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Commit 7e48c0b9 authored by Rob Herring's avatar Rob Herring
Browse files

ARM: make sched_clock just call a function pointer 



This converts sched_clock to simply a call to a function pointer in order
to allow overriding it. This will allow for use with 64-bit counters where
overflow handling is not needed.

Signed-off-by: default avatarRob Herring <rob.herring@calxeda.com>
parent c115739d

arch/arm/include/asm/sched_clock.h

+2 −0
Original line number Diff line number Diff line
@@ -11,4 +11,6 @@ 
extern void sched_clock_postinit(void);

extern void setup_sched_clock(u32 (*read)(void), int bits, unsigned long rate);



extern unsigned long long (*sched_clock_func)(void);



#endif

arch/arm/kernel/sched_clock.c

+8 −1
Original line number Diff line number Diff line
@@ -165,12 +165,19 @@ void __init setup_sched_clock(u32 (*read)(void), int bits, unsigned long rate) 
	pr_debug("Registered %pF as sched_clock source\n", read);

}



unsigned long long notrace sched_clock(void)

static unsigned long long notrace sched_clock_32(void)

{

	u32 cyc = read_sched_clock();

	return cyc_to_sched_clock(cyc, sched_clock_mask);

}



unsigned long long __read_mostly (*sched_clock_func)(void) = sched_clock_32;



unsigned long long notrace sched_clock(void)

{

	return sched_clock_func();

}



void __init sched_clock_postinit(void)

{

	/*