sched/deadline: Test for CPU's presence explicitly
authorBoris Ostrovsky <boris.ostrovsky@oracle.com>
Mon, 17 Feb 2014 14:12:33 +0000 (09:12 -0500)
committerThomas Gleixner <tglx@linutronix.de>
Fri, 21 Feb 2014 20:27:10 +0000 (21:27 +0100)
commit82b95800b256205cff2eeab5bbd03430d2d0f20d
tree55bf8912c9005324c964510b5cb53a57a8e311ff
parent6d35ab48090b10c5ea5604ed5d6e91f302dc6060
sched/deadline: Test for CPU's presence explicitly

A hot-removed CPU may have ID that is numerically larger than the number of
existing CPUs in the system (e.g. we can unplug CPU 4 from a system that
has CPUs 0, 1 and 4).

Thus the WARN_ONs should check whether the CPU in question is currently
present, not whether its ID value is less than num_present_cpus().

Cc: Ingo Molnar <mingo@kernel.org>
Cc: Juri Lelli <juri.lelli@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1392646353-1874-1-git-send-email-boris.ostrovsky@oracle.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
kernel/sched/cpudeadline.c