mm/sparse.c: clean up obsolete code comment
The code comment above sparse_add_one_section() is obsolete and incorrect. Clean it up and write a new one. Link: http://lkml.kernel.org/r/20190329144250.14315-1-bhe@redhat.com Signed-off-by: Baoquan He <bhe@redhat.com> Acked-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Oscar Salvador <osalvador@suse.de> Reviewed-by: Mukesh Ojha <mojha@codeaurora.org> Reviewed-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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mm/sparse.c
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mm/sparse.c
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@ -684,10 +684,18 @@ static void free_map_bootmem(struct page *memmap)
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#endif /* CONFIG_MEMORY_HOTREMOVE */
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#endif /* CONFIG_SPARSEMEM_VMEMMAP */
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/*
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* returns the number of sections whose mem_maps were properly
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* set. If this is <=0, then that means that the passed-in
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* map was not consumed and must be freed.
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/**
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* sparse_add_one_section - add a memory section
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* @nid: The node to add section on
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* @start_pfn: start pfn of the memory range
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* @altmap: device page map
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*
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* This is only intended for hotplug.
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*
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* Return:
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* * 0 - On success.
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* * -EEXIST - Section has been present.
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* * -ENOMEM - Out of memory.
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*/
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int __meminit sparse_add_one_section(int nid, unsigned long start_pfn,
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struct vmem_altmap *altmap)
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