linux-kernel - [RFC PATCH 05/15] turn signal

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Message-ID: <20260110040217.1927971-6-viro@zeniv.linux.org.uk>
Date: Sat, 10 Jan 2026 04:02:07 +0000
From: Al Viro <viro@...iv.linux.org.uk>
To: linux-mm@...ck.org
Cc: Vlastimil Babka <vbabka@...e.cz>,
	Harry Yoo <harry.yoo@...cle.com>,
	linux-fsdevel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Christian Brauner <brauner@...nel.org>,
	Jan Kara <jack@...e.cz>,
	Mateusz Guzik <mguzik@...il.com>,
	linux-kernel@...r.kernel.org
Subject: [RFC PATCH 05/15] turn signal_cache static-duration

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
 kernel/fork.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/fork.c b/kernel/fork.c
index ddd2558f9431..23ed80d0d6d0 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -465,7 +465,8 @@ void thread_stack_cache_init(void)
 #endif /* CONFIG_VMAP_STACK */
 
 /* SLAB cache for signal_struct structures (tsk->signal) */
-static struct kmem_cache *signal_cachep;
+static struct kmem_cache_opaque signal_cache;
+#define signal_cachep to_kmem_cache(&signal_cache)
 
 /* SLAB cache for sighand_struct structures (tsk->sighand) */
 struct kmem_cache *sighand_cachep;
@@ -3024,7 +3025,7 @@ void __init proc_caches_init(void)
 			sizeof(struct sighand_struct), 0,
 			SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_TYPESAFE_BY_RCU|
 			SLAB_ACCOUNT, sighand_ctor);
-	signal_cachep = kmem_cache_create("signal_cache",
+	kmem_cache_setup(signal_cachep, "signal_cache",
 			sizeof(struct signal_struct), 0,
 			SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_ACCOUNT,
 			NULL);
-- 
2.47.3