diff options
| author | Babu Moger <babu.moger@oracle.com> | 2017-05-24 17:55:12 -0600 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-05-25 12:06:51 -0700 |
| commit | a12ee2349312d7112b9b7c6ac2e70c5ec2ca334e (patch) | |
| tree | f05689b6e06bbf9c03499ce2ad8728546a0b54cc /tools/perf/scripts/python | |
| parent | 97d9f969161d79e6a4bba247e67ce731ff861f79 (diff) | |
arch/sparc: Introduce cmpxchg_u8 SPARC
SPARC supports 32 bit and 64 bit cmpxchg right now. Add support
for 8 bit (1 byte) cmpxchg. This is required to support queued
rwlocks feature which uses 1 byte cmpxchg.
The function __cmpxchg_u8 here uses the 4 byte cas instruction with a
byte manipulation to achieve 1 byte cmpxchg.
Signed-off-by: Babu Moger <babu.moger@oracle.com>
Reviewed-by: Håkon Bugge <haakon.bugge@oracle.com>
Reviewed-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
Reviewed-by: Jane Chu <jane.chu@oracle.com>
Reviewed-by: Vijay Kumar <vijay.ac.kumar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions