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| author | Uros Bizjak <ubizjak@gmail.com> | 2023-09-04 18:21:01 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-10-04 20:41:56 +0300 |
| commit | 9734fe4dc22052d8010cc0b68b092fe5335ccb31 (patch) | |
| tree | c61881b281bd291f964f6ccbda42af542fdffd72 /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | 398352049146e34ec6113a00c63457149a81345c (diff) | |
| download | linux-9734fe4dc22052d8010cc0b68b092fe5335ccb31.tar.xz | |
panic: use atomic_try_cmpxchg in panic() and nmi_panic()
Use atomic_try_cmpxchg instead of atomic_cmpxchg (*ptr, old, new) == old
in panic() and nmi_panic(). x86 CMPXCHG instruction returns success in ZF
flag, so this change saves a compare after cmpxchg (and related move
instruction in front of cmpxchg).
Also, rename cpu variable to this_cpu in nmi_panic() and try to unify
logic flow between panic() and nmi_panic().
No functional change intended.
[ubizjak@gmail.com: clean up if/else block]
Link: https://lkml.kernel.org/r/20230906191200.68707-1-ubizjak@gmail.com
Link: https://lkml.kernel.org/r/20230904152230.9227-1-ubizjak@gmail.com
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'tools/perf/scripts/python/export-to-sqlite.py')
0 files changed, 0 insertions, 0 deletions