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Commit 2dac8e54f988ab58525505d7ef982493374433c3

Authored by H. Peter Anvin
1 parent 3e88bdff1c
Exists in master and in 6 other branches imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

random: Adjust the number of loops when initializing 

When we are initializing using arch_get_random_long() we only need to
loop enough times to touch all the bytes in the buffer; using
poolwords for that does twice the number of operations necessary on a
64-bit machine, since in the random number generator code "word" means
32 bits.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Link: http://lkml.kernel.org/r/1324589281-31931-1-git-send-email-tytso@mit.edu

Showing 1 changed file with 1 additions and 1 deletions Side-by-side Diff

drivers/char/random.c
Diff comments   View file @ 2dac8e5
... ... @@ -975,7 +975,7 @@
975 975  
976 976 now = ktime_get_real();
977 977 mix_pool_bytes(r, &now, sizeof(now));
978   - for (i = r->poolinfo->poolwords; i; i--) {
  978 + for (i = r->poolinfo->POOLBYTES; i > 0; i -= sizeof flags) {
979 979 if (!arch_get_random_long(&flags))
980 980 break;
981 981 mix_pool_bytes(r, &flags, sizeof(flags));