From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <49935F81.7060203@am.sony.com> Date: Wed, 11 Feb 2009 15:30:09 -0800 From: Geoff Levand MIME-Version: 1.0 To: Benjamin Herrenschmidt Subject: [RFC patch] powerpc: Add topology_ready to machdep calls Content-Type: text/plain; charset="ISO-8859-1" Cc: Linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 --- 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);