diff options
| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2008-04-30 13:38:37 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-04-30 13:38:44 +0200 |
| commit | 1e489518da2a49604df2c3281034097274324be9 (patch) | |
| tree | f0a6e5b9a19d2d3f8aef4ba1ad3a762e01d4e67a /arch | |
| parent | [S390] smp: Fix locking order. (diff) | |
| download | linux-1e489518da2a49604df2c3281034097274324be9.tar.xz linux-1e489518da2a49604df2c3281034097274324be9.zip | |
[S390] Automatically detect added cpus.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/kernel/smp.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index 6bb5c050640f..0aeb290060d9 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -505,7 +505,7 @@ out: return rc; } -static int smp_rescan_cpus(void) +static int __smp_rescan_cpus(void) { cpumask_t avail; @@ -570,7 +570,7 @@ out: kfree(info); printk(KERN_INFO "CPUs: %d configured, %d standby\n", c_cpus, s_cpus); get_online_cpus(); - smp_rescan_cpus(); + __smp_rescan_cpus(); put_online_cpus(); } @@ -1088,8 +1088,8 @@ out: } #ifdef CONFIG_HOTPLUG_CPU -static ssize_t __ref rescan_store(struct sys_device *dev, - const char *buf, size_t count) + +int smp_rescan_cpus(void) { cpumask_t newcpus; int cpu; @@ -1098,7 +1098,7 @@ static ssize_t __ref rescan_store(struct sys_device *dev, get_online_cpus(); mutex_lock(&smp_cpu_state_mutex); newcpus = cpu_present_map; - rc = smp_rescan_cpus(); + rc = __smp_rescan_cpus(); if (rc) goto out; cpus_andnot(newcpus, cpu_present_map, newcpus); @@ -1113,6 +1113,15 @@ out: put_online_cpus(); if (!cpus_empty(newcpus)) topology_schedule_update(); + return rc; +} + +static ssize_t __ref rescan_store(struct sys_device *dev, const char *buf, + size_t count) +{ + int rc; + + rc = smp_rescan_cpus(); return rc ? rc : count; } static SYSDEV_ATTR(rescan, 0200, NULL, rescan_store); |