diff options
| author | Heiko Carstens <hca@linux.ibm.com> | 2024-11-26 11:25:14 +0100 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2024-11-27 12:55:15 +0100 |
| commit | 7061c63919bde3bb0daa63e700a117ab1f2c97b1 (patch) | |
| tree | 67cb3145fd6e76903b4f940bbdd09af073fb1054 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | 5618c53d96d1bf2df07df8b9204773db28acbc1b (diff) | |
KVM: s390: Remove one byte cmpxchg() usage
Within sca_clear_ext_call() cmpxchg() is used to clear one or two bytes
(depending on sca format). The cmpxchg() calls are not supposed to fail; if
so that would be a bug. Given that cmpxchg() usage on one and two byte
areas generates very inefficient code, replace them with block concurrent
WRITE_ONCE() calls, and remove the WARN_ON().
Acked-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Acked-by: Janosch Frank <frankja@linux.ibm.com>
Link: https://lore.kernel.org/r/20241126102515.3178914-3-hca@linux.ibm.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions