s390/crash: make copy_oldmem_page() return number of bytes copied
authorAlexander Gordeev <agordeev@linux.ibm.com>
Thu, 9 Jun 2022 19:32:39 +0000 (21:32 +0200)
committerAlexander Gordeev <agordeev@linux.ibm.com>
Thu, 23 Jun 2022 15:23:30 +0000 (17:23 +0200)
commitaf2debd58bd769e38f538143f0d332e15d753396
tree78518674a432339bfa0255c862e662bb9fa52467
parentcc02e6e21aa5f2ac0defe8c15e5a9d024da6e73d
s390/crash: make copy_oldmem_page() return number of bytes copied

Callback copy_oldmem_page() returns either error code or zero.
Instead, it should return the error code or number of bytes copied.

Fixes: df9694c7975f ("s390/dump: streamline oldmem copy functions")
Reviewed-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Tested-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
arch/s390/kernel/crash_dump.c