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vdso: Remove remnants of architecture-specific time storage

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All users of the time releated parts of the vDSO are now using the generic
storage implementation. Remove the therefore unnecessary compatibility
accessor functions and symbols.

Co-developed-by: Nam Cao <namcao@linutronix.de>
Signed-off-by: Nam Cao <namcao@linutronix.de>
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250204-vdso-store-rng-v3-18-13a4669dfc8c@linutronix.de
This commit is contained in:
Thomas Weißschuh
2025-02-04 13:05:50 +01:00
committed by Thomas Gleixner
parent 998a8a2608
commit ac1a42f4e4
8 changed files with 53 additions and 89 deletions
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19
include/vdso/datapage.h
View File

@@ -128,8 +128,6 @@ struct vdso_time_data {
struct arch_vdso_time_data arch_data;
};
#define vdso_data vdso_time_data
/**
* struct vdso_rng_data - vdso RNG state information
* @generation: counter representing the number of RNG reseeds
@@ -149,10 +147,7 @@ struct vdso_rng_data {
* With the hidden visibility, the compiler simply generates a PC-relative
* relocation, and this is what we need.
*/
#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")));
#else
#ifdef CONFIG_GENERIC_VDSO_DATA_STORE
extern struct vdso_time_data vdso_u_time_data[CS_BASES] __attribute__((visibility("hidden")));
extern struct vdso_rng_data vdso_u_rng_data __attribute__((visibility("hidden")));
extern struct vdso_arch_data vdso_u_arch_data __attribute__((visibility("hidden")));
@@ -160,17 +155,6 @@ extern struct vdso_arch_data vdso_u_arch_data __attribute__((visibility("hidden"
extern struct vdso_time_data *vdso_k_time_data;
extern struct vdso_rng_data *vdso_k_rng_data;
extern struct vdso_arch_data *vdso_k_arch_data;
#endif
/**
* union vdso_data_store - Generic vDSO data page
*/
union vdso_data_store {
struct vdso_time_data data[CS_BASES];
u8 page[1U << CONFIG_PAGE_SHIFT];
};
#ifdef CONFIG_GENERIC_VDSO_DATA_STORE
#define VDSO_ARCH_DATA_SIZE ALIGN(sizeof(struct vdso_arch_data), PAGE_SIZE)
#define VDSO_ARCH_DATA_PAGES (VDSO_ARCH_DATA_SIZE >> PAGE_SHIFT)
@@ -189,7 +173,6 @@ enum vdso_pages {
/*
* The generic vDSO implementation requires that gettimeofday.h
* provides:
* - __arch_get_vdso_data(): to get the vdso datapage.
* - __arch_get_hw_counter(): to get the hw counter based on the
* clock_mode.
* - gettimeofday_fallback(): fallback for gettimeofday.

8
include/vdso/helpers.h
View File

@@ -7,7 +7,7 @@
#include <asm/barrier.h>
#include <vdso/datapage.h>
static __always_inline u32 vdso_read_begin(const struct vdso_data *vd)
static __always_inline u32 vdso_read_begin(const struct vdso_time_data *vd)
{
u32 seq;
@@ -18,7 +18,7 @@ static __always_inline u32 vdso_read_begin(const struct vdso_data *vd)
return seq;
}
static __always_inline u32 vdso_read_retry(const struct vdso_data *vd,
static __always_inline u32 vdso_read_retry(const struct vdso_time_data *vd,
u32 start)
{
u32 seq;
@@ -28,7 +28,7 @@ static __always_inline u32 vdso_read_retry(const struct vdso_data *vd,
return seq != start;
}
static __always_inline void vdso_write_begin(struct vdso_data *vd)
static __always_inline void vdso_write_begin(struct vdso_time_data *vd)
{
/*
* WRITE_ONCE() is required otherwise the compiler can validly tear
@@ -40,7 +40,7 @@ static __always_inline void vdso_write_begin(struct vdso_data *vd)
smp_wmb();
}
static __always_inline void vdso_write_end(struct vdso_data *vd)
static __always_inline void vdso_write_end(struct vdso_time_data *vd)
{
smp_wmb();
/*