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x86-64, NUMA: Add proper function comments to global functions

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Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
This commit is contained in:
Tejun Heo
2011-02-22 11:10:08 +01:00
parent b8ef9172b2
commit 90e6b677b4
2 changed files with 69 additions and 10 deletions
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29
arch/x86/mm/numa_emulation.c
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@@ -267,9 +267,32 @@ static int __init split_nodes_size_interleave(struct numa_meminfo *ei,
return 0;
}
/*
* Sets up the system RAM area from start_pfn to last_pfn according to the
* numa=fake command-line option.
/**
* numa_emulation - Emulate NUMA nodes
* @numa_meminfo: NUMA configuration to massage
* @numa_dist_cnt: The size of the physical NUMA distance table
*
* Emulate NUMA nodes according to the numa=fake kernel parameter.
* @numa_meminfo contains the physical memory configuration and is modified
* to reflect the emulated configuration on success. @numa_dist_cnt is
* used to determine the size of the physical distance table.
*
* On success, the following modifications are made.
*
* - @numa_meminfo is updated to reflect the emulated nodes.
*
* - __apicid_to_node[] is updated such that APIC IDs are mapped to the
* emulated nodes.
*
* - NUMA distance table is rebuilt to represent distances between emulated
* nodes. The distances are determined considering how emulated nodes
* are mapped to physical nodes and match the actual distances.
*
* - emu_nid_to_phys[] reflects how emulated nodes are mapped to physical
* nodes. This is used by numa_add_cpu() and numa_remove_cpu().
*
* If emulation is not enabled or fails, emu_nid_to_phys[] is filled with
* identity mapping and no other modification is made.
*/
void __init numa_emulation(struct numa_meminfo *numa_meminfo, int numa_dist_cnt)
{