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Message-Id: <20200207124403.470699892@linutronix.de>
Date: Fri, 07 Feb 2020 13:38:59 +0100
From: Thomas Gleixner <tglx@...utronix.de>
To: LKML <linux-kernel@...r.kernel.org>
Cc: x86@...nel.org, John Stultz <john.stultz@...aro.org>,
Vincenzo Frascino <vincenzo.frascino@....com>,
Andy Lutomirski <luto@...nel.org>,
Christophe Leroy <christophe.leroy@....fr>,
Paolo Bonzini <pbonzini@...hat.com>,
Juergen Gross <jgross@...e.com>,
Michael Kelley <mikelley@...rosoft.com>,
Sasha Levin <sashal@...nel.org>,
Ralf Baechle <ralf@...ux-mips.org>,
Paul Burton <paulburton@...nel.org>,
James Hogan <jhogan@...nel.org>,
Russell King <linux@...linux.org.uk>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Marc Zyngier <maz@...nel.org>, Andrei Vagin <avagin@...il.com>
Subject: [patch V2 12/17] lib/vdso: Cleanup clock mode storage leftovers
From: Thomas Gleixner <tglx@...utronix.de>
Now that all architectures are converted to use the generic storage the
helpers and conditionals can be removed.
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
arch/arm/mm/Kconfig | 1 -
arch/arm64/Kconfig | 1 -
arch/mips/Kconfig | 1 -
arch/x86/Kconfig | 1 -
include/asm-generic/vdso/vsyscall.h | 7 -------
include/linux/clocksource.h | 4 ++--
kernel/time/vsyscall.c | 4 ----
lib/vdso/Kconfig | 3 ---
lib/vdso/gettimeofday.c | 17 +++++------------
9 files changed, 7 insertions(+), 32 deletions(-)
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -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
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -109,7 +109,6 @@ 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
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -35,7 +35,6 @@ 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
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -124,7 +124,6 @@ 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
--- a/include/asm-generic/vdso/vsyscall.h
+++ b/include/asm-generic/vdso/vsyscall.h
@@ -18,13 +18,6 @@ static __always_inline bool __arch_updat
}
#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)
--- a/include/linux/clocksource.h
+++ b/include/linux/clocksource.h
@@ -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,
--- a/kernel/time/vsyscall.c
+++ b/kernel/time/vsyscall.c
@@ -77,11 +77,7 @@ void update_vsyscall(struct timekeeper *
/* 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;
--- a/lib/vdso/Kconfig
+++ b/lib/vdso/Kconfig
@@ -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
--- a/lib/vdso/gettimeofday.c
+++ b/lib/vdso/gettimeofday.c
@@ -65,16 +65,13 @@ static int do_hres_timens(const struct v
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
}
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;
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