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random: Add arch_has_random[_seed]()

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Add predicate functions for having arch_get_random[_seed]*().  The
only current use is to avoid the loop in arch_random_refill() when
arch_get_random_seed_long() is unavailable.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
H. Peter Anvin 2014-03-17 16:36:30 -07:00 • committed by Theodore Ts'o
parent 331c6490c7
commit 7b878d4b48
4 changed files with 23 additions and 0 deletions
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8
include/linux/random.h
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@ -88,6 +88,10 @@ static inline int arch_get_random_int(unsigned int *v)
{
return 0;
}
static inline int arch_has_random(void)
{
return 0;
}
static inline int arch_get_random_seed_long(unsigned long *v)
{
return 0;
@ -96,6 +100,10 @@ static inline int arch_get_random_seed_int(unsigned int *v)
{
return 0;
}
static inline int arch_has_random_seed(void)
{
return 0;
}
#endif
/* Pseudo random number generator from numerical recipes. */