The following commit has been merged into the timers/urgent branch of tip:

Commit-ID:     3f7fbde4cdd4a25c199a60849897459a63907ca5
Gitweb:        https://git.kernel.org/tip/3f7fbde4cdd4a25c199a60849897459a63907ca5
Author:        Thomas Weißschuh <thomas.weissschuh@linutronix.de>
AuthorDate:    Wed, 13 May 2026 08:32:46 +02:00
Committer:     Thomas Gleixner <tglx@kernel.org>
CommitterDate: Tue, 02 Jun 2026 21:39:29 +02:00

vdso/datastore: Mark vdso_k_*_data pointers as __ro_after_init

These pointers are only modified once in vdso_setup_data_pages(),
during the init phase. Make them read-only after that.

Drop __refdata as that would conflict with __ro_after_init.
Modpost does accept the reference from a __ro_after_init symbol to
an __init one.

Fixes: 05988dba1179 ("vdso/datastore: Allocate data pages dynamically")
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260513-vdso-ro-after-init-v1-1-4b51f74015a4@linutronix.de
---
 lib/vdso/datastore.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/vdso/datastore.c b/lib/vdso/datastore.c
index cf5d784..17d37b8 100644
--- a/lib/vdso/datastore.c
+++ b/lib/vdso/datastore.c
@@ -11,21 +11,21 @@
 static u8 vdso_initdata[VDSO_NR_PAGES * PAGE_SIZE] __aligned(PAGE_SIZE) __initdata = {};
 
 #ifdef CONFIG_GENERIC_GETTIMEOFDAY
-struct vdso_time_data *vdso_k_time_data __refdata =
+struct vdso_time_data *vdso_k_time_data __ro_after_init =
 	(void *)&vdso_initdata[VDSO_TIME_PAGE_OFFSET * PAGE_SIZE];
 
 static_assert(sizeof(struct vdso_time_data) <= PAGE_SIZE);
 #endif /* CONFIG_GENERIC_GETTIMEOFDAY */
 
 #ifdef CONFIG_VDSO_GETRANDOM
-struct vdso_rng_data *vdso_k_rng_data __refdata =
+struct vdso_rng_data *vdso_k_rng_data __ro_after_init =
 	(void *)&vdso_initdata[VDSO_RNG_PAGE_OFFSET * PAGE_SIZE];
 
 static_assert(sizeof(struct vdso_rng_data) <= PAGE_SIZE);
 #endif /* CONFIG_VDSO_GETRANDOM */
 
 #ifdef CONFIG_ARCH_HAS_VDSO_ARCH_DATA
-struct vdso_arch_data *vdso_k_arch_data __refdata =
+struct vdso_arch_data *vdso_k_arch_data __ro_after_init =
 	(void *)&vdso_initdata[VDSO_ARCH_PAGES_START * PAGE_SIZE];
 #endif /* CONFIG_ARCH_HAS_VDSO_ARCH_DATA */