53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
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/*
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* arch/score/lib/csum_partial_copy.c
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*
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* Score Processor version.
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*
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* Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
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* Lennox Wu <lennox.wu@sunplusct.com>
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* Chen Liqin <liqin.chen@sunplusct.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <net/checksum.h>
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#include <asm/uaccess.h>
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unsigned int csum_partial_copy(const char *src, char *dst,
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int len, unsigned int sum)
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{
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sum = csum_partial(src, len, sum);
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memcpy(dst, src, len);
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return sum;
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}
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unsigned int csum_partial_copy_from_user(const char *src, char *dst,
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int len, unsigned int sum,
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int *err_ptr)
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{
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int missing;
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missing = copy_from_user(dst, src, len);
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if (missing) {
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memset(dst + len - missing, 0, missing);
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*err_ptr = -EFAULT;
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}
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return csum_partial(dst, len, sum);
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}
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