mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-30 14:19:16 +00:00
6308499b5e
csum_and_copy_from_user and csum_and_copy_to_user are exported by a few architectures, but not actually used in modular code. Drop the exports. Link: https://lkml.kernel.org/r/20220421070440.1282704-1-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Cc: David Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
39 lines
813 B
C
39 lines
813 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
*
|
|
* Copyright (C) IBM Corporation, 2010
|
|
*
|
|
* Author: Anton Blanchard <anton@au.ibm.com>
|
|
*/
|
|
#include <linux/export.h>
|
|
#include <linux/compiler.h>
|
|
#include <linux/types.h>
|
|
#include <asm/checksum.h>
|
|
#include <linux/uaccess.h>
|
|
|
|
__wsum csum_and_copy_from_user(const void __user *src, void *dst,
|
|
int len)
|
|
{
|
|
__wsum csum;
|
|
|
|
if (unlikely(!user_read_access_begin(src, len)))
|
|
return 0;
|
|
|
|
csum = csum_partial_copy_generic((void __force *)src, dst, len);
|
|
|
|
user_read_access_end();
|
|
return csum;
|
|
}
|
|
|
|
__wsum csum_and_copy_to_user(const void *src, void __user *dst, int len)
|
|
{
|
|
__wsum csum;
|
|
|
|
if (unlikely(!user_write_access_begin(dst, len)))
|
|
return 0;
|
|
|
|
csum = csum_partial_copy_generic(src, (void __force *)dst, len);
|
|
|
|
user_write_access_end();
|
|
return csum;
|
|
}
|