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
61875f30daf60305712e25b209ef41ced2635bad ("random: allow architectures to
optionally define random_get_entropy()").
Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
---
v2:
- Hook for random_get_entropy() instead of get_cycles()
arch/m68k/include/asm/timex.h | 10 ++++++++++
arch/m68k/kernel/time.c | 4 ++++
2 files changed, 14 insertions(+)
diff --git a/arch/m68k/include/asm/timex.h b/arch/m68k/include/asm/timex.h
index 6759dad954f6..efc1f4892357 100644
--- a/arch/m68k/include/asm/timex.h
+++ b/arch/m68k/include/asm/timex.h
@@ -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
diff --git a/arch/m68k/kernel/time.c b/arch/m68k/kernel/time.c
index 7eb9792009f8..958f1adb9d0c 100644
--- a/arch/m68k/kernel/time.c
+++ b/arch/m68k/kernel/time.c
@@ -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
--
1.7.9.5
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