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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2015-04-14 15:44:37 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-14 16:48:59 -0700
commit84d33df279e0380995b0e03fb8aad04cef2bc29f (patch)
tree05472b7380d74e7ff9d386a52cee4d6c8b87fea8
parentc21a6daf466a7bfa7bc2ac594837a1ce793a7960 (diff)
downloadlinux-84d33df279e0380995b0e03fb8aad04cef2bc29f.tar.bz2
mm: rename FOLL_MLOCK to FOLL_POPULATE
After commit a1fde08c74e9 ("VM: skip the stack guard page lookup in get_user_pages only for mlock") FOLL_MLOCK has lost its original meaning: we don't necessarily mlock the page if the flags is set -- we also take VM_LOCKED into consideration. Since we use the same codepath for __mm_populate(), let's rename FOLL_MLOCK to FOLL_POPULATE. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Acked-by: David Rientjes <rientjes@google.com> Cc: Michel Lespinasse <walken@google.com> Cc: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/mm.h2
-rw-r--r--mm/gup.c6
-rw-r--r--mm/huge_memory.c2
-rw-r--r--mm/mlock.c2
4 files changed, 6 insertions, 6 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 47a93928b90f..cccbbba12b9d 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2109,7 +2109,7 @@ static inline struct page *follow_page(struct vm_area_struct *vma,
#define FOLL_FORCE 0x10 /* get_user_pages read/write w/o permission */
#define FOLL_NOWAIT 0x20 /* if a disk transfer is needed, start the IO
* and return without waiting upon it */
-#define FOLL_MLOCK 0x40 /* mark page as mlocked */
+#define FOLL_POPULATE 0x40 /* fault in page */
#define FOLL_SPLIT 0x80 /* don't return transhuge pages, split them */
#define FOLL_HWPOISON 0x100 /* check page is hwpoisoned */
#define FOLL_NUMA 0x200 /* force NUMA hinting page fault */
diff --git a/mm/gup.c b/mm/gup.c
index a6e24e246f86..1b114ba9aebf 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -92,7 +92,7 @@ retry:
*/
mark_page_accessed(page);
}
- if ((flags & FOLL_MLOCK) && (vma->vm_flags & VM_LOCKED)) {
+ if ((flags & FOLL_POPULATE) && (vma->vm_flags & VM_LOCKED)) {
/*
* The preliminary mapping check is mainly to avoid the
* pointless overhead of lock_page on the ZERO_PAGE
@@ -265,8 +265,8 @@ static int faultin_page(struct task_struct *tsk, struct vm_area_struct *vma,
unsigned int fault_flags = 0;
int ret;
- /* For mlock, just skip the stack guard page. */
- if ((*flags & FOLL_MLOCK) &&
+ /* For mm_populate(), just skip the stack guard page. */
+ if ((*flags & FOLL_POPULATE) &&
(stack_guard_page_start(vma, address) ||
stack_guard_page_end(vma, address + PAGE_SIZE)))
return -ENOENT;
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 6817b0350c71..10a4b6cea0d1 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1231,7 +1231,7 @@ struct page *follow_trans_huge_pmd(struct vm_area_struct *vma,
pmd, _pmd, 1))
update_mmu_cache_pmd(vma, addr, pmd);
}
- if ((flags & FOLL_MLOCK) && (vma->vm_flags & VM_LOCKED)) {
+ if ((flags & FOLL_POPULATE) && (vma->vm_flags & VM_LOCKED)) {
if (page->mapping && trylock_page(page)) {
lru_add_drain();
if (page->mapping)
diff --git a/mm/mlock.c b/mm/mlock.c
index 8a54cd214925..f756e28b33fc 100644
--- a/mm/mlock.c
+++ b/mm/mlock.c
@@ -237,7 +237,7 @@ long __mlock_vma_pages_range(struct vm_area_struct *vma,
VM_BUG_ON_VMA(end > vma->vm_end, vma);
VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_sem), mm);
- gup_flags = FOLL_TOUCH | FOLL_MLOCK;
+ gup_flags = FOLL_TOUCH | FOLL_POPULATE;
/*
* We want to touch writable mappings with a write fault in order
* to break COW, except for shared mappings because these don't COW