tree c1899216c778c22ea56ac4dade06d46b94548acc
parent 32a1f12961b485a02ba84ecddf39c17deeb345d7
author Theodore Ts'o <tytso@mit.edu> 1496876492 -0400
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1523641712 +0200

random: use lockless method of accessing and updating f->reg_idx

commit 92e75428ffc90e2a0321062379f883f3671cfebe upstream.

Linus pointed out that there is a much more efficient way of avoiding
the problem that we were trying to address in commit 9dfa7bba35ac0:
"fix race in drivers/char/random.c:get_reg()".

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: Michael Schmitz <schmitzmic@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>