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| author | Jason Gunthorpe <[email protected]> | 2025-03-10 02:47:45 +0000 |
|---|---|---|
| committer | Joerg Roedel <[email protected]> | 2025-03-10 08:31:02 +0000 |
| commit | a8653e5cc2047b6a3354dc072a9f1ebaff157eaa (patch) | |
| tree | af23cd495d32b2e171d4fe4e48d3ebc596c869c8 /net/unix/unix_bpf.c | |
| parent | iommu/vt-d: Fix system hang on reboot -f (diff) | |
| download | kernel-a8653e5cc2047b6a3354dc072a9f1ebaff157eaa.tar.gz kernel-a8653e5cc2047b6a3354dc072a9f1ebaff157eaa.zip | |
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 <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lu Baolu <[email protected]>
Signed-off-by: Joerg Roedel <[email protected]>
Diffstat (limited to 'net/unix/unix_bpf.c')
0 files changed, 0 insertions, 0 deletions