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MIPS: asm: checksum: Add MIPS specific csum_and_copy_from_user function

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A MIPS specific csum_and_copy_from_user function is necessary because
the generic one from include/net/checksum.h will not work for EVA.
This is because the generic one will link to symbols from lib/checksum.c
which are not EVA aware.

Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
This commit is contained in:
Leonid Yegoshin 2013-12-17 09:30:13 +00:00 committed by Ralf Baechle
parent fb316913f8
commit c2d85bc104
1 changed files with 14 additions and 0 deletions
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14
arch/mips/include/asm/checksum.h
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@ -54,6 +54,20 @@ __wsum csum_partial_copy_from_user(const void __user *src, void *dst, int len,
len, sum, err_ptr);
}
#define _HAVE_ARCH_COPY_AND_CSUM_FROM_USER
static inline
__wsum csum_and_copy_from_user(const void __user *src, void *dst,
int len, __wsum sum, int *err_ptr)
{
if (access_ok(VERIFY_READ, src, len))
return csum_partial_copy_from_user(src, dst, len, sum,
err_ptr);
if (len)
*err_ptr = -EFAULT;
return sum;
}
/*
* Copy and checksum to user
*/