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powerpc/pseries: Correct pseries/dlpar.c build break without CONFIG_SMP

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The recent patch to add cpu offline/online as part of the DLPAR
process for pseries causes a build break if CONFIG_SMP is not
defined.  Original patch here;
http://lists.ozlabs.org/pipermail/linuxppc-dev/2009-November/078299.html

This corrects the build break by moving the online_node_cpus
and offline_node_cpus under the #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
portions of dlpar.c.

This patch also slightly modifies the online_node_cpus and offline_node_cpus
routines to prepend dlpar_ to the them and make them static.  These two
routine are only used in the dlpar add/remove of cpus and these changes
should help clarify that.

Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Nathan Fontenot 2009-12-08 09:48:44 +00:00 committed by Benjamin Herrenschmidt
parent 40d50cf7ca
commit 275a64f604
1 changed files with 94 additions and 94 deletions
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188
arch/powerpc/platforms/pseries/dlpar.c
View file

@ -288,98 +288,6 @@ int dlpar_detach_node(struct device_node *dn)
return 0;
}
int online_node_cpus(struct device_node *dn)
{
int rc = 0;
unsigned int cpu;
int len, nthreads, i;
const u32 *intserv;
intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", &len);
if (!intserv)
return -EINVAL;
nthreads = len / sizeof(u32);
cpu_maps_update_begin();
for (i = 0; i < nthreads; i++) {
for_each_present_cpu(cpu) {
if (get_hard_smp_processor_id(cpu) != intserv[i])
continue;
BUG_ON(get_cpu_current_state(cpu)
!= CPU_STATE_OFFLINE);
cpu_maps_update_done();
rc = cpu_up(cpu);
if (rc)
goto out;
cpu_maps_update_begin();
break;
}
if (cpu == num_possible_cpus())
printk(KERN_WARNING "Could not find cpu to online "
"with physical id 0x%x\n", intserv[i]);
}
cpu_maps_update_done();
out:
return rc;
}
int offline_node_cpus(struct device_node *dn)
{
int rc = 0;
unsigned int cpu;
int len, nthreads, i;
const u32 *intserv;
intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", &len);
if (!intserv)
return -EINVAL;
nthreads = len / sizeof(u32);
cpu_maps_update_begin();
for (i = 0; i < nthreads; i++) {
for_each_present_cpu(cpu) {
if (get_hard_smp_processor_id(cpu) != intserv[i])
continue;
if (get_cpu_current_state(cpu) == CPU_STATE_OFFLINE)
break;
if (get_cpu_current_state(cpu) == CPU_STATE_ONLINE) {
cpu_maps_update_done();
rc = cpu_down(cpu);
if (rc)
goto out;
cpu_maps_update_begin();
break;
}
/*
* The cpu is in CPU_STATE_INACTIVE.
* Upgrade it's state to CPU_STATE_OFFLINE.
*/
set_preferred_offline_state(cpu, CPU_STATE_OFFLINE);
BUG_ON(plpar_hcall_norets(H_PROD, intserv[i])
!= H_SUCCESS);
__cpu_die(cpu);
break;
}
if (cpu == num_possible_cpus())
printk(KERN_WARNING "Could not find cpu to offline "
"with physical id 0x%x\n", intserv[i]);
}
cpu_maps_update_done();
out:
return rc;
}
#define DR_ENTITY_SENSE 9003
#define DR_ENTITY_PRESENT 1
#define DR_ENTITY_UNUSABLE 2
@ -448,6 +356,45 @@ void cpu_hotplug_driver_unlock()
mutex_unlock(&pseries_cpu_hotplug_mutex);
}
static int dlpar_online_cpu(struct device_node *dn)
{
int rc = 0;
unsigned int cpu;
int len, nthreads, i;
const u32 *intserv;
intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", &len);
if (!intserv)
return -EINVAL;
nthreads = len / sizeof(u32);
cpu_maps_update_begin();
for (i = 0; i < nthreads; i++) {
for_each_present_cpu(cpu) {
if (get_hard_smp_processor_id(cpu) != intserv[i])
continue;
BUG_ON(get_cpu_current_state(cpu)
!= CPU_STATE_OFFLINE);
cpu_maps_update_done();
rc = cpu_up(cpu);
if (rc)
goto out;
cpu_maps_update_begin();
break;
}
if (cpu == num_possible_cpus())
printk(KERN_WARNING "Could not find cpu to online "
"with physical id 0x%x\n", intserv[i]);
}
cpu_maps_update_done();
out:
return rc;
}
static ssize_t dlpar_cpu_probe(const char *buf, size_t count)
{
struct device_node *dn;
@ -497,13 +444,66 @@ static ssize_t dlpar_cpu_probe(const char *buf, size_t count)
dlpar_free_cc_nodes(dn);
}
rc = online_node_cpus(dn);
rc = dlpar_online_cpu(dn);
out:
cpu_hotplug_driver_unlock();
return rc ? rc : count;
}
static int dlpar_offline_cpu(struct device_node *dn)
{
int rc = 0;
unsigned int cpu;
int len, nthreads, i;
const u32 *intserv;
intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", &len);
if (!intserv)
return -EINVAL;
nthreads = len / sizeof(u32);
cpu_maps_update_begin();
for (i = 0; i < nthreads; i++) {
for_each_present_cpu(cpu) {
if (get_hard_smp_processor_id(cpu) != intserv[i])
continue;
if (get_cpu_current_state(cpu) == CPU_STATE_OFFLINE)
break;
if (get_cpu_current_state(cpu) == CPU_STATE_ONLINE) {
cpu_maps_update_done();
rc = cpu_down(cpu);
if (rc)
goto out;
cpu_maps_update_begin();
break;
}
/*
* The cpu is in CPU_STATE_INACTIVE.
* Upgrade it's state to CPU_STATE_OFFLINE.
*/
set_preferred_offline_state(cpu, CPU_STATE_OFFLINE);
BUG_ON(plpar_hcall_norets(H_PROD, intserv[i])
!= H_SUCCESS);
__cpu_die(cpu);
break;
}
if (cpu == num_possible_cpus())
printk(KERN_WARNING "Could not find cpu to offline "
"with physical id 0x%x\n", intserv[i]);
}
cpu_maps_update_done();
out:
return rc;
}
static ssize_t dlpar_cpu_release(const char *buf, size_t count)
{
struct device_node *dn;
@ -521,7 +521,7 @@ static ssize_t dlpar_cpu_release(const char *buf, size_t count)
}
cpu_hotplug_driver_lock();
rc = offline_node_cpus(dn);
rc = dlpar_offline_cpu(dn);
if (rc) {
of_node_put(dn);
rc = -EINVAL;