m68k: Add infrastructure for machine-specific random_get_entropy() (017cecee) · Commits · 戴 / test

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 ("random: allow architectures to optionally define random_get_entropy()"). Signed-off-by:

Geert Uytterhoeven <geert@linux-m68k.org>

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

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