From: Al Viro <viro@ZenIV.linux.org.uk>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [RFC][PATCH 04/14] x86: switch 32bit csum_and_copy_to_user() to user_access_{begin,end}()
Date: Fri, 27 Mar 2020 23:31:07 +0000 [thread overview]
Message-ID: <20200327233117.1031393-4-viro@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20200327233117.1031393-1-viro@ZenIV.linux.org.uk>
From: Al Viro <viro@zeniv.linux.org.uk>
consolidate HAVE_CSUM_COPY_USER for 32bit and 64bit, while are at it
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
arch/x86/include/asm/checksum.h | 1 +
arch/x86/include/asm/checksum_32.h | 6 ++----
arch/x86/include/asm/checksum_64.h | 3 ---
3 files changed, 3 insertions(+), 7 deletions(-)
diff --git a/arch/x86/include/asm/checksum.h b/arch/x86/include/asm/checksum.h
index 1ab9572ae4c2..0ada98d5d09f 100644
--- a/arch/x86/include/asm/checksum.h
+++ b/arch/x86/include/asm/checksum.h
@@ -1,5 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0 */
#define _HAVE_ARCH_COPY_AND_CSUM_FROM_USER 1
+#define HAVE_CSUM_COPY_USER
#ifdef CONFIG_X86_32
# include <asm/checksum_32.h>
#else
diff --git a/arch/x86/include/asm/checksum_32.h b/arch/x86/include/asm/checksum_32.h
index 2487b7fc2d24..11624c8a9d8d 100644
--- a/arch/x86/include/asm/checksum_32.h
+++ b/arch/x86/include/asm/checksum_32.h
@@ -176,7 +176,6 @@ static inline __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
/*
* Copy and checksum to user
*/
-#define HAVE_CSUM_COPY_USER
static inline __wsum csum_and_copy_to_user(const void *src,
void __user *dst,
int len, __wsum sum,
@@ -185,11 +184,10 @@ static inline __wsum csum_and_copy_to_user(const void *src,
__wsum ret;
might_sleep();
- if (access_ok(dst, len)) {
- stac();
+ if (user_access_begin(dst, len)) {
ret = csum_partial_copy_generic(src, (__force void *)dst,
len, sum, NULL, err_ptr);
- clac();
+ user_access_end();
return ret;
}
diff --git a/arch/x86/include/asm/checksum_64.h b/arch/x86/include/asm/checksum_64.h
index 2f8435542376..0a289b87e872 100644
--- a/arch/x86/include/asm/checksum_64.h
+++ b/arch/x86/include/asm/checksum_64.h
@@ -129,9 +129,6 @@ static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
*/
extern __wsum csum_partial(const void *buff, int len, __wsum sum);
-#define HAVE_CSUM_COPY_USER 1
-
-
/* Do not call this directly. Use the wrappers below */
extern __visible __wsum csum_partial_copy_generic(const void *src, const void *dst,
int len, __wsum sum,
--
2.11.0
next prev parent reply other threads:[~2020-03-27 23:31 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-27 23:30 [RFC][PATCHSET] uaccess: getting csum_and_copy_..._user() into saner shape Al Viro
2020-03-27 23:30 ` Al Viro
2020-03-27 23:31 ` [RFC][PATCH 01/14] get rid of csum_partial_copy_to_user() Al Viro
2020-03-27 23:31 ` [RFC][PATCH 02/14] x86_64: csum_..._copy_..._user(): switch to unsafe_..._user() Al Viro
2020-03-27 23:31 ` [RFC][PATCH 03/14] x86: switch both 32bit and 64bit to providing csum_and_copy_from_user() Al Viro
2020-03-27 23:31 ` Al Viro
2020-03-27 23:31 ` Al Viro [this message]
2020-03-27 23:31 ` [RFC][PATCH 04/14] x86: switch 32bit csum_and_copy_to_user() to user_access_{begin,end}() Al Viro
2020-03-27 23:31 ` [RFC][PATCH 05/14] ia64: csum_partial_copy_nocheck(): don't abuse csum_partial_copy_from_user() Al Viro
2020-03-27 23:31 ` Al Viro
2020-06-03 15:37 ` Guenter Roeck
2020-06-03 19:10 ` Al Viro
2020-03-27 23:31 ` [RFC][PATCH 06/14] ia64: turn csum_partial_copy_from_user() into csum_and_copy_from_user() Al Viro
2020-03-27 23:31 ` Al Viro
2020-03-27 23:31 ` [RFC][PATCH 07/14] alpha: " Al Viro
2020-03-27 23:31 ` [RFC][PATCH 08/14] parisc: " Al Viro
2020-03-27 23:31 ` Al Viro
2020-03-27 23:31 ` [RFC][PATCH 09/14] sparc: switch to providing csum_and_copy_from_user() Al Viro
2020-03-27 23:31 ` Al Viro
2020-03-27 23:31 ` [RFC][PATCH 10/14] xtensa: " Al Viro
2020-03-27 23:31 ` [RFC][PATCH 11/14] m68k: convert to csum_and_copy_from_user() Al Viro
2020-03-27 23:31 ` Al Viro
2020-03-27 23:31 ` [RFC][PATCH 12/14] sh32: " Al Viro
2020-03-27 23:31 ` [RFC][PATCH 13/14] arm: switch " Al Viro
2020-03-27 23:31 ` [RFC][PATCH 14/14] take the dummy csum_and_copy_from_user() into net/checksum.h Al Viro
2020-03-27 23:31 ` Al Viro
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