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WSL2-Linux-Kernel
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mm: remove rest usage of VM_NONLINEAR and pte_file() 

One bit in ->vm_flags is unused now!

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Michal Hocko <mhocko@suse.cz>
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 14:10:04 -08:00 коммит произвёл Linus Torvalds
Родитель ac51b934f3
Коммит 0661a33611
13 изменённых файлов: 45 добавлений и 67 удалений
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3
drivers/gpu/drm/drm_vma_manager.c
Просмотреть файл

@ -50,8 +50,7 @@
*
* You must not use multiple offset managers on a single address_space.
* Otherwise, mm-core will be unable to tear down memory mappings as the VM will
* no longer be linear. Please use VM_NONLINEAR in that case and implement your
* own offset managers.
* no longer be linear.
*
* This offset manager works on page-based addresses. That is, every argument
* and return code (with the exception of drm_vma_node_offset_addr()) is given

1
include/linux/mm.h
Просмотреть файл

@ -138,7 +138,6 @@ extern unsigned int kobjsize(const void *objp);
#define VM_ACCOUNT 0x00100000 /* Is a VM accounted object */
#define VM_NORESERVE 0x00200000 /* should the VM suppress accounting */
#define VM_HUGETLB 0x00400000 /* Huge TLB Page VM */
#define VM_NONLINEAR 0x00800000 /* Is non-linear (remap_file_pages) */
#define VM_ARCH_1 0x01000000 /* Architecture-specific flag */
#define VM_ARCH_2 0x02000000
#define VM_DONTDUMP 0x04000000 /* Do not include in the core dump */

4
include/linux/swapops.h
Просмотреть файл

@ -54,7 +54,7 @@ static inline pgoff_t swp_offset(swp_entry_t entry)
/* check whether a pte points to a swap entry */
static inline int is_swap_pte(pte_t pte)
{
return !pte_none(pte) && !pte_present_nonuma(pte) && !pte_file(pte);
return !pte_none(pte) && !pte_present_nonuma(pte);
}
#endif
@ -66,7 +66,6 @@ static inline swp_entry_t pte_to_swp_entry(pte_t pte)
{
swp_entry_t arch_entry;
BUG_ON(pte_file(pte));
if (pte_swp_soft_dirty(pte))
pte = pte_swp_clear_soft_dirty(pte);
arch_entry = __pte_to_swp_entry(pte);
@ -82,7 +81,6 @@ static inline pte_t swp_entry_to_pte(swp_entry_t entry)
swp_entry_t arch_entry;
arch_entry = __swp_entry(swp_type(entry), swp_offset(entry));
BUG_ON(pte_file(__swp_entry_to_pte(arch_entry)));
return __swp_entry_to_pte(arch_entry);
}

1
mm/debug.c
Просмотреть файл

@ -130,7 +130,6 @@ static const struct trace_print_flags vmaflags_names[] = {
{VM_ACCOUNT, "account" },
{VM_NORESERVE, "noreserve" },
{VM_HUGETLB, "hugetlb" },
{VM_NONLINEAR, "nonlinear" },
#if defined(CONFIG_X86)
{VM_PAT, "pat" },
#elif defined(CONFIG_PPC)

2
mm/gup.c
Просмотреть файл

@ -55,7 +55,7 @@ retry:
*/
if (likely(!(flags & FOLL_MIGRATION)))
goto no_page;
if (pte_none(pte) || pte_file(pte))
if (pte_none(pte))
goto no_page;
entry = pte_to_swp_entry(pte);
if (!is_migration_entry(entry))

2
mm/ksm.c
Просмотреть файл

@ -1748,7 +1748,7 @@ int ksm_madvise(struct vm_area_struct *vma, unsigned long start,
*/
if (*vm_flags & (VM_MERGEABLE | VM_SHARED | VM_MAYSHARE |
VM_PFNMAP | VM_IO | VM_DONTEXPAND |
VM_HUGETLB | VM_NONLINEAR | VM_MIXEDMAP))
VM_HUGETLB | VM_MIXEDMAP))
return 0; /* just ignore the advice */
#ifdef VM_SAO

4
mm/madvise.c
Просмотреть файл

@ -155,7 +155,7 @@ static int swapin_walk_pmd_entry(pmd_t *pmd, unsigned long start,
pte = *(orig_pte + ((index - start) / PAGE_SIZE));
pte_unmap_unlock(orig_pte, ptl);
if (pte_present(pte) || pte_none(pte) || pte_file(pte))
if (pte_present(pte) || pte_none(pte))
continue;
entry = pte_to_swp_entry(pte);
if (unlikely(non_swap_entry(entry)))
@ -296,7 +296,7 @@ static long madvise_remove(struct vm_area_struct *vma,
*prev = NULL; /* tell sys_madvise we drop mmap_sem */
if (vma->vm_flags & (VM_LOCKED|VM_NONLINEAR|VM_HUGETLB))
if (vma->vm_flags & (VM_LOCKED | VM_HUGETLB))
return -EINVAL;
f = vma->vm_file;

7
mm/memcontrol.c
Просмотреть файл

@ -4926,10 +4926,7 @@ static struct page *mc_handle_file_pte(struct vm_area_struct *vma,
return NULL;
mapping = vma->vm_file->f_mapping;
if (pte_none(ptent))
pgoff = linear_page_index(vma, addr);
else /* pte_file(ptent) is true */
pgoff = pte_to_pgoff(ptent);
pgoff = linear_page_index(vma, addr);
/* page is moved even if it's not RSS of this task(page-faulted). */
#ifdef CONFIG_SWAP
@ -4961,7 +4958,7 @@ static enum mc_target_type get_mctgt_type(struct vm_area_struct *vma,
page = mc_handle_present_pte(vma, addr, ptent);
else if (is_swap_pte(ptent))
page = mc_handle_swap_pte(vma, addr, ptent, &ent);
else if (pte_none(ptent) || pte_file(ptent))
else if (pte_none(ptent))
page = mc_handle_file_pte(vma, addr, ptent, &ent);
if (!page && !ent.val)

70
mm/memory.c
Просмотреть файл

@ -811,42 +811,40 @@ copy_one_pte(struct mm_struct *dst_mm, struct mm_struct *src_mm,
/* pte contains position in swap or file, so copy. */
if (unlikely(!pte_present(pte))) {
if (!pte_file(pte)) {
swp_entry_t entry = pte_to_swp_entry(pte);
swp_entry_t entry = pte_to_swp_entry(pte);
if (likely(!non_swap_entry(entry))) {
if (swap_duplicate(entry) < 0)
return entry.val;
if (likely(!non_swap_entry(entry))) {
if (swap_duplicate(entry) < 0)
return entry.val;
/* make sure dst_mm is on swapoff's mmlist. */
if (unlikely(list_empty(&dst_mm->mmlist))) {
spin_lock(&mmlist_lock);
if (list_empty(&dst_mm->mmlist))
list_add(&dst_mm->mmlist,
&src_mm->mmlist);
spin_unlock(&mmlist_lock);
}
rss[MM_SWAPENTS]++;
} else if (is_migration_entry(entry)) {
page = migration_entry_to_page(entry);
/* make sure dst_mm is on swapoff's mmlist. */
if (unlikely(list_empty(&dst_mm->mmlist))) {
spin_lock(&mmlist_lock);
if (list_empty(&dst_mm->mmlist))
list_add(&dst_mm->mmlist,
&src_mm->mmlist);
spin_unlock(&mmlist_lock);
}
rss[MM_SWAPENTS]++;
} else if (is_migration_entry(entry)) {
page = migration_entry_to_page(entry);
if (PageAnon(page))
rss[MM_ANONPAGES]++;
else
rss[MM_FILEPAGES]++;
if (PageAnon(page))
rss[MM_ANONPAGES]++;
else
rss[MM_FILEPAGES]++;
if (is_write_migration_entry(entry) &&
is_cow_mapping(vm_flags)) {
/*
* COW mappings require pages in both
* parent and child to be set to read.
*/
make_migration_entry_read(&entry);
pte = swp_entry_to_pte(entry);
if (pte_swp_soft_dirty(*src_pte))
pte = pte_swp_mksoft_dirty(pte);
set_pte_at(src_mm, addr, src_pte, pte);
}
if (is_write_migration_entry(entry) &&
is_cow_mapping(vm_flags)) {
/*
* COW mappings require pages in both
* parent and child to be set to read.
*/
make_migration_entry_read(&entry);
pte = swp_entry_to_pte(entry);
if (pte_swp_soft_dirty(*src_pte))
pte = pte_swp_mksoft_dirty(pte);
set_pte_at(src_mm, addr, src_pte, pte);
}
}
goto out_set_pte;
@ -1020,11 +1018,9 @@ int copy_page_range(struct mm_struct *dst_mm, struct mm_struct *src_mm,
* readonly mappings. The tradeoff is that copy_page_range is more
* efficient than faulting.
*/
if (!(vma->vm_flags & (VM_HUGETLB | VM_NONLINEAR |
VM_PFNMAP | VM_MIXEDMAP))) {
if (!vma->anon_vma)
return 0;
}
if (!(vma->vm_flags & (VM_HUGETLB | VM_PFNMAP | VM_MIXEDMAP)) &&
!vma->anon_vma)
return 0;
if (is_vm_hugetlb_page(vma))
return copy_hugetlb_page_range(dst_mm, src_mm, vma);

9
mm/mincore.c
Просмотреть файл

@ -124,17 +124,13 @@ static void mincore_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
ptep = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
do {
pte_t pte = *ptep;
pgoff_t pgoff;
next = addr + PAGE_SIZE;
if (pte_none(pte))
mincore_unmapped_range(vma, addr, next, vec);
else if (pte_present(pte))
*vec = 1;
else if (pte_file(pte)) {
pgoff = pte_to_pgoff(pte);
*vec = mincore_page(vma->vm_file->f_mapping, pgoff);
} else { /* pte is a swap entry */
else { /* pte is a swap entry */
swp_entry_t entry = pte_to_swp_entry(pte);
if (non_swap_entry(entry)) {
@ -145,9 +141,8 @@ static void mincore_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
*vec = 1;
} else {
#ifdef CONFIG_SWAP
pgoff = entry.val;
*vec = mincore_page(swap_address_space(entry),
pgoff);
entry.val);
#else
WARN_ON(1);
*vec = 1;

2
mm/mprotect.c
Просмотреть файл

@ -105,7 +105,7 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
}
if (updated)
pages++;
} else if (IS_ENABLED(CONFIG_MIGRATION) && !pte_file(oldpte)) {
} else if (IS_ENABLED(CONFIG_MIGRATION)) {
swp_entry_t entry = pte_to_swp_entry(oldpte);
if (is_write_migration_entry(entry)) {

2
mm/mremap.c
Просмотреть файл

@ -81,8 +81,6 @@ static pte_t move_soft_dirty_pte(pte_t pte)
pte = pte_mksoft_dirty(pte);
else if (is_swap_pte(pte))
pte = pte_swp_mksoft_dirty(pte);
else if (pte_file(pte))
pte = pte_file_mksoft_dirty(pte);
#endif
return pte;
}

5
mm/msync.c
Просмотреть файл

@ -86,10 +86,7 @@ SYSCALL_DEFINE3(msync, unsigned long, start, size_t, len, int, flags)
(vma->vm_flags & VM_SHARED)) {
get_file(file);
up_read(&mm->mmap_sem);
if (vma->vm_flags & VM_NONLINEAR)
error = vfs_fsync(file, 1);
else
error = vfs_fsync_range(file, fstart, fend, 1);
error = vfs_fsync_range(file, fstart, fend, 1);
fput(file);
if (error || start >= end)
goto out;