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From: Jason Wang <jasowang@redhat.com>
To: geert@linux-m68k.org
Cc: linux-m68k@lists.linux-m68k.org, linux-kernel@vger.kernel.org,
	mst@redhat.com, Jason Wang <jasowang@redhat.com>,
	kbuild test robot <lkp@intel.com>
Subject: [PATCH] m68k: add missing __user annotation in get_user()
Date: Wed, 20 May 2020 14:57:50 +0800
Message-ID: <20200520065750.8401-1-jasowang@redhat.com> (raw)

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] <asn:1> *idxp

Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: linux-m68k@lists.linux-m68k.org
Cc: linux-kernel@vger.kernel.org
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 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


             reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-20  6:57 Jason Wang [this message]
2020-05-20  8:55 ` Michael S. Tsirkin
2020-05-25  8:47 ` Geert Uytterhoeven

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