diff options
Diffstat (limited to 'arch/score/lib/checksum_copy.c')
| -rw-r--r-- | arch/score/lib/checksum_copy.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/arch/score/lib/checksum_copy.c b/arch/score/lib/checksum_copy.c new file mode 100644 index 000000000000..04565dd3ded8 --- /dev/null +++ b/arch/score/lib/checksum_copy.c @@ -0,0 +1,52 @@ +/* + * arch/score/lib/csum_partial_copy.c + * + * Score Processor version. + * + * Copyright (C) 2009 Sunplus Core Technology Co., Ltd. + * Lennox Wu <lennox.wu@sunplusct.com> + * Chen Liqin <liqin.chen@sunplusct.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see the file COPYING, or write + * to the Free Software Foundation, Inc., + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <net/checksum.h> + +#include <asm/uaccess.h> + +unsigned int csum_partial_copy(const char *src, char *dst, + int len, unsigned int sum) +{ + sum = csum_partial(src, len, sum); + memcpy(dst, src, len); + + return sum; +} + +unsigned int csum_partial_copy_from_user(const char *src, char *dst, + int len, unsigned int sum, + int *err_ptr) +{ + int missing; + + missing = copy_from_user(dst, src, len); + if (missing) { + memset(dst + len - missing, 0, missing); + *err_ptr = -EFAULT; + } + + return csum_partial(dst, len, sum); +} |