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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The code comment above sparse_add_one_section() is obsolete and incorrect.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>
This commit is contained in:
Baoquan He 2019-05-13 17:19:32 -07:00 committed by Linus Torvalds
parent 926e5d1cb5
commit 7567cfc5da
1 changed files with 12 additions and 4 deletions
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16
mm/sparse.c
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@ -684,10 +684,18 @@ static void free_map_bootmem(struct page *memmap)
#endif /* CONFIG_MEMORY_HOTREMOVE */
#endif /* CONFIG_SPARSEMEM_VMEMMAP */
/*
* returns the number of sections whose mem_maps were properly
* set. If this is <=0, then that means that the passed-in
* map was not consumed and must be freed.
/**
* sparse_add_one_section - add a memory section
* @nid: The node to add section on
* @start_pfn: start pfn of the memory range
* @altmap: device page map
*
* This is only intended for hotplug.
*
* Return:
* * 0 - On success.
* * -EEXIST - Section has been present.
* * -ENOMEM - Out of memory.
*/
int __meminit sparse_add_one_section(int nid, unsigned long start_pfn,
struct vmem_altmap *altmap)