iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ppc: propagate the calling conventions change down to csum_partial_copy_generic()

Browse Source 
... and get rid of the pointless fallback in the wrappers.  On error it used
to zero the unwritten area and calculate the csum of the entire thing.  Not
wanting to do it in assembler part had been very reasonable; doing that in
the first place, OTOH...  In case of an error the caller discards the data
we'd copied, along with whatever checksum it might've had.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2020-07-20 10:09:24 -04:00
parent daf52375c1
commit 70d65cd555
4 changed files with 46 additions and 103 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
arch/powerpc/include/asm/checksum.h
View File

@ -18,9 +18,7 @@
* Like csum_partial, this must be called with even lengths,
* except for the last fragment.
*/
extern __wsum csum_partial_copy_generic(const void *src, void *dst,
int len, __wsum sum,
int *src_err, int *dst_err);
extern __wsum csum_partial_copy_generic(const void *src, void *dst, int len);
#define _HAVE_ARCH_COPY_AND_CSUM_FROM_USER
extern __wsum csum_and_copy_from_user(const void __user *src, void *dst,
@ -31,7 +29,7 @@ extern __wsum csum_and_copy_to_user(const void *src, void __user *dst,
#define _HAVE_ARCH_CSUM_AND_COPY
#define csum_partial_copy_nocheck(src, dst, len) \
csum_partial_copy_generic((src), (dst), (len), 0, NULL, NULL)
csum_partial_copy_generic((src), (dst), (len))
/*