iommu/vt-d: Remove unused dma_to_mm_pfn function

Remove dma_to_buf_pfn function, which is not used in the codebase.

This was pointed by clang with the following warning:

'dma_to_mm_pfn' [-Wunused-function]
static inline unsigned long dma_to_mm_pfn(unsigned long dma_pfn)
                            ^
https://lore.kernel.org/r/YYhY7GqlrcTZlzuA@fedora

drivers/iommu/intel/iommu.c:136:29: warning: unused function
Signed-off-by: Maíra Canal <maira.canal@usp.br>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20211217083817.1745419-4-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 261d931ee76ee8990d667018d44ef57323003c08..56671c7f4c0858603640618cb21e2752c096b9fc 100644 (file)
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -133,11 +133,6 @@ static inline unsigned long lvl_to_nr_pages(unsigned int lvl)
 
 /* VT-d pages must always be _smaller_ than MM pages. Otherwise things
    are never going to work. */
-static inline unsigned long dma_to_mm_pfn(unsigned long dma_pfn)
-{
-       return dma_pfn >> (PAGE_SHIFT - VTD_PAGE_SHIFT);
-}
-
 static inline unsigned long mm_to_dma_pfn(unsigned long mm_pfn)
 {
        return mm_pfn << (PAGE_SHIFT - VTD_PAGE_SHIFT);