tty: audit: Simplify first-use allocation

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The first-use tty audit buffer allocation is a potential race
amongst multiple attempts at 'first-use'; only one 'winner' is
acceptable.

The successful buffer assignment occurs if tty_audit_buf == NULL
(which will also be the return from cmpxchg()); otherwise, another
racer 'won' and this buffer allocation is freed.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Peter Hurley 2016-01-09 22:55:36 -08:00 • committed by Greg Kroah-Hartman

parent 5493090fc2

commit fbaa122718

1 changed files with 7 additions and 15 deletions

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drivers/tty/tty_audit.c

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