diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2020-02-07 13:38:57 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-02-17 20:12:16 +0100 |
| commit | e1bdb22ebe5363ed75ddedf836ca9f19e1195337 (patch) | |
| tree | 0ff39b2bb1d92f6f8c045f6dc0299f6b3b155651 /arch/mips/include | |
| parent | b95a8a27c300d1a39a4e36f63a518ef36e4b966c (diff) | |
mips: vdso: Use generic VDSO clock mode storage
Switch to the generic VDSO clock mode storage.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Link: https://lkml.kernel.org/r/20200207124403.244684017@linutronix.de
Diffstat (limited to 'arch/mips/include')
| -rw-r--r-- | arch/mips/include/asm/clocksource.h | 18 | ||||
| -rw-r--r-- | arch/mips/include/asm/vdso/gettimeofday.h | 30 | ||||
| -rw-r--r-- | arch/mips/include/asm/vdso/vsyscall.h | 9 |
3 files changed, 13 insertions, 44 deletions
diff --git a/arch/mips/include/asm/clocksource.h b/arch/mips/include/asm/clocksource.h index cab9ae9f1e14..de659cae0d4e 100644 --- a/arch/mips/include/asm/clocksource.h +++ b/arch/mips/include/asm/clocksource.h @@ -3,23 +3,11 @@ * Copyright (C) 2015 Imagination Technologies * Author: Alex Smith <alex.smith@imgtec.com> */ - #ifndef __ASM_CLOCKSOURCE_H #define __ASM_CLOCKSOURCE_H -#include <linux/types.h> - -/* VDSO clocksources. */ -#define VDSO_CLOCK_NONE 0 /* No suitable clocksource. */ -#define VDSO_CLOCK_R4K 1 /* Use the coprocessor 0 count. */ -#define VDSO_CLOCK_GIC 2 /* Use the GIC. */ - -/** - * struct arch_clocksource_data - Architecture-specific clocksource information. - * @vdso_clock_mode: Method the VDSO should use to access the clocksource. - */ -struct arch_clocksource_data { - u8 vdso_clock_mode; -}; +#define VDSO_ARCH_CLOCKMODES \ + VDSO_CLOCKMODE_R4K, \ + VDSO_CLOCKMODE_GIC #endif /* __ASM_CLOCKSOURCE_H */ diff --git a/arch/mips/include/asm/vdso/gettimeofday.h b/arch/mips/include/asm/vdso/gettimeofday.h index a9f846b1a920..88c3de1bdf22 100644 --- a/arch/mips/include/asm/vdso/gettimeofday.h +++ b/arch/mips/include/asm/vdso/gettimeofday.h @@ -24,8 +24,6 @@ #define VDSO_HAS_CLOCK_GETRES 1 -#define __VDSO_USE_SYSCALL ULLONG_MAX - static __always_inline long gettimeofday_fallback( struct __kernel_old_timeval *_tv, struct timezone *_tz) @@ -175,28 +173,20 @@ static __always_inline u64 read_gic_count(const struct vdso_data *data) static __always_inline u64 __arch_get_hw_counter(s32 clock_mode) { -#ifdef CONFIG_CLKSRC_MIPS_GIC - const struct vdso_data *data = get_vdso_data(); -#endif - u64 cycle_now; - - switch (clock_mode) { #ifdef CONFIG_CSRC_R4K - case VDSO_CLOCK_R4K: - cycle_now = read_r4k_count(); - break; + if (clock_mode == VDSO_CLOCKMODE_R4K) + return read_r4k_count(); #endif #ifdef CONFIG_CLKSRC_MIPS_GIC - case VDSO_CLOCK_GIC: - cycle_now = read_gic_count(data); - break; + if (clock_mode == VDSO_CLOCKMODE_GIC) + return read_gic_count(get_vdso_data()); #endif - default: - cycle_now = __VDSO_USE_SYSCALL; - break; - } - - return cycle_now; + /* + * Core checks mode already. So this raced against a concurrent + * update. Return something. Core will do another round see the + * change and fallback to syscall. + */ + return 0; } static inline bool mips_vdso_hres_capable(void) diff --git a/arch/mips/include/asm/vdso/vsyscall.h b/arch/mips/include/asm/vdso/vsyscall.h index 00d41b94ba31..47168aaf1eff 100644 --- a/arch/mips/include/asm/vdso/vsyscall.h +++ b/arch/mips/include/asm/vdso/vsyscall.h @@ -19,15 +19,6 @@ struct vdso_data *__mips_get_k_vdso_data(void) } #define __arch_get_k_vdso_data __mips_get_k_vdso_data -static __always_inline -int __mips_get_clock_mode(struct timekeeper *tk) -{ - u32 clock_mode = tk->tkr_mono.clock->archdata.vdso_clock_mode; - - return clock_mode; -} -#define __arch_get_clock_mode __mips_get_clock_mode - /* The asm-generic header needs to be included after the definitions above */ #include <asm-generic/vdso/vsyscall.h> |