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Fri, 04 Jun 2021 13:59:21 -0700 (PDT) MIME-Version: 1.0 References: <20210603160928.3854180-1-Liam.Howlett@Oracle.com> <4d2e62c7-af4c-b977-a05c-97b664b532b3@gmail.com> In-Reply-To: <4d2e62c7-af4c-b977-a05c-97b664b532b3@gmail.com> From: Alex Deucher Date: Fri, 4 Jun 2021 16:59:10 -0400 Message-ID: Subject: Re: [PATCH] drm/amdgpu: Use vma_lookup() in amdgpu_ttm_tt_get_user_pages() To: =?UTF-8?Q?Christian_K=C3=B6nig?= Cc: Liam Howlett , Andrew Morton , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "amd-gfx@lists.freedesktop.org" , "dri-devel@lists.freedesktop.org" , David Airlie Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Authentication-Results: imf24.hostedemail.com; dkim=pass header.d=gmail.com header.s=20161025 header.b=Y3QUX1ZA; spf=pass (imf24.hostedemail.com: domain of alexdeucher@gmail.com designates 209.85.167.173 as permitted sender) smtp.mailfrom=alexdeucher@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 3B16AA000924 X-Stat-Signature: gq6jkw5ex8paamb1yhdxffpwpfdpybnw X-HE-Tag: 1622874263-629161 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 Fri, Jun 4, 2021 at 7:11 AM Christian K=C3=B6nig wrote: > > Am 03.06.21 um 18:09 schrieb Liam Howlett: > > Use vma_lookup() to find the VMA at a specific address. As vma_lookup(= ) > > will return NULL if the address is not within any VMA, the start addres= s > > no longer needs to be validated. > > > > Signed-off-by: Liam R. Howlett > > Reviewed-by: Christian K=C3=B6nig > I'm fine to have this go through whatever tree makes sense. Acked-by: Alex Deucher > > --- > > drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 ++-- > > 1 file changed, 2 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/= amd/amdgpu/amdgpu_ttm.c > > index 7cb7ffdd1900..dfb5ca3f8da8 100644 > > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c > > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c > > @@ -680,9 +680,9 @@ int amdgpu_ttm_tt_get_user_pages(struct amdgpu_bo *= bo, struct page **pages) > > return -ESRCH; > > > > mmap_read_lock(mm); > > - vma =3D find_vma(mm, start); > > + vma =3D vma_lookup(mm, start); > > mmap_read_unlock(mm); > > - if (unlikely(!vma || start < vma->vm_start)) { > > + if (unlikely(!vma)) { > > r =3D -EFAULT; > > goto out_putmm; > > } >