diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2015-04-14 15:44:37 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-14 16:48:59 -0700 |
| commit | 84d33df279e0380995b0e03fb8aad04cef2bc29f (patch) | |
| tree | 05472b7380d74e7ff9d386a52cee4d6c8b87fea8 | |
| parent | c21a6daf466a7bfa7bc2ac594837a1ce793a7960 (diff) | |
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.h | 2 | ||||
| -rw-r--r-- | mm/gup.c | 6 | ||||
| -rw-r--r-- | mm/huge_memory.c | 2 | ||||
| -rw-r--r-- | mm/mlock.c | 2 |
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 */ @@ -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 |