From: Ma Wupeng <[email protected]>
Parameter flags is always zero in caller untrack_pfn() and
track_pfn_copy(). let's drop it.
Signed-off-by: Ma Wupeng <[email protected]>
---
arch/x86/mm/pat/memtype.c | 11 +++--------
1 file changed, 3 insertions(+), 8 deletions(-)
diff --git a/arch/x86/mm/pat/memtype.c b/arch/x86/mm/pat/memtype.c
index d8c37aaaf041..5b56f08f8ce6 100644
--- a/arch/x86/mm/pat/memtype.c
+++ b/arch/x86/mm/pat/memtype.c
@@ -950,8 +950,7 @@ static void free_pfn_range(u64 paddr, unsigned long size)
memtype_free(paddr, paddr + size);
}
-static int follow_phys(struct vm_area_struct *vma,
- unsigned long address, unsigned int flags,
+static int follow_phys(struct vm_area_struct *vma, unsigned long address,
unsigned long *prot, resource_size_t *phys)
{
int ret = -EINVAL;
@@ -965,14 +964,10 @@ static int follow_phys(struct vm_area_struct *vma,
goto out;
pte = ptep_get(ptep);
- if ((flags & FOLL_WRITE) && !pte_write(pte))
- goto unlock;
-
*prot = pgprot_val(pte_pgprot(pte));
*phys = (resource_size_t)pte_pfn(pte) << PAGE_SHIFT;
ret = 0;
-unlock:
pte_unmap_unlock(ptep, ptl);
out:
return ret;
@@ -997,7 +992,7 @@ int track_pfn_copy(struct vm_area_struct *vma)
* reserve the whole chunk covered by vma. We need the
* starting address and protection from pte.
*/
- if (follow_phys(vma, vma->vm_start, 0, &prot, &paddr)) {
+ if (follow_phys(vma, vma->vm_start, &prot, &paddr)) {
WARN_ON_ONCE(1);
return -EINVAL;
}
@@ -1084,7 +1079,7 @@ void untrack_pfn(struct vm_area_struct *vma, unsigned long pfn,
/* free the chunk starting from pfn or the whole chunk */
paddr = (resource_size_t)pfn << PAGE_SHIFT;
if (!paddr && !size) {
- if (follow_phys(vma, vma->vm_start, 0, &prot, &paddr)) {
+ if (follow_phys(vma, vma->vm_start, &prot, &paddr)) {
WARN_ON_ONCE(1);
return;
}
--
2.25.1