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mm/swap: fix the comment of get_kernel_pages

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If no pages were pinned, 0 is returned in fact.  Fix the corresponding
comment.

[akpm@linux-foundation.org: s/nr_pages/nr_segs/ also, per David, reflow comment]
Link: https://lkml.kernel.org/r/20220509131416.17553-15-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Naoya Horiguchi <naoya.horiguchi@nec.com>
Cc: NeilBrown <neilb@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Oscar Salvador <osalvador@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Miaohe Lin 2022-05-19 14:08:52 -07:00 committed by akpm
parent 3c3115ad6b
commit 133d2743ef
1 changed files with 4 additions and 4 deletions
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mm/swap.c
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@ -166,10 +166,10 @@ EXPORT_SYMBOL(put_pages_list);
* @pages: array that receives pointers to the pages pinned. * @pages: array that receives pointers to the pages pinned.
* Should be at least nr_segs long. * Should be at least nr_segs long.
* *
* Returns number of pages pinned. This may be fewer than the number * Returns number of pages pinned. This may be fewer than the number requested.
* requested. If nr_pages is 0 or negative, returns 0. If no pages * If nr_segs is 0 or negative, returns 0. If no pages were pinned, returns 0.
* were pinned, returns -errno. Each page returned must be released * Each page returned must be released with a put_page() call when it is
* with a put_page() call when it is finished with. * finished with.
*/ */
int get_kernel_pages(const struct kvec *kiov, int nr_segs, int write, int get_kernel_pages(const struct kvec *kiov, int nr_segs, int write,
struct page **pages) struct page **pages)