On Wed, Jun 29, 2011 at 11:31:39AM -0700, Stephen Boyd wrote: > If an ARM system has multiple cpus in the same socket and the > kernel is booted with maxcpus=1, secondary cpus are possible but > not present due to how platform_smp_prepare_cpus() is called. > Fix this by always calling platform_smp_prepare_cpus() as long as > max_cpus is non-zero (0 means no SMP) to allow platform code to > decide if any non-boot cpus are present in the system. Since > all current platform code doesn't support physical hotplug we > have a situation where possible == present and thus we can > simply copy the possible map to the present map. > > With this patch it's possible to boot an ARM system with > maxcpus=1 on the command line and then hotplug in secondary cpus > via sysfs. This is more in line with how x86 works with maxcpus=1 > on the command line. > > Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx> Acked-by: Paul Mundt <lethal@xxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
