diff options
| author | Christoph Hellwig <hch@lst.de> | 2019-04-16 21:23:39 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-05-09 03:11:56 +0300 |
| commit | 031abf0b70cb6804eefb11340463a2277e52f853 (patch) | |
| tree | 701b0464c323d5f44fd2f146ebb94deb67b85e9b /arch/sparc | |
| parent | 269fe56551c68cde57e477a6810ed57921dfe54f (diff) | |
| download | linux-031abf0b70cb6804eefb11340463a2277e52f853.tar.xz | |
sparc/iommu: use !PageHighMem to check if a page has a kernel mapping
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>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc')
| -rw-r--r-- | arch/sparc/mm/iommu.c | 3 |
1 files changed, 2 insertions, 1 deletions
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); |