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proc: drop handling non-linear mappings

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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@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kirill A. Shutemov 2015-02-10 14:09:57 -08:00 committed by Linus Torvalds
parent d83a08db5b
commit 1da4b35b00
1 changed files with 0 additions and 16 deletions
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16
fs/proc/task_mmu.c
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@ -443,7 +443,6 @@ struct mem_size_stats {
unsigned long anonymous;
unsigned long anonymous_thp;
unsigned long swap;
unsigned long nonlinear;
u64 pss;
};
@ -484,7 +483,6 @@ static void smaps_pte_entry(pte_t *pte, unsigned long addr,
{
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;
if (pte_present(*pte)) {
@ -496,17 +494,10 @@ static void smaps_pte_entry(pte_t *pte, unsigned long addr,
mss->swap += PAGE_SIZE;
else if (is_migration_entry(swpent))
page = migration_entry_to_page(swpent);
} else if (pte_file(*pte)) {
if (pte_to_pgoff(*pte) != pgoff)
mss->nonlinear += PAGE_SIZE;
}
if (!page)
return;
if (page->index != pgoff)
mss->nonlinear += PAGE_SIZE;
smaps_account(mss, page, PAGE_SIZE, pte_young(*pte), pte_dirty(*pte));
}
@ -596,7 +587,6 @@ static void show_smap_vma_flags(struct seq_file *m, struct vm_area_struct *vma)
[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
@ -668,10 +658,6 @@ static int show_smap(struct seq_file *m, void *v, int is_pid)
(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);
m_cache_vma(m, vma);
return 0;
@ -772,8 +758,6 @@ static inline void clear_soft_dirty(struct vm_area_struct *vma,
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);