From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753454AbeDQOeL (ORCPT ); Tue, 17 Apr 2018 10:34:11 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:50776 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753324AbeDQOeJ (ORCPT ); Tue, 17 Apr 2018 10:34:09 -0400 From: Laurent Dufour To: akpm@linux-foundation.org, mhocko@kernel.org, peterz@infradead.org, kirill@shutemov.name, ak@linux.intel.com, dave@stgolabs.net, jack@suse.cz, Matthew Wilcox , benh@kernel.crashing.org, mpe@ellerman.id.au, paulus@samba.org, Thomas Gleixner , Ingo Molnar , hpa@zytor.com, Will Deacon , Sergey Senozhatsky , Andrea Arcangeli , Alexei Starovoitov , kemi.wang@intel.com, sergey.senozhatsky.work@gmail.com, Daniel Jordan , David Rientjes , Jerome Glisse , Ganesh Mahendran Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, haren@linux.vnet.ibm.com, khandual@linux.vnet.ibm.com, npiggin@gmail.com, bsingharora@gmail.com, paulmck@linux.vnet.ibm.com, Tim Chen , linuxppc-dev@lists.ozlabs.org, x86@kernel.org Subject: [PATCH v10 07/25] mm: introduce INIT_VMA() Date: Tue, 17 Apr 2018 16:33:13 +0200 X-Mailer: git-send-email 2.7.4 In-Reply-To: <1523975611-15978-1-git-send-email-ldufour@linux.vnet.ibm.com> References: <1523975611-15978-1-git-send-email-ldufour@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18041714-0020-0000-0000-00000412EC67 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18041714-0021-0000-0000-000042A72CF1 Message-Id: <1523975611-15978-8-git-send-email-ldufour@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-04-17_07:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=2 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1804170131 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Some VMA struct fields need to be initialized once the VMA structure is allocated. Currently this only concerns anon_vma_chain field but some other will be added to support the speculative page fault. Instead of spreading the initialization calls all over the code, let's introduce a dedicated inline function. Signed-off-by: Laurent Dufour --- fs/exec.c | 2 +- include/linux/mm.h | 5 +++++ kernel/fork.c | 2 +- mm/mmap.c | 10 +++++----- mm/nommu.c | 2 +- 5 files changed, 13 insertions(+), 8 deletions(-) diff --git a/fs/exec.c b/fs/exec.c index 32eea4c65909..bd03689aa358 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -311,7 +311,7 @@ static int __bprm_mm_init(struct linux_binprm *bprm) vma->vm_start = vma->vm_end - PAGE_SIZE; vma->vm_flags = VM_SOFTDIRTY | VM_STACK_FLAGS | VM_STACK_INCOMPLETE_SETUP; vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); - INIT_LIST_HEAD(&vma->anon_vma_chain); + INIT_VMA(vma); err = insert_vm_struct(mm, vma); if (err) diff --git a/include/linux/mm.h b/include/linux/mm.h index 714da99d77a3..efc1248b82bd 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1261,6 +1261,11 @@ struct zap_details { pgoff_t last_index; /* Highest page->index to unmap */ }; +static inline void INIT_VMA(struct vm_area_struct *vma) +{ + INIT_LIST_HEAD(&vma->anon_vma_chain); +} + struct page *_vm_normal_page(struct vm_area_struct *vma, unsigned long addr, pte_t pte, bool with_public_device); #define vm_normal_page(vma, addr, pte) _vm_normal_page(vma, addr, pte, false) diff --git a/kernel/fork.c b/kernel/fork.c index b1d877f1a0ac..d937e5945f77 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -451,7 +451,7 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm, if (!tmp) goto fail_nomem; *tmp = *mpnt; - INIT_LIST_HEAD(&tmp->anon_vma_chain); + INIT_VMA(tmp); retval = vma_dup_policy(mpnt, tmp); if (retval) goto fail_nomem_policy; diff --git a/mm/mmap.c b/mm/mmap.c index 188f195883b9..8bd9ae1dfacc 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1700,7 +1700,7 @@ unsigned long mmap_region(struct file *file, unsigned long addr, vma->vm_flags = vm_flags; vma->vm_page_prot = vm_get_page_prot(vm_flags); vma->vm_pgoff = pgoff; - INIT_LIST_HEAD(&vma->anon_vma_chain); + INIT_VMA(vma); if (file) { if (vm_flags & VM_DENYWRITE) { @@ -2586,7 +2586,7 @@ int __split_vma(struct mm_struct *mm, struct vm_area_struct *vma, /* most fields are the same, copy all, and then fixup */ *new = *vma; - INIT_LIST_HEAD(&new->anon_vma_chain); + INIT_VMA(new); if (new_below) new->vm_end = addr; @@ -2956,7 +2956,7 @@ static int do_brk_flags(unsigned long addr, unsigned long request, unsigned long return -ENOMEM; } - INIT_LIST_HEAD(&vma->anon_vma_chain); + INIT_VMA(vma); vma->vm_mm = mm; vma->vm_start = addr; vma->vm_end = addr + len; @@ -3167,7 +3167,7 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap, new_vma->vm_pgoff = pgoff; if (vma_dup_policy(vma, new_vma)) goto out_free_vma; - INIT_LIST_HEAD(&new_vma->anon_vma_chain); + INIT_VMA(new_vma); if (anon_vma_clone(new_vma, vma)) goto out_free_mempol; if (new_vma->vm_file) @@ -3310,7 +3310,7 @@ static struct vm_area_struct *__install_special_mapping( if (unlikely(vma == NULL)) return ERR_PTR(-ENOMEM); - INIT_LIST_HEAD(&vma->anon_vma_chain); + INIT_VMA(vma); vma->vm_mm = mm; vma->vm_start = addr; vma->vm_end = addr + len; diff --git a/mm/nommu.c b/mm/nommu.c index 13723736d38f..6909ea0bf88d 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -1212,7 +1212,7 @@ unsigned long do_mmap(struct file *file, region->vm_flags = vm_flags; region->vm_pgoff = pgoff; - INIT_LIST_HEAD(&vma->anon_vma_chain); + INIT_VMA(vma); vma->vm_flags = vm_flags; vma->vm_pgoff = pgoff; -- 2.7.4