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Commit 017cecee authored by Geert Uytterhoeven's avatar Geert Uytterhoeven
Browse files

m68k: Add infrastructure for machine-specific random_get_entropy() 



On m68k, get_cycles() (the default implementation for random_get_entropy())
always returns zero, providing no entropy for the random driver.

Add a hook where platforms can provide their own implementation, and wire
it up in the infrastructure provided by commit
61875f30 ("random: allow architectures to
optionally define random_get_entropy()").

Signed-off-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
parent 7a15dd5c

arch/m68k/include/asm/timex.h

+10 −0
Original line number Diff line number Diff line
@@ -28,4 +28,14 @@ static inline cycles_t get_cycles(void) 
	return 0;

}



extern unsigned long (*mach_random_get_entropy)(void);



static inline unsigned long random_get_entropy(void)

{

	if (mach_random_get_entropy)

		return mach_random_get_entropy();

	return 0;

}

#define random_get_entropy	random_get_entropy



#endif

arch/m68k/kernel/time.c

+4 −0
Original line number Diff line number Diff line
@@ -28,6 +28,10 @@ 
#include <linux/timex.h>

#include <linux/profile.h>





unsigned long (*mach_random_get_entropy)(void);





/*

 * timer_interrupt() needs to keep up the real-time clock,

 * as well as call the "xtime_update()" routine every clocktick