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| author | Heiko Carstens <hca@linux.ibm.com> | 2023-02-24 11:02:36 +0100 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2023-02-28 13:19:05 +0100 |
| commit | 434b26605f6cc500c1a995587e5c4bc4bc1693c6 (patch) | |
| tree | 6a8fc7fdd6f59486387ce18a1e325e8247457f71 /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | ebf95e884694b2c796ecb53d80d2b4cff8990d2f (diff) | |
s390/rwonce: add READ_ONCE_ALIGNED_128() macro
Add an s390 specific READ_ONCE_ALIGNED_128() helper, which can be used for
fast block concurrent (atomic) 128-bit accesses.
The used lpq instruction requires 128-bit alignment. This is also the
reason why the compiler doesn't emit this instruction if __READ_ONCE() is
used for 128-bit accesses.
Link: https://lore.kernel.org/r/20230224100237.3247871-2-hca@linux.ibm.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-sqlite.py')
0 files changed, 0 insertions, 0 deletions