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| author | Paul E. McKenney <paulmck@kernel.org> | 2022-09-28 21:21:54 +0300 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2022-10-21 20:14:52 +0300 |
| commit | 3f48f3d91c56e61b3965e43d2bdaca0c2f3ece3b (patch) | |
| tree | 03183877b7c05f8c252857b37414639892803622 /tools/perf/scripts/python/exported-sql-viewer.py | |
| parent | 6cc9203b8e325d0ef21a7dc345d04fdb50b52a8a (diff) | |
| download | linux-3f48f3d91c56e61b3965e43d2bdaca0c2f3ece3b.tar.xz | |
arch/loongarch: Add ARCH_HAS_NMI_SAFE_THIS_CPU_OPS Kconfig option
The loongarch architecture uses the atomic read-modify-write
amadd instruction to implement this_cpu_add(), which is NMI safe.
This means that the old and more-efficient srcu_read_lock() may be
used in NMI context, without the need for srcu_read_lock_nmisafe().
Therefore, add the new Kconfig option ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
to arch/loongarch/Kconfig, which will cause NEED_SRCU_NMI_SAFE to be
deselected, thus preserving the current srcu_read_lock() behavior.
Link: https://lore.kernel.org/all/20220910221947.171557773@linutronix.de/
Suggested-by: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Suggested-by: Frederic Weisbecker <frederic@kernel.org>
Suggested-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: WANG Xuerui <kernel@xen0n.name>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Petr Mladek <pmladek@suse.com>
Cc: <loongarch@lists.linux.dev>
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
0 files changed, 0 insertions, 0 deletions