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Thu, 26 Jan 2023 09:20:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2F7DBC433D2; Thu, 26 Jan 2023 09:19:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1674724832; bh=73aMcUob1WYX+/b4rggndOJ7N9caL088plxdfjSDDEQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=JmyjvNONg1SgIhjqFFggxa6D/d0DdvOOGuNt2dtDINzMuck9VRm1yrgcKsMjflpW+ SwTLsN9QAcAPFlEDt4IXaVuzKuvw/QTFDgiE6iXZrjCF1Dk77N344FV6FZLMxl/SIh YCzWCtWMyri2S/VxFa8w5izmma6QvGZR6W3LW+HhZQLDOEjS2QQ4+yWFtPAWXwzXjB 8sjW4u5olaD4DQ8+tTWSGydqMOF+S7T6bSIcqdA9DZQS+/0Qnjc5pNbohtILz6vsxE pH2w8v8IDyyC1JX/SGY55iAqC16GztTVGkZPd8qlGsAwBxzWAs0I60Xu7VFg5IVHwG yDtfzpUFPYi0Q== Date: Thu, 26 Jan 2023 11:19:37 +0200 From: Mike Rapoport To: Suren Baghdasaryan Cc: akpm@linux-foundation.org, michel@lespinasse.org, jglisse@google.com, mhocko@suse.com, vbabka@suse.cz, hannes@cmpxchg.org, mgorman@techsingularity.net, dave@stgolabs.net, willy@infradead.org, liam.howlett@oracle.com, peterz@infradead.org, ldufour@linux.ibm.com, paulmck@kernel.org, luto@kernel.org, songliubraving@fb.com, peterx@redhat.com, david@redhat.com, dhowells@redhat.com, hughd@google.com, bigeasy@linutronix.de, kent.overstreet@linux.dev, punit.agrawal@bytedance.com, lstoakes@gmail.com, peterjung1337@gmail.com, rientjes@google.com, axelrasmussen@google.com, joelaf@google.com, minchan@google.com, jannh@google.com, shakeelb@google.com, tatashin@google.com, edumazet@google.com, gthelen@google.com, gurua@google.com, arjunroy@google.com, soheil@google.com, hughlynch@google.com, leewalsh@google.com, posk@google.com, will@kernel.org, aneesh.kumar@linux.ibm.com, npiggin@gmail.com, chenhuacai@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, qianweili@huawei.com, wangzhou1@hisilicon.com, herbert@gondor.apana.org.au, davem@davemloft.net, vkoul@kernel.org, airlied@gmail.com, daniel@ffwll.ch, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, l.stach@pengutronix.de, krzysztof.kozlowski@linaro.org, patrik.r.jakobsson@gmail.com, matthias.bgg@gmail.com, robdclark@gmail.com, quic_abhinavk@quicinc.com, dmitry.baryshkov@linaro.org, tomba@kernel.org, hjc@rock-chips.com, heiko@sntech.de, ray.huang@amd.com, kraxel@redhat.com, sre@kernel.org, mcoquelin.stm32@gmail.com, alexandre.torgue@foss.st.com, tfiga@chromium.org, m.szyprowski@samsung.com, mchehab@kernel.org, dimitri.sivanich@hpe.com, zhangfei.gao@linaro.org, jejb@linux.ibm.com, martin.petersen@oracle.com, dgilbert@interlog.com, hdegoede@redhat.com, mst@redhat.com, jasowang@redhat.com, alex.williamson@redhat.com, deller@gmx.de, jayalk@intworks.biz, viro@zeniv.linux.org.uk, nico@fluxnic.net, xiang@kernel.org, chao@kernel.org, tytso@mit.edu, adilger.kernel@dilger.ca, miklos@szeredi.hu, mike.kravetz@oracle.com, muchun.song@linux.dev, bhe@redhat.com, andrii@kernel.org, yoshfuji@linux-ipv6.org, dsahern@kernel.org, kuba@kernel.org, pabeni@redhat.com, perex@perex.cz, tiwai@suse.com, haojian.zhuang@gmail.com, robert.jarzmik@free.fr, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, x86@kernel.org, linux-kernel@vger.kernel.org, linux-graphics-maintainer@vmware.com, linux-ia64@vger.kernel.org, linux-arch@vger.kernel.org, loongarch@lists.linux.dev, kvm@vger.kernel.org, linux-s390@vger.kernel.org, linux-sgx@vger.kernel.org, linux-um@lists.infradead.org, linux-acpi@vger.kernel.org, linux-crypto@vger.kernel.org, nvdimm@lists.linux.dev, dmaengine@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, etnaviv@lists.freedesktop.org, linux-samsung-soc@vger.kernel.org, intel-gfx@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, linux-rockchip@lists.infradead.org, linux-tegra@vger.kernel.org, virtualization@lists.linux-foundation.org, xen-devel@lists.xenproject.org, linux-stm32@st-md-mailman.stormreply.com, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, linux-accelerators@lists.ozlabs.org, sparclinux@vger.kernel.org, linux-scsi@vger.kernel.org, linux-staging@lists.linux.dev, target-devel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-aio@kvack.org, linux-fsdevel@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org, devel@lists.orangefs.org, kexec@lists.infradead.org, linux-xfs@vger.kernel.org, bpf@vger.kernel.org, linux-perf-users@vger.kernel.org, kasan-dev@googlegroups.com, selinux@vger.kernel.org, alsa-devel@alsa-project.org, kernel-team@android.com Subject: Re: [PATCH v2 2/6] mm: replace VM_LOCKED_CLEAR_MASK with VM_LOCKED_MASK Message-ID: References: <20230125083851.27759-1-surenb@google.com> <20230125083851.27759-3-surenb@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230125083851.27759-3-surenb@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-perf-users@vger.kernel.org On Wed, Jan 25, 2023 at 12:38:47AM -0800, Suren Baghdasaryan wrote: > To simplify the usage of VM_LOCKED_CLEAR_MASK in clear_vm_flags(), > replace it with VM_LOCKED_MASK bitmask and convert all users. > > Signed-off-by: Suren Baghdasaryan Acked-by: Mike Rapoport (IBM) > --- > include/linux/mm.h | 4 ++-- > kernel/fork.c | 2 +- > mm/hugetlb.c | 4 ++-- > mm/mlock.c | 6 +++--- > mm/mmap.c | 6 +++--- > mm/mremap.c | 2 +- > 6 files changed, 12 insertions(+), 12 deletions(-) > > diff --git a/include/linux/mm.h b/include/linux/mm.h > index b71f2809caac..da62bdd627bf 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -421,8 +421,8 @@ extern unsigned int kobjsize(const void *objp); > /* This mask defines which mm->def_flags a process can inherit its parent */ > #define VM_INIT_DEF_MASK VM_NOHUGEPAGE > > -/* This mask is used to clear all the VMA flags used by mlock */ > -#define VM_LOCKED_CLEAR_MASK (~(VM_LOCKED | VM_LOCKONFAULT)) > +/* This mask represents all the VMA flag bits used by mlock */ > +#define VM_LOCKED_MASK (VM_LOCKED | VM_LOCKONFAULT) > > /* Arch-specific flags to clear when updating VM flags on protection change */ > #ifndef VM_ARCH_CLEAR > diff --git a/kernel/fork.c b/kernel/fork.c > index 6683c1b0f460..03d472051236 100644 > --- a/kernel/fork.c > +++ b/kernel/fork.c > @@ -669,7 +669,7 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm, > tmp->anon_vma = NULL; > } else if (anon_vma_fork(tmp, mpnt)) > goto fail_nomem_anon_vma_fork; > - tmp->vm_flags &= ~(VM_LOCKED | VM_LOCKONFAULT); > + clear_vm_flags(tmp, VM_LOCKED_MASK); > file = tmp->vm_file; > if (file) { > struct address_space *mapping = file->f_mapping; > diff --git a/mm/hugetlb.c b/mm/hugetlb.c > index d20c8b09890e..4ecdbad9a451 100644 > --- a/mm/hugetlb.c > +++ b/mm/hugetlb.c > @@ -6973,8 +6973,8 @@ static unsigned long page_table_shareable(struct vm_area_struct *svma, > unsigned long s_end = sbase + PUD_SIZE; > > /* Allow segments to share if only one is marked locked */ > - unsigned long vm_flags = vma->vm_flags & VM_LOCKED_CLEAR_MASK; > - unsigned long svm_flags = svma->vm_flags & VM_LOCKED_CLEAR_MASK; > + unsigned long vm_flags = vma->vm_flags & ~VM_LOCKED_MASK; > + unsigned long svm_flags = svma->vm_flags & ~VM_LOCKED_MASK; > > /* > * match the virtual addresses, permission and the alignment of the > diff --git a/mm/mlock.c b/mm/mlock.c > index 0336f52e03d7..5c4fff93cd6b 100644 > --- a/mm/mlock.c > +++ b/mm/mlock.c > @@ -497,7 +497,7 @@ static int apply_vma_lock_flags(unsigned long start, size_t len, > if (vma->vm_start != tmp) > return -ENOMEM; > > - newflags = vma->vm_flags & VM_LOCKED_CLEAR_MASK; > + newflags = vma->vm_flags & ~VM_LOCKED_MASK; > newflags |= flags; > /* Here we know that vma->vm_start <= nstart < vma->vm_end. */ > tmp = vma->vm_end; > @@ -661,7 +661,7 @@ static int apply_mlockall_flags(int flags) > struct vm_area_struct *vma, *prev = NULL; > vm_flags_t to_add = 0; > > - current->mm->def_flags &= VM_LOCKED_CLEAR_MASK; > + current->mm->def_flags &= ~VM_LOCKED_MASK; > if (flags & MCL_FUTURE) { > current->mm->def_flags |= VM_LOCKED; > > @@ -681,7 +681,7 @@ static int apply_mlockall_flags(int flags) > for_each_vma(vmi, vma) { > vm_flags_t newflags; > > - newflags = vma->vm_flags & VM_LOCKED_CLEAR_MASK; > + newflags = vma->vm_flags & ~VM_LOCKED_MASK; > newflags |= to_add; > > /* Ignore errors */ > diff --git a/mm/mmap.c b/mm/mmap.c > index d4abc6feced1..323bd253b25a 100644 > --- a/mm/mmap.c > +++ b/mm/mmap.c > @@ -2671,7 +2671,7 @@ unsigned long mmap_region(struct file *file, unsigned long addr, > if ((vm_flags & VM_SPECIAL) || vma_is_dax(vma) || > is_vm_hugetlb_page(vma) || > vma == get_gate_vma(current->mm)) > - vma->vm_flags &= VM_LOCKED_CLEAR_MASK; > + clear_vm_flags(vma, VM_LOCKED_MASK); > else > mm->locked_vm += (len >> PAGE_SHIFT); > } > @@ -3340,8 +3340,8 @@ static struct vm_area_struct *__install_special_mapping( > vma->vm_start = addr; > vma->vm_end = addr + len; > > - vma->vm_flags = vm_flags | mm->def_flags | VM_DONTEXPAND | VM_SOFTDIRTY; > - vma->vm_flags &= VM_LOCKED_CLEAR_MASK; > + init_vm_flags(vma, (vm_flags | mm->def_flags | > + VM_DONTEXPAND | VM_SOFTDIRTY) & ~VM_LOCKED_MASK); > vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); > > vma->vm_ops = ops; > diff --git a/mm/mremap.c b/mm/mremap.c > index 1b3ee02bead7..35db9752cb6a 100644 > --- a/mm/mremap.c > +++ b/mm/mremap.c > @@ -687,7 +687,7 @@ static unsigned long move_vma(struct vm_area_struct *vma, > > if (unlikely(!err && (flags & MREMAP_DONTUNMAP))) { > /* We always clear VM_LOCKED[ONFAULT] on the old vma */ > - vma->vm_flags &= VM_LOCKED_CLEAR_MASK; > + clear_vm_flags(vma, VM_LOCKED_MASK); > > /* > * anon_vma links of the old vma is no longer needed after its page > -- > 2.39.1 > >