Commit 052e76a3 authored by Vincenzo Frascino's avatar Vincenzo Frascino Committed by Russell King
Browse files

ARM: 8931/1: Add clock_getres entry point 



The generic vDSO library provides an implementation of clock_getres() that
can be leveraged by each architecture.

Add clock_getres() entry point on arm to be on pair with arm64.

Signed-off-by: default avatarVincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
parent 20e2fc42

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

+20 −0
Original line number Diff line number Diff line
@@ -12,6 +12,8 @@ 
#include <asm/unistd.h>

#include <uapi/linux/time.h>



#define VDSO_HAS_CLOCK_GETRES		1



extern struct vdso_data *__get_datapage(void);



static __always_inline int gettimeofday_fallback(
@@ -50,6 +52,24 @@ static __always_inline long clock_gettime_fallback( 
	return ret;

}



static __always_inline int clock_getres_fallback(

					clockid_t _clkid,

					struct __kernel_timespec *_ts)

{

	register struct __kernel_timespec *ts asm("r1") = _ts;

	register clockid_t clkid asm("r0") = _clkid;

	register long ret asm ("r0");

	register long nr asm("r7") = __NR_clock_getres_time64;



	asm volatile(

	"       swi #0\n"

	: "=r" (ret)

	: "r" (clkid), "r" (ts), "r" (nr)

	: "memory");



	return ret;

}



static __always_inline u64 __arch_get_hw_counter(int clock_mode)

{

#ifdef CONFIG_ARM_ARCH_TIMER

arch/arm/vdso/vdso.lds.S

+1 −0
Original line number Diff line number Diff line
@@ -71,6 +71,7 @@ VERSION 
	global:

		__vdso_clock_gettime;

		__vdso_gettimeofday;

		__vdso_clock_getres;

	local: *;

	};

}

arch/arm/vdso/vgettimeofday.c

+6 −0
Original line number Diff line number Diff line
@@ -19,6 +19,12 @@ int __vdso_gettimeofday(struct __kernel_old_timeval *tv, 
	return __cvdso_gettimeofday(tv, tz);

}



int __vdso_clock_getres(clockid_t clock_id,

			struct old_timespec32 *res)

{

	return __cvdso_clock_getres_time32(clock_id, res);

}



/* Avoid unresolved references emitted by GCC */



void __aeabi_unwind_cpp_pr0(void)

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