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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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aa6b54461c
Create a simple macro to always return a pointer to the node_to_cpumask(node)
value. This relies on compiler optimization to remove the extra indirection:
#define node_to_cpumask_ptr(v, node) \
cpumask_t _##v = node_to_cpumask(node), *v = &_##v
For those systems with a large cpumask size, then a true pointer
to the array element can be used:
#define node_to_cpumask_ptr(v, node) \
cpumask_t *v = &(node_to_cpumask_map[node])
A node_to_cpumask_ptr_next() macro is provided to access another
node_to_cpumask value.
The other change is to always include asm-generic/topology.h moving the
ifdef CONFIG_NUMA to this same file.
Note: there are no references to either of these new macros in this patch,
only the definition.
Based on 2.6.25-rc5-mm1
# alpha
Cc: Richard Henderson <rth@twiddle.net>
# fujitsu
Cc: David Howells <dhowells@redhat.com>
# ia64
Cc: Tony Luck <tony.luck@intel.com>
# powerpc
Cc: Paul Mackerras <paulus@samba.org>
Cc: Anton Blanchard <anton@samba.org>
# sparc
Cc: David S. Miller <davem@davemloft.net>
Cc: William L. Irwin <wli@holomorphy.com>
# x86
Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
48 lines
811 B
C
48 lines
811 B
C
#ifndef _ASM_ALPHA_TOPOLOGY_H
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#define _ASM_ALPHA_TOPOLOGY_H
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#include <linux/smp.h>
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#include <linux/threads.h>
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#include <asm/machvec.h>
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#ifdef CONFIG_NUMA
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static inline int cpu_to_node(int cpu)
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{
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int node;
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if (!alpha_mv.cpuid_to_nid)
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return 0;
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node = alpha_mv.cpuid_to_nid(cpu);
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#ifdef DEBUG_NUMA
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BUG_ON(node < 0);
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#endif
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return node;
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}
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static inline cpumask_t node_to_cpumask(int node)
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{
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cpumask_t node_cpu_mask = CPU_MASK_NONE;
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int cpu;
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for_each_online_cpu(cpu) {
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if (cpu_to_node(cpu) == node)
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cpu_set(cpu, node_cpu_mask);
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}
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#ifdef DEBUG_NUMA
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printk("node %d: cpu_mask: %016lx\n", node, node_cpu_mask);
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#endif
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return node_cpu_mask;
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}
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#define pcibus_to_cpumask(bus) (cpu_online_map)
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#endif /* !CONFIG_NUMA */
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# include <asm-generic/topology.h>
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#endif /* _ASM_ALPHA_TOPOLOGY_H */
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