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[109.64.41.91]) by smtp.gmail.com with ESMTPSA id v24sm2480851wmh.45.2020.05.20.01.55.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 May 2020 01:55:49 -0700 (PDT) Date: Wed, 20 May 2020 04:55:47 -0400 From: "Michael S. Tsirkin" To: Jason Wang Cc: geert@linux-m68k.org, linux-m68k@lists.linux-m68k.org, linux-kernel@vger.kernel.org, kbuild test robot Subject: Re: [PATCH] m68k: add missing __user annotation in get_user() Message-ID: <20200520045441-mutt-send-email-mst@kernel.org> References: <20200520065750.8401-1-jasowang@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200520065750.8401-1-jasowang@redhat.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 20, 2020 at 02:57:50PM +0800, Jason Wang wrote: > The ptr is a pointer to userspace memory. So we need annotate it with > __user otherwise we may get sparse warnings like: > > drivers/vhost/vhost.c:1603:13: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const *__gu_ptr @@ got unsigned int [noderef] [usertypvoid const *__gu_ptr @@ > drivers/vhost/vhost.c:1603:13: sparse: expected void const *__gu_ptr > drivers/vhost/vhost.c:1603:13: sparse: got unsigned int [noderef] [usertype] *idxp > > Cc: Geert Uytterhoeven > Cc: linux-m68k@lists.linux-m68k.org > Cc: linux-kernel@vger.kernel.org > Reported-by: kbuild test robot > Signed-off-by: Jason Wang Makes sense: Acked-by: Michael S. Tsirkin > --- > arch/m68k/include/asm/uaccess_mm.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/m68k/include/asm/uaccess_mm.h b/arch/m68k/include/asm/uaccess_mm.h > index 7e85de984df1..9ae9f8d05925 100644 > --- a/arch/m68k/include/asm/uaccess_mm.h > +++ b/arch/m68k/include/asm/uaccess_mm.h > @@ -142,7 +142,7 @@ asm volatile ("\n" \ > __get_user_asm(__gu_err, x, ptr, u32, l, r, -EFAULT); \ > break; \ > case 8: { \ > - const void *__gu_ptr = (ptr); \ > + const void __user *__gu_ptr = (ptr); \ > union { \ > u64 l; \ > __typeof__(*(ptr)) t; \ > -- > 2.20.1