linux-kernel - [PATCH 6/14] cpumask: use cpu_online in kernel/perf

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Date:	Tue, 3 Nov 2009 14:56:59 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH 6/14] cpumask: use cpu_online in kernel/perf_event.c


Also, we want to check against nr_cpu_ids, not num_possible_cpus().
The latter works, but the correct bounds check is < nr_cpu_ids.

Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>
To: Thomas Gleixner <tglx@...utronix.de>
---
 kernel/perf_event.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/perf_event.c b/kernel/perf_event.c
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -1596,7 +1596,7 @@ static struct perf_event_context *find_g
 		if (perf_paranoid_cpu() && !capable(CAP_SYS_ADMIN))
 			return ERR_PTR(-EACCES);
 
-		if (cpu < 0 || cpu > num_possible_cpus())
+		if (cpu < 0 || cpu >= nr_cpu_ids)
 			return ERR_PTR(-EINVAL);
 
 		/*
@@ -1604,7 +1604,7 @@ static struct perf_event_context *find_g
 		 * offline CPU and activate it when the CPU comes up, but
 		 * that's for later.
 		 */
-		if (!cpu_isset(cpu, cpu_online_map))
+		if (!cpu_online(cpu))
 			return ERR_PTR(-ENODEV);
 
 		cpuctx = &per_cpu(perf_cpu_context, cpu);

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