All users of the random vDSO are using the generic storage
implementation. Remove the now unnecessary compatibility accessor
functions and symbols.
Co-developed-by: Nam Cao <namcao@xxxxxxxxxxxxx>
Signed-off-by: Nam Cao <namcao@xxxxxxxxxxxxx>
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@xxxxxxxxxxxxx>
---
drivers/char/random.c | 6 +++---
include/vdso/datapage.h | 8 --------
lib/vdso/getrandom.c | 4 ++--
3 files changed, 5 insertions(+), 13 deletions(-)
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 23ee76bbb4aa728274bf9980a60b863216d88797..84efda7bede348401db2ed1c443e5ab2bc5dbd2b 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -278,7 +278,7 @@ static void crng_reseed(struct work_struct *work)
WRITE_ONCE(base_crng.generation, next_gen);
#ifdef CONFIG_VDSO_GETRANDOM
/* base_crng.generation's invalid value is ULONG_MAX, while
- * _vdso_rng_data.generation's invalid value is 0, so add one to the
+ * vdso_k_rng_data->generation's invalid value is 0, so add one to the
* former to arrive at the latter. Use smp_store_release so that this
* is ordered with the write above to base_crng.generation. Pairs with
* the smp_rmb() before the syscall in the vDSO code.
@@ -290,7 +290,7 @@ static void crng_reseed(struct work_struct *work)
* because the vDSO side only checks whether the value changed, without
* actually using or interpreting the value.
*/
- smp_store_release((unsigned long *)&__arch_get_k_vdso_rng_data()->generation, next_gen + 1);
+ smp_store_release((unsigned long *)&vdso_k_rng_data->generation, next_gen + 1);
#endif
if (!static_branch_likely(&crng_is_ready))
crng_init = CRNG_READY;
@@ -743,7 +743,7 @@ static void __cold _credit_init_bits(size_t bits)
queue_work(system_unbound_wq, &set_ready);
atomic_notifier_call_chain(&random_ready_notifier, 0, NULL);
#ifdef CONFIG_VDSO_GETRANDOM
- WRITE_ONCE(__arch_get_k_vdso_rng_data()->is_ready, true);
+ WRITE_ONCE(vdso_k_rng_data->is_ready, true);
#endif
wake_up_interruptible(&crng_init_wait);
kill_fasync(&fasync, SIGIO, POLL_IN);
diff --git a/include/vdso/datapage.h b/include/vdso/datapage.h
index b3227f1cf62895aa60ce0ca96afa42259f4771f9..0fc240c08e0f7cf596135eed18dd6f06011917d5 100644
--- a/include/vdso/datapage.h
+++ b/include/vdso/datapage.h
@@ -152,7 +152,6 @@ struct vdso_rng_data {
#ifndef CONFIG_GENERIC_VDSO_DATA_STORE
extern struct vdso_time_data _vdso_data[CS_BASES] __attribute__((visibility("hidden")));
extern struct vdso_time_data _timens_data[CS_BASES] __attribute__((visibility("hidden")));
-extern struct vdso_rng_data _vdso_rng_data __attribute__((visibility("hidden")));
#else
extern const struct vdso_time_data vdso_u_time_data[CS_BASES] __attribute__((visibility("hidden")));
extern const struct vdso_time_data vdso_u_timens_data[CS_BASES] __attribute__((visibility("hidden")));
@@ -211,13 +210,6 @@ static __always_inline const struct vdso_rng_data *__arch_get_vdso_u_rng_data(vo
{
return &vdso_u_rng_data;
}
-#define __arch_get_vdso_rng_data __arch_get_vdso_u_rng_data
-
-static __always_inline struct vdso_rng_data *__arch_get_vdso_k_rng_data(void)
-{
- return vdso_k_rng_data;
-}
-#define __arch_get_k_vdso_rng_data __arch_get_vdso_k_rng_data
#endif /* CONFIG_VDSO_GETRANDOM */
#endif /* CONFIG_GENERIC_VDSO_DATA_STORE */
diff --git a/lib/vdso/getrandom.c b/lib/vdso/getrandom.c
index 938ca539aaa64bc46280ef6dd17aa661126699eb..2ed019a76abca099de33326ef45101cf50f2f778 100644
--- a/lib/vdso/getrandom.c
+++ b/lib/vdso/getrandom.c
@@ -152,7 +152,7 @@ __cvdso_getrandom_data(const struct vdso_rng_data *rng_info, void *buffer, size_
/*
* Prevent the syscall from being reordered wrt current_generation. Pairs with the
- * smp_store_release(&_vdso_rng_data.generation) in random.c.
+ * smp_store_release(&vdso_k_rng_data.generation) in random.c.
*/
smp_rmb();
@@ -256,5 +256,5 @@ __cvdso_getrandom_data(const struct vdso_rng_data *rng_info, void *buffer, size_
static __always_inline ssize_t
__cvdso_getrandom(void *buffer, size_t len, unsigned int flags, void *opaque_state, size_t opaque_len)
{
- return __cvdso_getrandom_data(__arch_get_vdso_rng_data(), buffer, len, flags, opaque_state, opaque_len);
+ return __cvdso_getrandom_data(__arch_get_vdso_u_rng_data(), buffer, len, flags, opaque_state, opaque_len);
}
--
2.47.1
