x86: PAT: fix address types in track_pfn_vma_new()

Impact: cleanup, fix warning

This warning:

 arch/x86/mm/pat.c: In function track_pfn_vma_copy:
 arch/x86/mm/pat.c:701: warning: passing argument 5 of follow_phys from incompatible pointer type

Triggers because physical addresses are resource_size_t, not u64.

This really matters when calling an interface like follow_phys() which
takes a pointer to a physical address -- although on x86, being
littleendian, it would generally work anyway as long as the memory region
wasn't completely uninitialized.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 8 insertions, 8 deletions

diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index 541bcc944a5b..85cbd3cd3723 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -684,7 +684,7 @@ int track_pfn_vma_copy(struct vm_area_struct *vma)
 {
         int retval = 0;
         unsigned long i, j;
-        u64 paddr;
+        resource_size_t paddr;
         unsigned long prot;
         unsigned long vma_start = vma->vm_start;
         unsigned long vma_end = vma->vm_end;
@@ -746,8 +746,8 @@ int track_pfn_vma_new(struct vm_area_struct *vma, pgprot_t prot,
 {
         int retval = 0;
         unsigned long i, j;
-        u64 base_paddr;
-        u64 paddr;
+        resource_size_t base_paddr;
+        resource_size_t paddr;
         unsigned long vma_start = vma->vm_start;
         unsigned long vma_end = vma->vm_end;
         unsigned long vma_size = vma_end - vma_start;
@@ -757,12 +757,12 @@ int track_pfn_vma_new(struct vm_area_struct *vma, pgprot_t prot,
 
         if (is_linear_pfn_mapping(vma)) {
                 /* reserve the whole chunk starting from vm_pgoff */
-                paddr = (u64)vma->vm_pgoff << PAGE_SHIFT;
+                paddr = (resource_size_t)vma->vm_pgoff << PAGE_SHIFT;
                 return reserve_pfn_range(paddr, vma_size, prot);
         }
 
         /* reserve page by page using pfn and size */
-        base_paddr = (u64)pfn << PAGE_SHIFT;
+        base_paddr = (resource_size_t)pfn << PAGE_SHIFT;
         for (i = 0; i < size; i += PAGE_SIZE) {
                 paddr = base_paddr + i;
                 retval = reserve_pfn_range(paddr, PAGE_SIZE, prot);
@@ -790,7 +790,7 @@ void untrack_pfn_vma(struct vm_area_struct *vma, unsigned long pfn,
                         unsigned long size)
 {
         unsigned long i;
-        u64 paddr;
+        resource_size_t paddr;
         unsigned long prot;
         unsigned long vma_start = vma->vm_start;
         unsigned long vma_end = vma->vm_end;
@@ -801,14 +801,14 @@ void untrack_pfn_vma(struct vm_area_struct *vma, unsigned long pfn,
 
         if (is_linear_pfn_mapping(vma)) {
                 /* free the whole chunk starting from vm_pgoff */
-                paddr = (u64)vma->vm_pgoff << PAGE_SHIFT;
+                paddr = (resource_size_t)vma->vm_pgoff << PAGE_SHIFT;
                 free_pfn_range(paddr, vma_size);
                 return;
         }
 
         if (size != 0 && size != vma_size) {
                 /* free page by page, using pfn and size */
-                paddr = (u64)pfn << PAGE_SHIFT;
+                paddr = (resource_size_t)pfn << PAGE_SHIFT;
                 for (i = 0; i < size; i += PAGE_SIZE) {
                         paddr = paddr + i;
                         free_pfn_range(paddr, PAGE_SIZE);