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[209.132.183.28]) by mx.google.com with ESMTPS id 27si2292111qvx.58.2019.04.18.15.22.20 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 18 Apr 2019 15:22:20 -0700 (PDT) Received-SPF: pass (google.com: domain of jglisse@redhat.com designates 209.132.183.28 as permitted sender) client-ip=209.132.183.28; Authentication-Results: mx.google.com; spf=pass (google.com: domain of jglisse@redhat.com designates 209.132.183.28 as permitted sender) smtp.mailfrom=jglisse@redhat.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 05FE4C066462; Thu, 18 Apr 2019 22:22:19 +0000 (UTC) Received: from redhat.com (unknown [10.20.6.236]) by smtp.corp.redhat.com (Postfix) with ESMTPS id ED5475D9CC; Thu, 18 Apr 2019 22:22:14 +0000 (UTC) Date: Thu, 18 Apr 2019 18:22:13 -0400 From: Jerome Glisse To: Laurent Dufour Cc: 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 , aneesh.kumar@linux.ibm.com, benh@kernel.crashing.org, mpe@ellerman.id.au, paulus@samba.org, Thomas Gleixner , Ingo Molnar , hpa@zytor.com, Will Deacon , Sergey Senozhatsky , sergey.senozhatsky.work@gmail.com, Andrea Arcangeli , Alexei Starovoitov , kemi.wang@intel.com, Daniel Jordan , David Rientjes , Ganesh Mahendran , Minchan Kim , Punit Agrawal , vinayak menon , Yang Shi , zhong jiang , Haiyan Song , Balbir Singh , sj38.park@gmail.com, Michel Lespinasse , Mike Rapoport , linux-kernel@vger.kernel.org, linux-mm@kvack.org, haren@linux.vnet.ibm.com, npiggin@gmail.com, paulmck@linux.vnet.ibm.com, Tim Chen , linuxppc-dev@lists.ozlabs.org, x86@kernel.org Subject: Re: [PATCH v12 08/31] mm: introduce INIT_VMA() Message-ID: <20190418222212.GH11645@redhat.com> References: <20190416134522.17540-1-ldufour@linux.ibm.com> <20190416134522.17540-9-ldufour@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190416134522.17540-9-ldufour@linux.ibm.com> User-Agent: Mutt/1.11.3 (2019-02-01) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Thu, 18 Apr 2019 22:22:19 +0000 (UTC) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Apr 16, 2019 at 03:44:59PM +0200, Laurent Dufour wrote: > 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 | 1 + > include/linux/mm.h | 5 +++++ > kernel/fork.c | 2 +- > mm/mmap.c | 3 +++ > mm/nommu.c | 1 + > 5 files changed, 11 insertions(+), 1 deletion(-) > > diff --git a/fs/exec.c b/fs/exec.c > index 2e0033348d8e..9762e060295c 100644 > --- a/fs/exec.c > +++ b/fs/exec.c > @@ -266,6 +266,7 @@ 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_VMA(vma); > > err = insert_vm_struct(mm, vma); > if (err) > diff --git a/include/linux/mm.h b/include/linux/mm.h > index 4ba2f53f9d60..2ceb1d2869a6 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -1407,6 +1407,11 @@ struct zap_details { > pgoff_t last_index; /* Highest page->index to unmap */ > }; > > +static inline void INIT_VMA(struct vm_area_struct *vma) Can we leave capital names for macro ? Also i prefer vma_init_struct() (the one thing i like in C++ is namespace and thus i like namespace_action() for function name). Also why not doing a coccinelle patch for this: @@ struct vm_area_struct *vma; @@ -INIT_LIST_HEAD(&vma->anon_vma_chain); +vma_init_struct(vma); Untested ... > +{ > + 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 915be4918a2b..f8dae021c2e5 100644 > --- a/kernel/fork.c > +++ b/kernel/fork.c > @@ -341,7 +341,7 @@ struct vm_area_struct *vm_area_dup(struct vm_area_struct *orig) > > if (new) { > *new = *orig; > - INIT_LIST_HEAD(&new->anon_vma_chain); > + INIT_VMA(new); > } > return new; > } > diff --git a/mm/mmap.c b/mm/mmap.c > index bd7b9f293b39..5ad3a3228d76 100644 > --- a/mm/mmap.c > +++ b/mm/mmap.c > @@ -1765,6 +1765,7 @@ 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_VMA(vma); > > if (file) { > if (vm_flags & VM_DENYWRITE) { > @@ -3037,6 +3038,7 @@ static int do_brk_flags(unsigned long addr, unsigned long len, unsigned long fla > } > > vma_set_anonymous(vma); > + INIT_VMA(vma); > vma->vm_start = addr; > vma->vm_end = addr + len; > vma->vm_pgoff = pgoff; > @@ -3395,6 +3397,7 @@ static struct vm_area_struct *__install_special_mapping( > if (unlikely(vma == NULL)) > return ERR_PTR(-ENOMEM); > > + INIT_VMA(vma); > vma->vm_start = addr; > vma->vm_end = addr + len; > > diff --git a/mm/nommu.c b/mm/nommu.c > index 749276beb109..acf7ca72ca90 100644 > --- a/mm/nommu.c > +++ b/mm/nommu.c > @@ -1210,6 +1210,7 @@ unsigned long do_mmap(struct file *file, > region->vm_flags = vm_flags; > region->vm_pgoff = pgoff; > > + INIT_VMA(vma); > vma->vm_flags = vm_flags; > vma->vm_pgoff = pgoff; > > -- > 2.21.0 >