Unverified Commit 21b561da authored by Mateusz Guzik's avatar Mateusz Guzik Committed by Christian Brauner
Browse files

fs: hide dentry_cache behind runtime const machinery 



Signed-off-by: default avatarMateusz Guzik <mjguzik@gmail.com>
Link: https://patch.msgid.link/20251105153622.758836-1-mjguzik@gmail.com


Signed-off-by: default avatarChristian Brauner <brauner@kernel.org>
parent e41c1f42

fs/dcache.c

+4 −2
Original line number Diff line number Diff line
@@ -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)

include/asm-generic/vmlinux.lds.h

+2 −1
Original line number Diff line number Diff line
@@ -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()							\