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| author | Uros Bizjak <ubizjak@gmail.com> | 2024-06-05 20:13:15 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2024-07-17 16:28:11 +0200 |
| commit | 6e30a7c98a9fda2f894e970e9cd637657f39c59d (patch) | |
| tree | 70618796d6d3dfe48fe0b236febfb5e60d0e3982 /fs | |
| parent | 51835949dda3783d4639cfa74ce13a3c9829de00 (diff) | |
locking/atomic/x86: Introduce the read64_nonatomic macro to x86_32 with cx8
As described in commit:
e73c4e34a0e9 ("locking/atomic/x86: Introduce arch_atomic64_read_nonatomic() to x86_32")
the value preload before the CMPXCHG loop does not need to be atomic.
Introduce the read64_nonatomic assembly macro to load the value from a
atomic_t location in a faster non-atomic way and use it in
atomic64_cx8_32.S.
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20240605181424.3228-1-ubizjak@gmail.com
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions