linux-kernel - [PATCH net-next 11/12] jump_label: export static_key_slow_{inc,dec}

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Message-ID: <20241211172649.761483-12-aleksander.lobakin@intel.com>
Date: Wed, 11 Dec 2024 18:26:48 +0100
From: Alexander Lobakin <aleksander.lobakin@...el.com>
To: Andrew Lunn <andrew+netdev@...n.ch>,
	"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>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	John Fastabend <john.fastabend@...il.com>,
	Andrii Nakryiko <andrii@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Josh Poimboeuf <jpoimboe@...nel.org>,
	"Jose E. Marchesi" <jose.marchesi@...cle.com>,
	Toke Høiland-Jørgensen <toke@...hat.com>,
	Magnus Karlsson <magnus.karlsson@...el.com>,
	Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
	Przemek Kitszel <przemyslaw.kitszel@...el.com>,
	Jason Baron <jbaron@...mai.com>,
	Casey Schaufler <casey@...aufler-ca.com>,
	Nathan Chancellor <nathan@...nel.org>,
	nex.sw.ncis.osdt.itp.upstreaming@...el.com,
	bpf@...r.kernel.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH net-next 11/12] 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 93a822d3c468..1034c0348995 100644
--- a/kernel/jump_label.c
+++ b/kernel/jump_label.c
@@ -182,6 +182,7 @@ bool static_key_slow_inc_cpuslocked(struct static_key *key)
 	}
 	return true;
 }
+EXPORT_SYMBOL_GPL(static_key_slow_inc_cpuslocked);
 
 bool static_key_slow_inc(struct static_key *key)
 {
@@ -342,6 +343,7 @@ 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,
-- 
2.47.1