diff options
| author | Jason Gunthorpe <jgg@nvidia.com> | 2025-03-10 10:47:45 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2025-03-10 09:31:02 +0100 |
| commit | a8653e5cc2047b6a3354dc072a9f1ebaff157eaa (patch) | |
| tree | af23cd495d32b2e171d4fe4e48d3ebc596c869c8 /net/lapb/lapb_timer.c | |
| parent | 9ce7603ad3cbae64003087de57834e8c5c856a20 (diff) | |
iommu/vt-d: Use virt_to_phys()
If all the inlines are unwound virt_to_dma_pfn() is simply:
return page_to_pfn(virt_to_page(p)) << (PAGE_SHIFT - VTD_PAGE_SHIFT);
Which can be re-arranged to:
(page_to_pfn(virt_to_page(p)) << PAGE_SHIFT) >> VTD_PAGE_SHIFT
The only caller is:
((uint64_t)virt_to_dma_pfn(tmp_page) << VTD_PAGE_SHIFT)
re-arranged to:
((page_to_pfn(virt_to_page(tmp_page)) << PAGE_SHIFT) >> VTD_PAGE_SHIFT)
<< VTD_PAGE_SHIFT
Which simplifies to:
page_to_pfn(virt_to_page(tmp_page)) << PAGE_SHIFT
That is the same as virt_to_phys(tmp_page), so just remove all of this.
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/8-v3-e797f4dc6918+93057-iommu_pages_jgg@nvidia.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'net/lapb/lapb_timer.c')
0 files changed, 0 insertions, 0 deletions