vdso: Rename HAVE_GENERIC_VDSO to VDSO_DATASTORE

Over time the meaning of HAVE_GENERIC_VDSO has become off.
Today it only controls the availability of the vDSO datastore.

Rename the symbol to match its function.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@oss.qualcomm.com>
Link: https://patch.msgid.link/20260709-vdso-have_generic_vdso-v1-6-d2e1061f268b@linutronix.de

arch/loongarch/Kconfig

@@ -153,7 +153,6 @@ config LOONGARCH
 	select HAVE_FUNCTION_GRAPH_TRACER
 	select HAVE_FUNCTION_TRACER
 	select HAVE_GCC_PLUGINS
-	select HAVE_GENERIC_VDSO
 	select HAVE_HW_BREAKPOINT if PERF_EVENTS
 	select HAVE_IOREMAP_PROT
 	select HAVE_IRQ_EXIT_ON_IRQ_STACK
@@ -213,6 +212,7 @@ config LOONGARCH
 	select TRACE_IRQFLAGS_SUPPORT
 	select USE_PERCPU_NUMA_NODE_ID
 	select USER_STACKTRACE_SUPPORT
+	select VDSO_DATASTORE
 	select VDSO_GETRANDOM
 	select ZONE_DMA32 if 64BIT
 

arch/powerpc/Kconfig

@@ -256,7 +256,6 @@ config PPC
 	select HAVE_FUNCTION_GRAPH_TRACER
 	select HAVE_FUNCTION_TRACER		if !COMPILE_TEST && (PPC64 || (PPC32 && CC_IS_GCC))
 	select HAVE_GCC_PLUGINS
-	select HAVE_GENERIC_VDSO
 	select HAVE_HARDLOCKUP_DETECTOR_ARCH	if PPC_BOOK3S_64 && SMP
 	select HAVE_HARDLOCKUP_DETECTOR_PERF	if PERF_EVENTS && HAVE_PERF_EVENTS_NMI
 	select HAVE_HW_BREAKPOINT		if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
@@ -328,6 +327,7 @@ config PPC
 	select SYSCTL_EXCEPTION_TRACE
 	select THREAD_INFO_IN_TASK
 	select TRACE_IRQFLAGS_SUPPORT
+	select VDSO_DATASTORE
 	select VDSO_GETRANDOM
 	#
 	# Please keep this list sorted alphabetically.

arch/riscv/Kconfig

@@ -171,7 +171,6 @@ config RISCV
 	select HAVE_FUNCTION_ARG_ACCESS_API
 	select HAVE_FUNCTION_ERROR_INJECTION
 	select HAVE_GCC_PLUGINS
-	select HAVE_GENERIC_VDSO if MMU
 	select HAVE_IRQ_TIME_ACCOUNTING
 	select HAVE_KERNEL_BZIP2 if !EFI_ZBOOT
 	select HAVE_KERNEL_GZIP if !EFI_ZBOOT
@@ -227,6 +226,7 @@ config RISCV
 	select THREAD_INFO_IN_TASK
 	select TRACE_IRQFLAGS_SUPPORT
 	select UACCESS_MEMCPY if !MMU
+	select VDSO_DATASTORE if MMU
 	select VDSO_GETRANDOM if MMU && 64BIT
 	select USER_STACKTRACE_SUPPORT
 	select ZONE_DMA32 if 64BIT

include/linux/vdso_datastore.h

@@ -7,10 +7,10 @@
 extern const struct vm_special_mapping vdso_vvar_mapping;
 struct vm_area_struct *vdso_install_vvar_mapping(struct mm_struct *mm, unsigned long addr);
 
-#ifdef CONFIG_HAVE_GENERIC_VDSO
+#ifdef CONFIG_VDSO_DATASTORE
 void __init vdso_setup_data_pages(void);
-#else /* !CONFIG_HAVE_GENERIC_VDSO */
+#else /* !CONFIG_VDSO_DATASTORE */
 static inline void vdso_setup_data_pages(void) { }
-#endif /* CONFIG_HAVE_GENERIC_VDSO */
+#endif /* CONFIG_VDSO_DATASTORE */
 
 #endif /* _LINUX_VDSO_DATASTORE_H */

lib/vdso/Kconfig

@@ -1,11 +1,11 @@
 # SPDX-License-Identifier: GPL-2.0
 
-config HAVE_GENERIC_VDSO
+config VDSO_DATASTORE
 	bool
 
 config GENERIC_GETTIMEOFDAY
 	bool
-	select HAVE_GENERIC_VDSO
+	select VDSO_DATASTORE
 	help
 	  This is a generic implementation of gettimeofday vdso.
 	  Each architecture that enables this feature has to
@@ -20,6 +20,6 @@ config GENERIC_VDSO_OVERFLOW_PROTECT
 
 config VDSO_GETRANDOM
 	bool
-	select HAVE_GENERIC_VDSO
+	select VDSO_DATASTORE
 	help
 	  Selected by architectures that support vDSO getrandom().

lib/vdso/Makefile

@@ -1,3 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
-obj-$(CONFIG_HAVE_GENERIC_VDSO) += datastore.o
+obj-$(CONFIG_VDSO_DATASTORE) += datastore.o