From: Anton Blanchard Date: Wed, 6 Jan 2010 04:55:13 +0000 (+1100) Subject: MIPS: cpumask_of_node() should handle -1 as a node X-Git-Tag: v2.6.33-rc4~8^2~2 X-Git-Url: http://ftp.safe.ca/?p=safe%2Fjmp%2Flinux-2.6;a=commitdiff_plain;h=d797396f3387c5be8f63fcc8e9be98bb884ea86a MIPS: cpumask_of_node() should handle -1 as a node pcibus_to_node can return -1 if we cannot determine which node a pci bus is on. If passed -1, cpumask_of_node will negatively index the lookup array and pull in random data: # cat /sys/devices/pci0000:00/0000:00:01.0/local_cpus 00000000,00000003,00000000,00000000 # cat /sys/devices/pci0000:00/0000:00:01.0/local_cpulist 64-65 Change cpumask_of_node to check for -1 and return cpu_all_mask in this case: # cat /sys/devices/pci0000:00/0000:00:01.0/local_cpus ffffffff,ffffffff,ffffffff,ffffffff # cat /sys/devices/pci0000:00/0000:00:01.0/local_cpulist 0-127 Signed-off-by: Anton Blanchard Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Cc: Rusty Russell Cc: Andrew Morton Patchwork: http://patchwork.linux-mips.org/patch/831/ Signed-off-by: Ralf Baechle --- diff --git a/arch/mips/include/asm/mach-ip27/topology.h b/arch/mips/include/asm/mach-ip27/topology.h index 09a59bc..1b1a7d1 100644 --- a/arch/mips/include/asm/mach-ip27/topology.h +++ b/arch/mips/include/asm/mach-ip27/topology.h @@ -24,7 +24,9 @@ extern struct cpuinfo_ip27 sn_cpu_info[NR_CPUS]; #define cpu_to_node(cpu) (sn_cpu_info[(cpu)].p_nodeid) #define parent_node(node) (node) -#define cpumask_of_node(node) (&hub_data(node)->h_cpus) +#define cpumask_of_node(node) ((node) == -1 ? \ + cpu_all_mask : \ + &hub_data(node)->h_cpus) struct pci_bus; extern int pcibus_to_node(struct pci_bus *);