Automatic merge of 'topic/vdso' into merge-test (2024-11-04 17:03)

Author: mpe

arch/Kconfig

@@ -1528,7 +1528,7 @@ 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/alpha/include/asm/page.h

@@ -4,11 +4,7 @@
 
 #include <linux/const.h>
 #include <asm/pal.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>
 
 #ifndef __ASSEMBLY__
 

arch/arc/include/uapi/asm/page.h

@@ -14,7 +14,7 @@
 
 /* PAGE_SHIFT determines the page size */
 #ifdef __KERNEL__
-#define PAGE_SHIFT CONFIG_PAGE_SHIFT
+#include <vdso/page.h>
 #else
 /*
  * Default 8k
@@ -24,11 +24,10 @@
  * not available
  */
 #define PAGE_SHIFT 13
+#define PAGE_SIZE	_BITUL(PAGE_SHIFT)	/* Default 8K */
+#define PAGE_MASK	(~(PAGE_SIZE-1))
 #endif
 
-#define PAGE_SIZE	_BITUL(PAGE_SHIFT)	/* Default 8K */
 #define PAGE_OFFSET	_AC(0x80000000, UL)	/* Kernel starts at 2G onwrds */
 
-#define PAGE_MASK	(~(PAGE_SIZE-1))
-
 #endif /* _UAPI__ASM_ARC_PAGE_H */

arch/arm/include/asm/page.h

@@ -7,10 +7,7 @@
 #ifndef _ASMARM_PAGE_H
 #define _ASMARM_PAGE_H
 
-/* PAGE_SHIFT determines the page size */
-#define PAGE_SHIFT		CONFIG_PAGE_SHIFT
-#define PAGE_SIZE		(_AC(1,UL) << PAGE_SHIFT)
-#define PAGE_MASK		(~((1 << PAGE_SHIFT) - 1))
+#include <vdso/page.h>
 
 #ifndef __ASSEMBLY__
 

arch/arm/include/asm/vdso/gettimeofday.h

@@ -15,8 +15,6 @@
 
 #define VDSO_HAS_CLOCK_GETRES		1
 
-extern struct vdso_data *__get_datapage(void);
-
 static __always_inline int gettimeofday_fallback(
 				struct __kernel_old_timeval *_tv,
 				struct timezone *_tz)
@@ -139,7 +137,7 @@ static __always_inline u64 __arch_get_hw_counter(int clock_mode,
 
 static __always_inline const struct vdso_data *__arch_get_vdso_data(void)
 {
-	return __get_datapage();
+	return _vdso_data;
 }
 
 #endif /* !__ASSEMBLY__ */

arch/arm/include/asm/vdso/vsyscall.h

@@ -4,16 +4,12 @@
 
 #ifndef __ASSEMBLY__
 
-#include <linux/timekeeper_internal.h>
 #include <vdso/datapage.h>
 #include <asm/cacheflush.h>
 
 extern struct vdso_data *vdso_data;
 extern bool cntvct_ok;
 
-/*
- * Update the vDSO data page to keep in sync with kernel timekeeping.
- */
 static __always_inline
 struct vdso_data *__arm_get_k_vdso_data(void)
 {

arch/arm/kernel/vdso.c

@@ -14,7 +14,6 @@
 #include <linux/of.h>
 #include <linux/printk.h>
 #include <linux/slab.h>
-#include <linux/timekeeper_internal.h>
 #include <linux/vmalloc.h>
 #include <asm/arch_timer.h>
 #include <asm/barrier.h>

arch/arm/vdso/Makefile

@@ -5,7 +5,7 @@ include $(srctree)/lib/vdso/Makefile
 
 hostprogs := vdsomunge
 
-obj-vdso := vgettimeofday.o datapage.o note.o
+obj-vdso := vgettimeofday.o note.o
 
 # Build rules
 targets := $(obj-vdso) vdso.so vdso.so.dbg vdso.so.raw vdso.lds

arch/arm/vdso/datapage.S

@@ -11,6 +11,7 @@
  */
 
 #include <linux/const.h>
+#include <asm/asm-offsets.h>
 #include <asm/page.h>
 #include <asm/vdso.h>
 
@@ -19,7 +20,7 @@ OUTPUT_ARCH(arm)
 
 SECTIONS
 {
-	PROVIDE(_start = .);
+	PROVIDE(_vdso_data = . - VDSO_DATA_SIZE);
 
 	. = SIZEOF_HEADERS;