From: "Jason A. Donenfeld" Jason@zx2c4.com
commit e10e2f58030c5c211d49042a8c2a1b93d40b2ffb upstream.
In the event that random_get_entropy() can't access a cycle counter or similar, falling back to returning 0 is really not the best we can do. Instead, at least calling random_get_entropy_fallback() would be preferable, because that always needs to return _something_, even falling back to jiffies eventually. It's not as though random_get_entropy_fallback() is super high precision or guaranteed to be entropic, but basically anything that's not zero all the time is better than returning zero all the time.
This is accomplished by just including the asm-generic code like on other architectures, which means we can get rid of the empty stub function here.
Cc: Thomas Gleixner tglx@linutronix.de Cc: Arnd Bergmann arnd@arndb.de Acked-by: Max Filippov jcmvbkbc@gmail.com Signed-off-by: Jason A. Donenfeld Jason@zx2c4.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/xtensa/include/asm/timex.h | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
--- a/arch/xtensa/include/asm/timex.h +++ b/arch/xtensa/include/asm/timex.h @@ -30,10 +30,6 @@
extern unsigned long ccount_freq;
-typedef unsigned long long cycles_t; - -#define get_cycles() (0) - void local_timer_setup(unsigned cpu);
/* @@ -69,4 +65,6 @@ static inline void set_linux_timer (unsi WSR_CCOMPARE(LINUX_TIMER, ccompare); }
+#include <asm-generic/timex.h> + #endif /* _XTENSA_TIMEX_H */