netdev - [PATCH RFC net-next 16/34] jump_label: export static_key_slow_{inc,dec}

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Message-ID: <20231223025554.2316836-17-aleksander.lobakin@intel.com>
Date: Sat, 23 Dec 2023 03:55:36 +0100
From: Alexander Lobakin <aleksander.lobakin@...el.com>
To: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>
Cc: Alexander Lobakin <aleksander.lobakin@...el.com>,
	Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
	Michal Kubiak <michal.kubiak@...el.com>,
	Larysa Zaremba <larysa.zaremba@...el.com>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Willem de Bruijn <willemdebruijn.kernel@...il.com>,
	intel-wired-lan@...ts.osuosl.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH RFC net-next 16/34] jump_label: export static_key_slow_{inc,dec}_cpuslocked()

Sometimes, there's a need to modify a lot of static keys or modify the
same key multiple times in a loop. In that case, it seems more optimal
to lock cpu_read_lock once and then call _cpuslocked() variants.
The enable/disable functions are already exported, the refcounted
counterparts however are not. Fix that to allow modules to save some
cycles.

Signed-off-by: Alexander Lobakin <aleksander.lobakin@...el.com>
---
 kernel/jump_label.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/jump_label.c b/kernel/jump_label.c
index d9c822bbffb8..f0375372b484 100644
--- a/kernel/jump_label.c
+++ b/kernel/jump_label.c
@@ -177,6 +177,7 @@ bool static_key_slow_inc_cpuslocked(struct static_key *key)
 	jump_label_unlock();
 	return true;
 }
+EXPORT_SYMBOL_GPL(static_key_slow_inc_cpuslocked);
 
 bool static_key_slow_inc(struct static_key *key)
 {
@@ -304,6 +305,7 @@ void static_key_slow_dec_cpuslocked(struct static_key *key)
 	STATIC_KEY_CHECK_USE(key);
 	__static_key_slow_dec_cpuslocked(key);
 }
+EXPORT_SYMBOL_GPL(static_key_slow_dec_cpuslocked);
 
 void __static_key_slow_dec_deferred(struct static_key *key,
 				    struct delayed_work *work,
-- 
2.43.0