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lib/vdso: Cleanup clock mode storage leftovers

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Now that all architectures are converted to use the generic storage the
helpers and conditionals can be removed.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Link: https://lkml.kernel.org/r/20200207124403.470699892@linutronix.de
This commit is contained in:
Thomas Gleixner 2020-02-07 13:38:59 +01:00
parent 5e3c6a312a
commit f86fd32db7
9 changed files with 7 additions and 32 deletions
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1
arch/arm/mm/Kconfig
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@ -900,7 +900,6 @@ config VDSO
select GENERIC_TIME_VSYSCALL
select GENERIC_VDSO_32
select GENERIC_GETTIMEOFDAY
select GENERIC_VDSO_CLOCK_MODE
help
Place in the process address space an ELF shared object
providing fast implementations of gettimeofday and

1
arch/arm64/Kconfig
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@ -110,7 +110,6 @@ config ARM64
select GENERIC_STRNLEN_USER
select GENERIC_TIME_VSYSCALL
select GENERIC_GETTIMEOFDAY
select GENERIC_VDSO_CLOCK_MODE
select HANDLE_DOMAIN_IRQ
select HARDIRQS_SW_RESEND
select HAVE_PCI

1
arch/mips/Kconfig
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@ -37,7 +37,6 @@ config MIPS
select GENERIC_SCHED_CLOCK if !CAVIUM_OCTEON_SOC
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL
select GENERIC_VDSO_CLOCK_MODE
select GUP_GET_PTE_LOW_HIGH if CPU_MIPS32 && PHYS_ADDR_T_64BIT
select HANDLE_DOMAIN_IRQ
select HAVE_ARCH_COMPILER_H

1
arch/x86/Kconfig
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@ -125,7 +125,6 @@ config X86
select GENERIC_STRNLEN_USER
select GENERIC_TIME_VSYSCALL
select GENERIC_GETTIMEOFDAY
select GENERIC_VDSO_CLOCK_MODE
select GENERIC_VDSO_TIME_NS
select GUP_GET_PTE_LOW_HIGH if X86_PAE
select HARDLOCKUP_CHECK_TIMESTAMP if X86_64

7
include/asm-generic/vdso/vsyscall.h
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@ -18,13 +18,6 @@ static __always_inline bool __arch_update_vdso_data(void)
}
#endif /* __arch_update_vdso_data */
#ifndef __arch_get_clock_mode
static __always_inline int __arch_get_clock_mode(struct timekeeper *tk)
{
return 0;
}
#endif /* __arch_get_clock_mode */
#ifndef __arch_update_vsyscall
static __always_inline void __arch_update_vsyscall(struct vdso_data *vdata,
struct timekeeper *tk)

4
include/linux/clocksource.h
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@ -24,13 +24,13 @@ struct clocksource;
struct module;
#if defined(CONFIG_ARCH_CLOCKSOURCE_DATA) || \
defined(CONFIG_GENERIC_VDSO_CLOCK_MODE)
defined(CONFIG_GENERIC_GETTIMEOFDAY)
#include <asm/clocksource.h>
#endif
enum vdso_clock_mode {
VDSO_CLOCKMODE_NONE,
#ifdef CONFIG_GENERIC_VDSO_CLOCK_MODE
#ifdef CONFIG_GENERIC_GETTIMEOFDAY
VDSO_ARCH_CLOCKMODES,
#endif
VDSO_CLOCKMODE_MAX,

4
kernel/time/vsyscall.c
View File

@ -77,11 +77,7 @@ void update_vsyscall(struct timekeeper *tk)
/* copy vsyscall data */
vdso_write_begin(vdata);
#ifdef CONFIG_GENERIC_VDSO_CLOCK_MODE
clock_mode = tk->tkr_mono.clock->vdso_clock_mode;
#else
clock_mode = __arch_get_clock_mode(tk);
#endif
vdata[CS_HRES_COARSE].clock_mode = clock_mode;
vdata[CS_RAW].clock_mode = clock_mode;

3
lib/vdso/Kconfig
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@ -30,7 +30,4 @@ config GENERIC_VDSO_TIME_NS
Selected by architectures which support time namespaces in the
VDSO
config GENERIC_VDSO_CLOCK_MODE
bool
endif

17
lib/vdso/gettimeofday.c
View File

@ -65,16 +65,13 @@ static int do_hres_timens(const struct vdso_data *vdns, clockid_t clk,
do {
seq = vdso_read_begin(vd);
if (IS_ENABLED(CONFIG_GENERIC_VDSO_CLOCK_MODE) &&
vd->clock_mode == VDSO_CLOCKMODE_NONE)
if (unlikely(vd->clock_mode == VDSO_CLOCKMODE_NONE))
return -1;
cycles = __arch_get_hw_counter(vd->clock_mode);
ns = vdso_ts->nsec;
last = vd->cycle_last;
if (!IS_ENABLED(CONFIG_GENERIC_VDSO_CLOCK_MODE) &&
unlikely((s64)cycles < 0))
return -1;
ns += vdso_calc_delta(cycles, last, vd->mask, vd->mult);
ns >>= vd->shift;
sec = vdso_ts->sec;
@ -137,16 +134,12 @@ static __always_inline int do_hres(const struct vdso_data *vd, clockid_t clk,
}
smp_rmb();
if (IS_ENABLED(CONFIG_GENERIC_VDSO_CLOCK_MODE) &&
vd->clock_mode == VDSO_CLOCKMODE_NONE)
if (unlikely(vd->clock_mode == VDSO_CLOCKMODE_NONE))
return -1;
cycles = __arch_get_hw_counter(vd->clock_mode);
ns = vdso_ts->nsec;
last = vd->cycle_last;
if (!IS_ENABLED(CONFIG_GENERIC_VDSO_CLOCK_MODE) &&
unlikely((s64)cycles < 0))
return -1;
ns += vdso_calc_delta(cycles, last, vd->mask, vd->mult);
ns >>= vd->shift;
sec = vdso_ts->sec;