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arm64: hugetlb: remove spurious calls to huge_ptep_offset() 

We don't need to call huge_ptep_offset as our accessors are already
supplied with the pte_t *.  This patch removes those spurious calls.

[punit.agrawal@arm.com: resolve rebase conflicts due to patch re-ordering]
Link: http://lkml.kernel.org/r/20170524115409.31309-3-punit.agrawal@arm.com
Signed-off-by: Steve Capper <steve.capper@arm.com>
Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
Cc: David Woods <dwoods@mellanox.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Steve Capper 2017-07-06 15:39:33 -07:00 committed by Linus Torvalds
parent bb9dd3df8e
commit f0b38d65c9
1 changed files with 14 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
arch/arm64/mm/hugetlbpage.c
View File

@ -183,21 +183,19 @@ pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
if (pte_cont(*ptep)) {
int ncontig, i;
size_t pgsize;
pte_t *cpte;
bool is_dirty = false;
cpte = huge_pte_offset(mm, addr);
ncontig = find_num_contig(mm, addr, cpte, &pgsize);
ncontig = find_num_contig(mm, addr, ptep, &pgsize);
/* save the 1st pte to return */
pte = ptep_get_and_clear(mm, addr, cpte);
pte = ptep_get_and_clear(mm, addr, ptep);
for (i = 1, addr += pgsize; i < ncontig; ++i, addr += pgsize) {
/*
* If HW_AFDBM is enabled, then the HW could
* turn on the dirty bit for any of the page
* in the set, so check them all.
*/
++cpte;
if (pte_dirty(ptep_get_and_clear(mm, addr, cpte)))
++ptep;
if (pte_dirty(ptep_get_and_clear(mm, addr, ptep)))
is_dirty = true;
}
if (is_dirty)
@ -213,8 +211,6 @@ int huge_ptep_set_access_flags(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep,
pte_t pte, int dirty)
{
pte_t *cpte;
if (pte_cont(pte)) {
int ncontig, i, changed = 0;
size_t pgsize = 0;
@ -224,12 +220,11 @@ int huge_ptep_set_access_flags(struct vm_area_struct *vma,
__pgprot(pte_val(pfn_pte(pfn, __pgprot(0))) ^
pte_val(pte));
cpte = huge_pte_offset(vma->vm_mm, addr);
pfn = pte_pfn(*cpte);
ncontig = find_num_contig(vma->vm_mm, addr, cpte,
pfn = pte_pfn(pte);
ncontig = find_num_contig(vma->vm_mm, addr, ptep,
&pgsize);
for (i = 0; i < ncontig; ++i, ++cpte, addr += pgsize) {
changed |= ptep_set_access_flags(vma, addr, cpte,
for (i = 0; i < ncontig; ++i, ++ptep, addr += pgsize) {
changed |= ptep_set_access_flags(vma, addr, ptep,
pfn_pte(pfn,
hugeprot),
dirty);
@ -246,13 +241,11 @@ void huge_ptep_set_wrprotect(struct mm_struct *mm,
{
if (pte_cont(*ptep)) {
int ncontig, i;
pte_t *cpte;
size_t pgsize = 0;
cpte = huge_pte_offset(mm, addr);
ncontig = find_num_contig(mm, addr, cpte, &pgsize);
for (i = 0; i < ncontig; ++i, ++cpte, addr += pgsize)
ptep_set_wrprotect(mm, addr, cpte);
ncontig = find_num_contig(mm, addr, ptep, &pgsize);
for (i = 0; i < ncontig; ++i, ++ptep, addr += pgsize)
ptep_set_wrprotect(mm, addr, ptep);
} else {
ptep_set_wrprotect(mm, addr, ptep);
}
@ -263,14 +256,12 @@ void huge_ptep_clear_flush(struct vm_area_struct *vma,
{
if (pte_cont(*ptep)) {
int ncontig, i;
pte_t *cpte;
size_t pgsize = 0;
cpte = huge_pte_offset(vma->vm_mm, addr);
ncontig = find_num_contig(vma->vm_mm, addr, cpte,
ncontig = find_num_contig(vma->vm_mm, addr, ptep,
&pgsize);
for (i = 0; i < ncontig; ++i, ++cpte, addr += pgsize)
ptep_clear_flush(vma, addr, cpte);
for (i = 0; i < ncontig; ++i, ++ptep, addr += pgsize)
ptep_clear_flush(vma, addr, ptep);
} else {
ptep_clear_flush(vma, addr, ptep);
}