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| author | Paul E. McKenney <paulmck@kernel.org> | 2025-07-01 17:23:26 -0700 |
|---|---|---|
| committer | Neeraj Upadhyay (AMD) <neeraj.upadhyay@kernel.org> | 2025-07-16 09:44:44 +0530 |
| commit | cbd5d35e6ddc47b4cde5c96a0d5f00da0f8e881f (patch) | |
| tree | b39b185c47fddfa912d84db22ebf3430ce7d8f20 /kernel/rcu | |
| parent | torture: Make torture.sh --allmodconfig testing fail on warnings (diff) | |
| download | linux-cbd5d35e6ddc47b4cde5c96a0d5f00da0f8e881f.tar.gz linux-cbd5d35e6ddc47b4cde5c96a0d5f00da0f8e881f.zip | |
torture: Remove support for SRCU-lite
Because SRCU-lite is being replaced by SRCU-fast, this commit removes
support for SRCU-lite from refscale.c.
Both SRCU-lite and SRCU-fast provide faster readers by dropping the
smp_mb() call from their lock and unlock primitives, but incur a pair
of added RCU grace periods during the SRCU grace period. There is a
trivial mapping from the SRCU-lite API to that of SRCU-fast, so there
should be no transition issues.
[ paulmck: Apply Christoph Hellwig feedback. ]
Signed-off-by: "Paul E. McKenney" <paulmck@kernel.org>
Signed-off-by: Neeraj Upadhyay (AMD) <neeraj.upadhyay@kernel.org>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/refscale.c | 32 |
1 files changed, 1 insertions, 31 deletions
diff --git a/kernel/rcu/refscale.c b/kernel/rcu/refscale.c index f11a7c2af778..f4b2cea1cce5 100644 --- a/kernel/rcu/refscale.c +++ b/kernel/rcu/refscale.c @@ -246,36 +246,6 @@ static const struct ref_scale_ops srcu_fast_ops = { .name = "srcu-fast" }; -static void srcu_lite_ref_scale_read_section(const int nloops) -{ - int i; - int idx; - - for (i = nloops; i >= 0; i--) { - idx = srcu_read_lock_lite(srcu_ctlp); - srcu_read_unlock_lite(srcu_ctlp, idx); - } -} - -static void srcu_lite_ref_scale_delay_section(const int nloops, const int udl, const int ndl) -{ - int i; - int idx; - - for (i = nloops; i >= 0; i--) { - idx = srcu_read_lock_lite(srcu_ctlp); - un_delay(udl, ndl); - srcu_read_unlock_lite(srcu_ctlp, idx); - } -} - -static const struct ref_scale_ops srcu_lite_ops = { - .init = rcu_sync_scale_init, - .readsection = srcu_lite_ref_scale_read_section, - .delaysection = srcu_lite_ref_scale_delay_section, - .name = "srcu-lite" -}; - #ifdef CONFIG_TASKS_RCU // Definitions for RCU Tasks ref scale testing: Empty read markers. @@ -1193,7 +1163,7 @@ ref_scale_init(void) long i; int firsterr = 0; static const struct ref_scale_ops *scale_ops[] = { - &rcu_ops, &srcu_ops, &srcu_fast_ops, &srcu_lite_ops, RCU_TRACE_OPS RCU_TASKS_OPS + &rcu_ops, &srcu_ops, &srcu_fast_ops, RCU_TRACE_OPS RCU_TASKS_OPS &refcnt_ops, &rwlock_ops, &rwsem_ops, &lock_ops, &lock_irq_ops, &acqrel_ops, &sched_clock_ops, &clock_ops, &jiffies_ops, &typesafe_ref_ops, &typesafe_lock_ops, &typesafe_seqlock_ops, |