From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f170.google.com (mail-pd0-f170.google.com [209.85.192.170]) by kanga.kvack.org (Postfix) with ESMTP id 979DD6B006E for ; Wed, 11 Feb 2015 12:12:22 -0500 (EST) Received: by pdjy10 with SMTP id y10so5524297pdj.13 for ; Wed, 11 Feb 2015 09:12:22 -0800 (PST) Received: from mga09.intel.com (mga09.intel.com. [134.134.136.24]) by mx.google.com with ESMTP id ry1si1662073pab.123.2015.02.11.09.12.19 for ; Wed, 11 Feb 2015 09:12:20 -0800 (PST) From: "Kirill A. Shutemov" Subject: [PATCH 1/4] mm: rename FOLL_MLOCK to FOLL_POPULATE Date: Wed, 11 Feb 2015 19:12:05 +0200 Message-Id: <1423674728-214192-2-git-send-email-kirill.shutemov@linux.intel.com> In-Reply-To: <1423674728-214192-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1423674728-214192-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Linus Torvalds , Michel Lespinasse , Rik van Riel , "Kirill A. Shutemov" After commit a1fde08c74e9 FOLL_MLOCK has lost its original meaning: we don't necessary 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 Cc: Linus Torvalds Cc: Michel Lespinasse --- include/linux/mm.h | 2 +- mm/gup.c | 6 +++--- mm/huge_memory.c | 2 +- mm/mlock.c | 2 +- 4 files changed, 6 insertions(+), 6 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index a09837f3f4b7..2dbf6f0f6e5b 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2110,7 +2110,7 @@ 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 e08e37ad050e..bc8d351026a9 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 73cf0987088c..7712d8ab6fe5 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 -- 2.1.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org