vdso: Rename struct arch_vdso_data to arch_vdso_time_data

The struct arch_vdso_data is only about vdso time data. So rename it to
arch_vdso_time_data to make it obvious.
Non time-related data will be migrated out of these structs soon.

Signed-off-by: Nam Cao <namcao@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Heiko Carstens <hca@linux.ibm.com> # s390
Link: https://lore.kernel.org/all/20241010-vdso-generic-base-v1-28-b64f0842d512@linutronix.de

Author: covanam

arch/Kconfig

@@ -1530,7 +1530,7 @@ config HAVE_SPARSE_SYSCALL_NR
 	  entries at 4000, 5000 and 6000 locations. This option turns on syscall
 	  related optimizations for a given architecture.
 
-config ARCH_HAS_VDSO_DATA
+config ARCH_HAS_VDSO_TIME_DATA
 	bool
 
 config HAVE_STATIC_CALL

arch/riscv/Kconfig

@@ -50,7 +50,7 @@ config RISCV
 	select ARCH_HAS_SYSCALL_WRAPPER
 	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
 	select ARCH_HAS_UBSAN
-	select ARCH_HAS_VDSO_DATA
+	select ARCH_HAS_VDSO_TIME_DATA
 	select ARCH_KEEP_MEMBLOCK if ACPI
 	select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE	if 64BIT && MMU
 	select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX

arch/riscv/include/asm/vdso/data.h renamed to arch/riscv/include/asm/vdso/time_data.h

@@ -1,17 +1,17 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __RISCV_ASM_VDSO_DATA_H
-#define __RISCV_ASM_VDSO_DATA_H
+#ifndef __RISCV_ASM_VDSO_TIME_DATA_H
+#define __RISCV_ASM_VDSO_TIME_DATA_H
 
 #include <linux/types.h>
 #include <vdso/datapage.h>
 #include <asm/hwprobe.h>
 
-struct arch_vdso_data {
+struct arch_vdso_time_data {
 	/* Stash static answers to the hwprobe queries when all CPUs are selected. */
 	__u64 all_cpu_hwprobe_values[RISCV_HWPROBE_MAX_KEY + 1];
 
 	/* Boolean indicating all CPUs have the same static hwprobe values. */
 	__u8 homogeneous_cpus;
 };
 
-#endif /* __RISCV_ASM_VDSO_DATA_H */
+#endif /* __RISCV_ASM_VDSO_TIME_DATA_H */

arch/riscv/kernel/sys_hwprobe.c

@@ -402,7 +402,7 @@ static int do_riscv_hwprobe(struct riscv_hwprobe __user *pairs,
 static int __init init_hwprobe_vdso_data(void)
 {
 	struct vdso_data *vd = __arch_get_k_vdso_data();
-	struct arch_vdso_data *avd = &vd->arch_data;
+	struct arch_vdso_time_data *avd = &vd->arch_data;
 	u64 id_bitsmash = 0;
 	struct riscv_hwprobe pair;
 	int key;

arch/riscv/kernel/vdso/hwprobe.c

@@ -17,7 +17,7 @@ static int riscv_vdso_get_values(struct riscv_hwprobe *pairs, size_t pair_count,
 				 unsigned int flags)
 {
 	const struct vdso_data *vd = __arch_get_vdso_data();
-	const struct arch_vdso_data *avd = &vd->arch_data;
+	const struct arch_vdso_time_data *avd = &vd->arch_data;
 	bool all_cpus = !cpusetsize && !cpus;
 	struct riscv_hwprobe *p = pairs;
 	struct riscv_hwprobe *end = pairs + pair_count;
@@ -52,7 +52,7 @@ static int riscv_vdso_get_cpus(struct riscv_hwprobe *pairs, size_t pair_count,
 			       unsigned int flags)
 {
 	const struct vdso_data *vd = __arch_get_vdso_data();
-	const struct arch_vdso_data *avd = &vd->arch_data;
+	const struct arch_vdso_time_data *avd = &vd->arch_data;
 	struct riscv_hwprobe *p = pairs;
 	struct riscv_hwprobe *end = pairs + pair_count;
 	unsigned char *c = (unsigned char *)cpus;

arch/s390/Kconfig

@@ -88,7 +88,7 @@ config S390
 	select ARCH_HAS_STRICT_MODULE_RWX
 	select ARCH_HAS_SYSCALL_WRAPPER
 	select ARCH_HAS_UBSAN
-	select ARCH_HAS_VDSO_DATA
+	select ARCH_HAS_VDSO_TIME_DATA
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select ARCH_INLINE_READ_LOCK
 	select ARCH_INLINE_READ_LOCK_BH

arch/s390/include/asm/vdso/data.h

@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __S390_ASM_VDSO_TIME_DATA_H
+#define __S390_ASM_VDSO_TIME_DATA_H
+
+#include <linux/types.h>
+
+struct arch_vdso_time_data {
+	__s64 tod_steering_delta;
+	__u64 tod_steering_end;
+};
+
+#endif /* __S390_ASM_VDSO_TIME_DATA_H */

arch/s390/include/asm/vdso/time_data.h

@@ -19,10 +19,10 @@
 #include <vdso/time32.h>
 #include <vdso/time64.h>
 
-#ifdef CONFIG_ARCH_HAS_VDSO_DATA
-#include <asm/vdso/data.h>
+#ifdef CONFIG_ARCH_HAS_VDSO_TIME_DATA
+#include <asm/vdso/time_data.h>
 #else
-struct arch_vdso_data {};
+struct arch_vdso_time_data {};
 #endif
 
 #define VDSO_BASES	(CLOCK_TAI + 1)
@@ -114,7 +114,7 @@ struct vdso_data {
 	u32			hrtimer_res;
 	u32			__unused;
 
-	struct arch_vdso_data	arch_data;
+	struct arch_vdso_time_data arch_data;
 };
 
 /**