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| author | Paul E. McKenney <paulmck@kernel.org> | 2024-10-15 09:11:00 -0700 |
|---|---|---|
| committer | Frederic Weisbecker <frederic@kernel.org> | 2024-11-12 15:41:30 +0100 |
| commit | 365f34483be33a9d0151c06ac39627d7927210d9 (patch) | |
| tree | b012e61bc572f88ce0ccac97266739c4b727ed60 /kernel/rcu | |
| parent | e3d6718677628680ae75a42bdb2cdc27d28e8ce8 (diff) | |
| download | lwn-365f34483be33a9d0151c06ac39627d7927210d9.tar.gz lwn-365f34483be33a9d0151c06ac39627d7927210d9.zip | |
srcu: Renaming in preparation for additional reader flavor
Currently, there are only two flavors of readers, normal and NMI-safe.
A number of fields, functions, and types reflect this restriction.
This renaming-only commit prepares for the addition of light-weight
(as in memory-barrier-free) readers. OK, OK, there is also a drive-by
white-space fixeup!
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: <bpf@vger.kernel.org>
Reviewed-by: Neeraj Upadhyay <Neeraj.Upadhyay@amd.com>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/srcutree.c | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/kernel/rcu/srcutree.c b/kernel/rcu/srcutree.c index 5b1a315f77bc..f259dd834272 100644 --- a/kernel/rcu/srcutree.c +++ b/kernel/rcu/srcutree.c @@ -460,7 +460,7 @@ static unsigned long srcu_readers_unlock_idx(struct srcu_struct *ssp, int idx) sum += atomic_long_read(&cpuc->srcu_unlock_count[idx]); if (IS_ENABLED(CONFIG_PROVE_RCU)) - mask = mask | READ_ONCE(cpuc->srcu_nmi_safety); + mask = mask | READ_ONCE(cpuc->srcu_reader_flavor); } WARN_ONCE(IS_ENABLED(CONFIG_PROVE_RCU) && (mask & (mask >> 1)), "Mixed NMI-safe readers for srcu_struct at %ps.\n", ssp); @@ -699,25 +699,25 @@ EXPORT_SYMBOL_GPL(cleanup_srcu_struct); #ifdef CONFIG_PROVE_RCU /* - * Check for consistent NMI safety. + * Check for consistent reader flavor. */ -void srcu_check_nmi_safety(struct srcu_struct *ssp, bool nmi_safe) +void srcu_check_read_flavor(struct srcu_struct *ssp, int read_flavor) { - int nmi_safe_mask = 1 << nmi_safe; - int old_nmi_safe_mask; + int reader_flavor_mask = 1 << read_flavor; + int old_reader_flavor_mask; struct srcu_data *sdp; /* NMI-unsafe use in NMI is a bad sign */ - WARN_ON_ONCE(!nmi_safe && in_nmi()); + WARN_ON_ONCE(!read_flavor && in_nmi()); sdp = raw_cpu_ptr(ssp->sda); - old_nmi_safe_mask = READ_ONCE(sdp->srcu_nmi_safety); - if (!old_nmi_safe_mask) { - WRITE_ONCE(sdp->srcu_nmi_safety, nmi_safe_mask); + old_reader_flavor_mask = READ_ONCE(sdp->srcu_reader_flavor); + if (!old_reader_flavor_mask) { + WRITE_ONCE(sdp->srcu_reader_flavor, reader_flavor_mask); return; } - WARN_ONCE(old_nmi_safe_mask != nmi_safe_mask, "CPU %d old state %d new state %d\n", sdp->cpu, old_nmi_safe_mask, nmi_safe_mask); + WARN_ONCE(old_reader_flavor_mask != reader_flavor_mask, "CPU %d old state %d new state %d\n", sdp->cpu, old_reader_flavor_mask, reader_flavor_mask); } -EXPORT_SYMBOL_GPL(srcu_check_nmi_safety); +EXPORT_SYMBOL_GPL(srcu_check_read_flavor); #endif /* CONFIG_PROVE_RCU */ /* |