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xtensa: switch to providing csum_and_copy_from_user()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2020-02-18 13:12:08 -05:00
parent 76666be8c9
commit d341659f47
1 changed files with 7 additions and 4 deletions
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11
arch/xtensa/include/asm/checksum.h
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@ -44,8 +44,6 @@ asmlinkage __wsum csum_partial_copy_generic(const void *src, void *dst,
/*
* Note: when you get a NULL pointer exception here this means someone
* passed in an incorrect kernel address to one of these functions.
*
* If you use these functions directly please don't forget the access_ok().
*/
static inline
__wsum csum_partial_copy_nocheck(const void *src, void *dst,
@ -54,12 +52,17 @@ __wsum csum_partial_copy_nocheck(const void *src, void *dst,
return csum_partial_copy_generic(src, dst, len, sum, NULL, NULL);
}
#define _HAVE_ARCH_COPY_AND_CSUM_FROM_USER
static inline
__wsum csum_partial_copy_from_user(const void __user *src, void *dst,
__wsum csum_and_copy_from_user(const void __user *src, void *dst,
int len, __wsum sum, int *err_ptr)
{
return csum_partial_copy_generic((__force const void *)src, dst,
if (access_ok(dst, len))
return csum_partial_copy_generic((__force const void *)src, dst,
len, sum, err_ptr, NULL);
if (len)
*err_ptr = -EFAULT;
return sum;
}
/*