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fs: hide dentry_cache behind runtime const machinery

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Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://patch.msgid.link/20251105153622.758836-1-mjguzik@gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Mateusz Guzik
2025-11-05 16:36:22 +01:00
committed by Christian Brauner
parent e41c1f4291
commit 21b561dab1
2 changed files with 6 additions and 3 deletions
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6
fs/dcache.c
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@@ -86,7 +86,8 @@ __cacheline_aligned_in_smp DEFINE_SEQLOCK(rename_lock);
EXPORT_SYMBOL(rename_lock);
static struct kmem_cache *dentry_cache __ro_after_init;
static struct kmem_cache *__dentry_cache __ro_after_init;
#define dentry_cache runtime_const_ptr(__dentry_cache)
const struct qstr empty_name = QSTR_INIT("", 0);
EXPORT_SYMBOL(empty_name);
@@ -3222,9 +3223,10 @@ static void __init dcache_init(void)
* but it is probably not worth it because of the cache nature
* of the dcache.
*/
dentry_cache = KMEM_CACHE_USERCOPY(dentry,
__dentry_cache = KMEM_CACHE_USERCOPY(dentry,
SLAB_RECLAIM_ACCOUNT|SLAB_PANIC|SLAB_ACCOUNT,
d_shortname.string);
runtime_const_init(ptr, __dentry_cache);
/* Hash may have been set up in dcache_init_early */
if (!hashdist)

3
include/asm-generic/vmlinux.lds.h
View File

@@ -955,7 +955,8 @@ defined(CONFIG_AUTOFDO_CLANG) || defined(CONFIG_PROPELLER_CLANG)
#define RUNTIME_CONST_VARIABLES \
RUNTIME_CONST(shift, d_hash_shift) \
RUNTIME_CONST(ptr, dentry_hashtable)
RUNTIME_CONST(ptr, dentry_hashtable) \
RUNTIME_CONST(ptr, __dentry_cache)
/* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */
#define KUNIT_TABLE() \