irq/Documentation: Correct result of echnoing 5 to smp_affinity

This command:

  echo 5 > /proc/irq/10/smp_affinity

means only the first and third (not fourth) CPUs can handle irqs
That is, CPU0 is the first CPU and CPU2 is the third cpu

Signed-off-by: John Kacur <jkacur@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1466168715-8410-1-git-send-email-jkacur@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index e8d00759bfa50fc34dd088e3be9af77ff1ad55c0..5b61eeae3f6e38cfb27c83927fbbb836316cc668 100644 (file)
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -725,7 +725,7 @@ IRQ, you can set it by doing:
   > echo 1 > /proc/irq/10/smp_affinity
 
 This means that only the first CPU will handle the IRQ, but you can also echo
-5 which means that only the first and fourth CPU can handle the IRQ.
+5 which means that only the first and third CPU can handle the IRQ.
 
 The contents of each smp_affinity file is the same by default: