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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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4
arch/sparc/include/asm/checksum_32.h
View File

@@ -42,7 +42,7 @@ __wsum csum_partial(const void *buff, int len, __wsum sum);
unsigned int __csum_partial_copy_sparc_generic (const unsigned char *, unsigned char *);
static inline __wsum
csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum)
csum_partial_copy_nocheck(const void *src, void *dst, int len)
{
register unsigned int ret asm("o0") = (unsigned int)src;
register char *d asm("o1") = dst;
@@ -52,7 +52,7 @@ csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum)
"call __csum_partial_copy_sparc_generic\n\t"
" mov %6, %%g7\n"
: "=&r" (ret), "=&r" (d), "=&r" (l)
: "0" (ret), "1" (d), "2" (l), "r" (sum)
: "0" (ret), "1" (d), "2" (l), "r" (0)
: "o2", "o3", "o4", "o5", "o7",
"g2", "g3", "g4", "g5", "g7",
"memory", "cc");

8
arch/sparc/include/asm/checksum_64.h
View File

@@ -38,8 +38,12 @@ __wsum csum_partial(const void * buff, int len, __wsum sum);
* here even more important to align src and dst on a 32-bit (or even
* better 64-bit) boundary
*/
__wsum csum_partial_copy_nocheck(const void *src, void *dst,
int len, __wsum sum);
__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_nocheck(src, dst, len, 0);
}
long __csum_partial_copy_from_user(const void __user *src,
void *dst, int len,