From: "Jason A. Donenfeld" Jason@zx2c4.com
commit 9b29b6b20376ab64e1b043df6301d8a92378e631 upstream.
The current flow expands to:
if (crng_ready()) ... else if (...) if (!crng_ready()) ...
The second crng_ready() call is redundant, but can't so easily be optimized out by the compiler.
This commit simplifies that to:
if (crng_ready() ... else if (...) ...
Fixes: 560181c27b58 ("random: move initialization functions out of hot pages") Cc: stable@vger.kernel.org Cc: Dominik Brodowski linux@dominikbrodowski.net Signed-off-by: Jason A. Donenfeld Jason@zx2c4.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/char/random.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -835,7 +835,7 @@ int __init random_init(const char *comma if (crng_ready()) crng_reseed(); else if (trust_cpu) - credit_init_bits(arch_bytes * 8); + _credit_init_bits(arch_bytes * 8);
return 0; }