From: Mateusz Guzik <mjguzik@gmail.com>
Date: Mon, 1 Dec 2025 08:32:26 +0000 (+0100)
Subject: fs: hide names_cache behind runtime const machinery
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7ca83f8ebe86706c4164ac21871f4a5adb86a430;p=thirdparty%2Fkernel%2Flinux.git

fs: hide names_cache behind runtime const machinery

s/names_cachep/names_cache/ for consistency with dentry cache.

Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/namei.c b/fs/namei.c
index 57043b81fe274..06d60808b0ff5 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -41,6 +41,8 @@
 #include <linux/init_task.h>
 #include <linux/uaccess.h>
 
+#include <asm/runtime-const.h>
+
 #include "internal.h"
 #include "mount.h"
 
@@ -124,23 +126,25 @@
  */
 
 /* SLAB cache for struct filename instances */
-static struct kmem_cache *names_cachep __ro_after_init;
+static struct kmem_cache *__names_cache __ro_after_init;
+#define names_cache	runtime_const_ptr(__names_cache)
 
 void __init filename_init(void)
 {
-	names_cachep = kmem_cache_create_usercopy("names_cache", sizeof(struct filename), 0,
-			SLAB_HWCACHE_ALIGN|SLAB_PANIC, offsetof(struct filename, iname),
-						EMBEDDED_NAME_MAX, NULL);
+	__names_cache = kmem_cache_create_usercopy("names_cache", sizeof(struct filename), 0,
+			 SLAB_HWCACHE_ALIGN|SLAB_PANIC, offsetof(struct filename, iname),
+			 EMBEDDED_NAME_MAX, NULL);
+	runtime_const_init(ptr, __names_cache);
 }
 
 static inline struct filename *alloc_filename(void)
 {
-	return kmem_cache_alloc(names_cachep, GFP_KERNEL);
+	return kmem_cache_alloc(names_cache, GFP_KERNEL);
 }
 
 static inline void free_filename(struct filename *p)
 {
-	kmem_cache_free(names_cachep, p);
+	kmem_cache_free(names_cache, p);
 }
 
 static inline void initname(struct filename *name)
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 8ca130af301fc..eeb070f330bdb 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -972,7 +972,8 @@
 #define RUNTIME_CONST_VARIABLES						\
 		RUNTIME_CONST(shift, d_hash_shift)			\
 		RUNTIME_CONST(ptr, dentry_hashtable)			\
-		RUNTIME_CONST(ptr, __dentry_cache)
+		RUNTIME_CONST(ptr, __dentry_cache)			\
+		RUNTIME_CONST(ptr, __names_cache)
 
 /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */
 #define KUNIT_TABLE()							\