[PATCH] mm: Fix some broken comments

[Miaohe Lin <linmiaohe@huawei.com>]

Fix some broken comments including typo, grammar error and wrong function
name.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
---
 mm/filemap.c    | 4 ++--
 mm/swap_state.c | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index 585278d13d96..ac04738bf11b 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1347,7 +1347,7 @@ static inline bool clear_bit_unlock_is_negative_byte(long nr, volatile void *mem
  * unlock_page - unlock a locked page
  * @page: the page
  *
- * Unlocks the page and wakes up sleepers in ___wait_on_page_locked().
+ * Unlocks the page and wakes up sleepers in wait_on_page_locked().
  * Also wakes sleepers in wait_on_page_writeback() because the wakeup
  * mechanism between PageLocked pages and PageWriteback pages is shared.
  * But that's OK - sleepers in wait_on_page_writeback() just go back to sleep.
@@ -2902,7 +2902,7 @@ static struct page *do_read_cache_page(struct address_space *mapping,
 		goto out;
 
 	/*
-	 * Page is not up to date and may be locked due one of the following
+	 * Page is not up to date and may be locked due to one of the following
 	 * case a: Page is being filled and the page lock is held
 	 * case b: Read/write error clearing the page uptodate status
 	 * case c: Truncation in progress (page locked)
diff --git a/mm/swap_state.c b/mm/swap_state.c
index 7f9449bbffdb..6f4212d34aac 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -245,7 +245,7 @@ int add_to_swap(struct page *page)
 		goto fail;
 	/*
 	 * Normally the page will be dirtied in unmap because its pte should be
-	 * dirty. A special case is MADV_FREE page. The page'e pte could have
+	 * dirty. A special case is MADV_FREE page. The page's pte could have
 	 * dirty bit cleared but the page's SwapBacked bit is still set because
 	 * clearing the dirty bit and SwapBacked bit has no lock protected. For
 	 * such page, unmap will not set dirty bit for it, so page reclaim will
-- 
2.19.1