tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#!/bin/bash
2#
3# Extract the number of CPUs expected from the specified Kconfig-file
4# fragment by checking CONFIG_SMP and CONFIG_NR_CPUS. If the specified
5# file gives no clue, base the number on the number of idle CPUs on
6# the system.
7#
8# Usage: configNR_CPUS.sh config-frag
9#
10# This program is free software; you can redistribute it and/or modify
11# it under the terms of the GNU General Public License as published by
12# the Free Software Foundation; either version 2 of the License, or
13# (at your option) any later version.
14#
15# This program is distributed in the hope that it will be useful,
16# but WITHOUT ANY WARRANTY; without even the implied warranty of
17# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18# GNU General Public License for more details.
19#
20# You should have received a copy of the GNU General Public License
21# along with this program; if not, you can access it online at
22# http://www.gnu.org/licenses/gpl-2.0.html.
23#
24# Copyright (C) IBM Corporation, 2013
25#
26# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
27
28cf=$1
29if test ! -r $cf
30then
31 echo Unreadable config fragment $cf 1>&2
32 exit -1
33fi
34if grep -q '^CONFIG_SMP=n$' $cf
35then
36 echo 1
37 exit 0
38fi
39if grep -q '^CONFIG_NR_CPUS=' $cf
40then
41 grep '^CONFIG_NR_CPUS=' $cf |
42 sed -e 's/^CONFIG_NR_CPUS=\([0-9]*\).*$/\1/'
43 exit 0
44fi
45cpus2use.sh