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authorBaoquan He <bhe@redhat.com>2019-05-14 03:19:32 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-05-14 19:47:48 +0300
commit7567cfc5da9faadbe56dbd65c802b6b828a57d8b (patch)
treea13064dc730eb8998f854051b578f1d26956a6b5 /mm/sparse.c
parent926e5d1cb525ec4faa66ddb24ac3b61c0102cb5c (diff)
downloadlinux-7567cfc5da9faadbe56dbd65c802b6b828a57d8b.tar.xz
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The code comment above sparse_add_one_section() is obsolete and incorrect.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>
Diffstat (limited to 'mm/sparse.c')
-rw-r--r--mm/sparse.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/mm/sparse.c b/mm/sparse.c
index 56e057c432f9..fd13166949b5 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -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)