Merge tag 'timers-vdso-2024-11-18' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull vdso data page handling updates from Thomas Gleixner:
 "First steps of consolidating the VDSO data page handling.

  The VDSO data page handling is architecture specific for historical
  reasons, but there is no real technical reason to do so.

  Aside of that VDSO data has become a dump ground for various
  mechanisms and fail to provide a clear separation of the
  functionalities.

  Clean this up by:

   - consolidating the VDSO page data by getting rid of architecture
     specific warts especially in x86 and PowerPC.

   - removing the last includes of header files which are pulling in
     other headers outside of the VDSO namespace.

   - seperating timekeeping and other VDSO data accordingly.

  Further consolidation of the VDSO page handling is done in subsequent
  changes scheduled for the next merge window.

  This also lays the ground for expanding the VDSO time getters for
  independent PTP clocks in a generic way without making every
  architecture add support seperately"

* tag 'timers-vdso-2024-11-18' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (42 commits)
  x86/vdso: Add missing brackets in switch case
  vdso: Rename struct arch_vdso_data to arch_vdso_time_data
  powerpc: Split systemcfg struct definitions out from vdso
  powerpc: Split systemcfg data out of vdso data page
  powerpc: Add kconfig option for the systemcfg page
  powerpc/pseries/lparcfg: Use num_possible_cpus() for potential processors
  powerpc/pseries/lparcfg: Fix printing of system_active_processors
  powerpc/procfs: Propagate error of remap_pfn_range()
  powerpc/vdso: Remove offset comment from 32bit vdso_arch_data
  x86/vdso: Split virtual clock pages into dedicated mapping
  x86/vdso: Delete vvar.h
  x86/vdso: Access vdso data without vvar.h
  x86/vdso: Move the rng offset to vsyscall.h
  x86/vdso: Access rng vdso data without vvar.h
  x86/vdso: Access timens vdso data without vvar.h
  x86/vdso: Allocate vvar page from C code
  x86/vdso: Access rng data from kernel without vvar
  x86/vdso: Place vdso_data at beginning of vvar page
  x86/vdso: Use __arch_get_vdso_data() to access vdso data
  x86/mm/mmap: Remove arch_vma_name()
  ...

3 files changed, 3 insertions, 14 deletions

diff --git a/arch/arm64/include/asm/page-def.h b/arch/arm64/include/asm/page-def.h
index 792e9fe881dc..d402e08442ee 100644
--- a/arch/arm64/include/asm/page-def.h
+++ b/arch/arm64/include/asm/page-def.h
@@ -10,9 +10,6 @@
 
 #include <linux/const.h>
 
-/* PAGE_SHIFT determines the page size */
-#define PAGE_SHIFT		CONFIG_PAGE_SHIFT
-#define PAGE_SIZE		(_AC(1, UL) << PAGE_SHIFT)
-#define PAGE_MASK		(~(PAGE_SIZE-1))
+#include <vdso/page.h>
 
 #endif /* __ASM_PAGE_DEF_H */
diff --git a/arch/arm64/include/asm/vdso.h b/arch/arm64/include/asm/vdso.h
index 4305995c8f82..3e3c3fdb1842 100644
--- a/arch/arm64/include/asm/vdso.h
+++ b/arch/arm64/include/asm/vdso.h
@@ -5,13 +5,6 @@
 #ifndef __ASM_VDSO_H
 #define __ASM_VDSO_H
 
-/*
- * Default link address for the vDSO.
- * Since we randomise the VDSO mapping, there's little point in trying
- * to prelink this.
- */
-#define VDSO_LBASE	0x0
-
 #define __VVAR_PAGES    2
 
 #ifndef __ASSEMBLY__
@@ -20,7 +13,7 @@
 
 #define VDSO_SYMBOL(base, name)						   \
 ({									   \
-	(void *)(vdso_offset_##name - VDSO_LBASE + (unsigned long)(base)); \
+	(void *)(vdso_offset_##name + (unsigned long)(base)); \
 })
 
 extern char vdso_start[], vdso_end[];
diff --git a/arch/arm64/include/asm/vdso/vsyscall.h b/arch/arm64/include/asm/vdso/vsyscall.h
index 5b6d0dd3cef5..eea51946d45a 100644
--- a/arch/arm64/include/asm/vdso/vsyscall.h
+++ b/arch/arm64/include/asm/vdso/vsyscall.h
@@ -6,7 +6,6 @@
 
 #ifndef __ASSEMBLY__
 
-#include <linux/timekeeper_internal.h>
 #include <vdso/datapage.h>
 
 enum vvar_pages {
@@ -37,7 +36,7 @@ struct vdso_rng_data *__arm64_get_k_vdso_rnd_data(void)
 #define __arch_get_k_vdso_rng_data __arm64_get_k_vdso_rnd_data
 
 static __always_inline
-void __arm64_update_vsyscall(struct vdso_data *vdata, struct timekeeper *tk)
+void __arm64_update_vsyscall(struct vdso_data *vdata)
 {
 	vdata[CS_HRES_COARSE].mask	= VDSO_PRECISION_MASK;
 	vdata[CS_RAW].mask		= VDSO_PRECISION_MASK;