| commit | 52499d93d6dec3872de3b982219af6d4c182a452 | |
| author | Heiko Carstens <heiko.carstens@de.ibm.com> | |
| Fri, 12 Feb 2016 11:40:31 +0000 (12 12:40 +0100) | ||
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | |
| Wed, 17 Feb 2016 08:05:04 +0000 (17 09:05 +0100) | ||
| tree | 4565561ab51516a02a27bf26438b5de2bd2fc5db | treesnapshot (tar.gz zip) |
| parent | f6c9b160233f9b5afe926b91b55589b706076640 | commitdiff |
s390/maccess: reduce stnsm instructions
When fixing the DAT off bug ("s390: fix DAT off memory access, e.g.
on kdump") both Christian and I missed that we can save an additional
stnsm instruction.
This saves us a couple of cycles which could improve the speed of
memcpy_real.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
When fixing the DAT off bug ("s390: fix DAT off memory access, e.g.
on kdump") both Christian and I missed that we can save an additional
stnsm instruction.
This saves us a couple of cycles which could improve the speed of
memcpy_real.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| arch/s390/mm/maccess.c | diffblobblamehistory |