3.16.59-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
commit 1da4b35b001481df99a6dcab12d5d39a876f7056 upstream.
We have to handle non-linear mappings for /proc/PID/{smaps,clear_refs}
which is unused now. Let's drop it.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
[bwh: Backported to 3.16:
- Deleted code is slightly different
- Adjust context]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -436,7 +436,6 @@ struct mem_size_stats {
unsigned long anonymous;
unsigned long anonymous_thp;
unsigned long swap;
- unsigned long nonlinear;
u64 pss;
};
@@ -446,7 +445,6 @@ static void smaps_pte_entry(pte_t ptent,
{
struct mem_size_stats *mss = walk->private;
struct vm_area_struct *vma = mss->vma;
- pgoff_t pgoff = linear_page_index(vma, addr);
struct page *page = NULL;
int mapcount;
@@ -459,9 +457,6 @@ static void smaps_pte_entry(pte_t ptent,
mss->swap += ptent_size;
else if (is_migration_entry(swpent))
page = migration_entry_to_page(swpent);
- } else if (pte_file(ptent)) {
- if (pte_to_pgoff(ptent) != pgoff)
- mss->nonlinear += ptent_size;
}
if (!page)
@@ -470,9 +465,6 @@ static void smaps_pte_entry(pte_t ptent,
if (PageAnon(page))
mss->anonymous += ptent_size;
- if (page->index != pgoff)
- mss->nonlinear += ptent_size;
-
mss->resident += ptent_size;
/* Accumulate the size in pages that have been accessed. */
if (pte_young(ptent) || PageReferenced(page))
@@ -554,7 +546,6 @@ static void show_smap_vma_flags(struct s
[ilog2(VM_ACCOUNT)] = "ac",
[ilog2(VM_NORESERVE)] = "nr",
[ilog2(VM_HUGETLB)] = "ht",
- [ilog2(VM_NONLINEAR)] = "nl",
[ilog2(VM_ARCH_1)] = "ar",
[ilog2(VM_DONTDUMP)] = "dd",
#ifdef CONFIG_MEM_SOFT_DIRTY
@@ -628,10 +619,6 @@ static int show_smap(struct seq_file *m,
(vma->vm_flags & VM_LOCKED) ?
(unsigned long)(mss.pss >> (10 + PSS_SHIFT)) : 0);
- if (vma->vm_flags & VM_NONLINEAR)
- seq_printf(m, "Nonlinear: %8lu kB\n",
- mss.nonlinear >> 10);
-
show_smap_vma_flags(m, vma);
if (m->count < m->size) /* vma is copied successfully */
@@ -735,8 +722,6 @@ static inline void clear_soft_dirty(stru
ptent = pte_clear_flags(ptent, _PAGE_SOFT_DIRTY);
} else if (is_swap_pte(ptent)) {
ptent = pte_swp_clear_soft_dirty(ptent);
- } else if (pte_file(ptent)) {
- ptent = pte_file_clear_soft_dirty(ptent);
}
set_pte_at(vma->vm_mm, addr, pte, ptent);
