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csum_partial_copy_nocheck(): drop the last argument

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It's always 0.  Note that we theoretically could use ~0U as well -
result will be the same modulo 0xffff, _if_ the damn thing did the
right thing for any value of initial sum; later we'll make use of
that when convenient.

However, unlike csum_and_copy_..._user(), there are instances that
did not work for arbitrary initial sums; c6x is one such.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2020-07-11 00:12:07 -04:00
parent 6e41c585e3
commit cc44c17baf
27 changed files with 49 additions and 48 deletions
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5
arch/x86/include/asm/checksum_32.h
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@@ -38,10 +38,9 @@ asmlinkage __wsum csum_partial_copy_generic(const void *src, void *dst,
* 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,
int len, __wsum sum)
static inline __wsum csum_partial_copy_nocheck(const void *src, void *dst, int len)
{
return csum_partial_copy_generic(src, dst, len, sum, NULL, NULL);
return csum_partial_copy_generic(src, dst, len, 0, NULL, NULL);
}
static inline __wsum csum_and_copy_from_user(const void __user *src,

3
arch/x86/include/asm/checksum_64.h
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@@ -139,8 +139,7 @@ extern __wsum csum_and_copy_from_user(const void __user *src, void *dst,
int len, __wsum isum, int *errp);
extern __wsum csum_and_copy_to_user(const void *src, void __user *dst,
int len, __wsum isum, int *errp);
extern __wsum csum_partial_copy_nocheck(const void *src, void *dst,
int len, __wsum sum);
extern __wsum csum_partial_copy_nocheck(const void *src, void *dst, int len);
/**
* ip_compute_csum - Compute an 16bit IP checksum.