From: David Hildenbrand <david@redhat.com>
To: Miaohe Lin <linmiaohe@huawei.com>, akpm@linux-foundation.org
Cc: imbrenda@linux.ibm.com, kirill.shutemov@linux.intel.com,
jack@suse.cz, jhubbard@nvidia.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 5/5] mm: gup: use helper PAGE_ALIGNED in populate_vma_page_range()
Date: Mon, 9 Aug 2021 11:24:09 +0200 [thread overview]
Message-ID: <60e83492-db02-4c73-1fd4-e1f2ba383cfe@redhat.com> (raw)
In-Reply-To: <20210807093620.21347-6-linmiaohe@huawei.com>
On 07.08.21 11:36, Miaohe Lin wrote:
> Use helper PAGE_ALIGNED to check if address is aligned to PAGE_SIZE.
> Minor readability improvement.
>
> Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
> ---
> mm/gup.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/mm/gup.c b/mm/gup.c
> index 8c89e614d4aa..802a3deb50cd 100644
> --- a/mm/gup.c
> +++ b/mm/gup.c
> @@ -1471,8 +1471,8 @@ long populate_vma_page_range(struct vm_area_struct *vma,
> unsigned long nr_pages = (end - start) / PAGE_SIZE;
> int gup_flags;
>
> - VM_BUG_ON(start & ~PAGE_MASK);
> - VM_BUG_ON(end & ~PAGE_MASK);
> + VM_BUG_ON(!PAGE_ALIGNED(start));
> + VM_BUG_ON(!PAGE_ALIGNED(end));
> VM_BUG_ON_VMA(start < vma->vm_start, vma);
> VM_BUG_ON_VMA(end > vma->vm_end, vma);
> mmap_assert_locked(mm);
>
Making it look more like faultin_vma_page_range(), nice :)
Reviewed-by: David Hildenbrand <david@redhat.com>
--
Thanks,
David / dhildenb
next prev parent reply other threads:[~2021-08-09 9:24 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-07 9:36 [PATCH 0/5] Cleanups and fixup for gup Miaohe Lin
2021-08-07 9:36 ` [PATCH 1/5] mm: gup: remove set but unused local variable major Miaohe Lin
2021-08-09 9:21 ` David Hildenbrand
2021-08-07 9:36 ` [PATCH 2/5] mm: gup: remove unneed local variable orig_refs Miaohe Lin
2021-08-09 9:22 ` David Hildenbrand
2021-08-07 9:36 ` [PATCH 3/5] mm: gup: remove useless BUG_ON in __get_user_pages() Miaohe Lin
2021-08-09 9:23 ` David Hildenbrand
2021-08-07 9:36 ` [PATCH 4/5] mm: gup: fix potential pgmap refcnt leak in __gup_device_huge() Miaohe Lin
2021-08-07 18:41 ` Andrew Morton
2021-08-07 18:45 ` Andrew Morton
2021-08-08 21:16 ` John Hubbard
2021-08-07 9:36 ` [PATCH 5/5] mm: gup: use helper PAGE_ALIGNED in populate_vma_page_range() Miaohe Lin
2021-08-09 9:24 ` David Hildenbrand [this message]
2021-08-08 21:13 ` [PATCH 0/5] Cleanups and fixup for gup John Hubbard
2021-08-09 9:39 ` Claudio Imbrenda
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