Add a new member topology_ready to the powerpc machdep_calls
structure.
The NUMA hot plug memory routines require the NUMA node to have
been registered via register_one_node() prior to adding memory
to the node. The powerpc arch registers NUMA nodes during
startup in its topology_init() routine.
Currently, there is no mechanism for the platform code to know
when the nodes have been registered, and hence, when it is safe
to add hot plug memory.
Signed-off-by: Geoff Levand <geoffrey.lev...@am.sony.com>
---
arch/powerpc/include/asm/machdep.h | 1 +
arch/powerpc/kernel/sysfs.c | 3 +++
2 files changed, 4 insertions(+)
--- a/arch/powerpc/include/asm/machdep.h
+++ b/arch/powerpc/include/asm/machdep.h
@@ -106,6 +106,7 @@ struct machdep_calls {
void (*setup_arch)(void); /* Optional, may be NULL */
void (*init_early)(void);
/* Optional, may be NULL. */
+ void (*topology_ready)(void); /* Optional, may be NULL */
void (*show_cpuinfo)(struct seq_file *m);
void (*show_percpuinfo)(struct seq_file *m, int i);
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -647,6 +647,9 @@ static int __init topology_init(void)
register_cpu_online(cpu);
}
+ if (ppc_md.topology_ready)
+ ppc_md.topology_ready();
+
return 0;
}
subsys_initcall(topology_init);
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