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
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@ -975,7 +975,7 @@ static void init_std_data(struct entropy_store *r)
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now = ktime_get_real();
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now = ktime_get_real();
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mix_pool_bytes(r, &now, sizeof(now));
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mix_pool_bytes(r, &now, sizeof(now));
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for (i = r->poolinfo->poolwords; i; i--) {
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for (i = r->poolinfo->POOLBYTES; i > 0; i -= sizeof flags) {
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if (!arch_get_random_long(&flags))
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if (!arch_get_random_long(&flags))
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break;
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break;
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mix_pool_bytes(r, &flags, sizeof(flags));
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mix_pool_bytes(r, &flags, sizeof(flags));
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