diff options
| author | H. Peter Anvin | 2014-03-18 00:36:30 +0100 |
|---|---|---|
| committer | Theodore Ts'o | 2014-03-20 03:24:08 +0100 |
| commit | 7b878d4b48c4e04b936918bb83836a107ba453b3 (patch) | |
| tree | 83df1d702e0162dc7785730356d934b8d59c45e2 /drivers/char | |
| parent | random: If we have arch_get_random_seed*(), try it before blocking (diff) | |
| download | kernel-qcow2-linux-7b878d4b48c4e04b936918bb83836a107ba453b3.tar.gz kernel-qcow2-linux-7b878d4b48c4e04b936918bb83836a107ba453b3.tar.xz kernel-qcow2-linux-7b878d4b48c4e04b936918bb83836a107ba453b3.zip | |
random: Add arch_has_random[_seed]()
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>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/random.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c index c35cee268e13..6b75713d953a 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -1307,6 +1307,9 @@ static int arch_random_refill(void) unsigned int i; unsigned long buf[nlongs]; + if (!arch_has_random_seed()) + return 0; + for (i = 0; i < nlongs; i++) { if (arch_get_random_seed_long(&buf[n])) n++; |