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author | Marc Zyngier | 2012-02-14 12:25:58 +0100 |
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committer | Marc Zyngier | 2012-04-27 14:35:32 +0200 |
commit | bfa05f4f3398b61205567f3a5cad90804a5a1fdc (patch) | |
tree | aa1f0e73fea7f29db1e24d1a12ee2fa9124bf922 /arch/arm | |
parent | Linux 3.4-rc4 (diff) | |
download | kernel-qcow2-linux-bfa05f4f3398b61205567f3a5cad90804a5a1fdc.tar.gz kernel-qcow2-linux-bfa05f4f3398b61205567f3a5cad90804a5a1fdc.tar.xz kernel-qcow2-linux-bfa05f4f3398b61205567f3a5cad90804a5a1fdc.zip |
ARM: local timers: reserve local_timer_register() to SMP
When running an SMP_ON_UP enabled kernel on UP, or with nosmp
passed to the kernel, we want to be able to detect that a local
timer is not going to be used (local timers are only used on
SMP platforms), so we could register it as a global timer instead.
Return -ENXIO when the above case is detected.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm')
-rw-r--r-- | arch/arm/kernel/smp.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index addbbe8028c2..11c4148b8abb 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -454,6 +454,9 @@ static struct local_timer_ops *lt_ops; #ifdef CONFIG_LOCAL_TIMERS int local_timer_register(struct local_timer_ops *ops) { + if (!is_smp() || !setup_max_cpus) + return -ENXIO; + if (lt_ops) return -EBUSY; |