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(parent: 5910895) | patch
random: optimize spinlock use in add_device_randomness()
authorTheodore Ts'o <tytso@mit.edu>
Thu, 12 Sep 2013 18:27:22 +0000 (14:27 -0400)
committerTheodore Ts'o <tytso@mit.edu>
Thu, 10 Oct 2013 18:32:17 +0000 (14:32 -0400)
commit3ef4cb2d65ee13d84140cbede8e1980c6ae49ffd
tree676c6f18c9b75350b92cec558919b6d19a5e5298tree | snapshot
parent5910895f0e868d4f70303922ed00ccdc328b3c30commit | diff
random: optimize spinlock use in add_device_randomness()

The add_device_randomness() function calls mix_pool_bytes() twice for
the input pool and the non-blocking pool, for a total of four times.
By using _mix_pool_byte() and taking the spinlock in
add_device_randomness(), we can halve the number of times we need
take each pool's spinlock.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
drivers/char/random.c diff | blob | history
Andy's Linux Kernel repo