/mm/iommu.c index e8d5d73ca40d..dcdadac03fdf 100644 --- a/arch/sparc/mm/iommu.c +++ b/arch/sparc/mm/iommu.c @@ -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);
This deobsfucates the check a bit, and prepares for future changes. Signed-off-by: Christoph Hellwig <hch@lst.de> Reported-by: Guenter Roeck <linux@roeck-us.net> --- arch/sparc/mm/iommu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)