Re: [PATCH 2/2] mm: Move free_unref_page to mm/internal.h

[Vlastimil Babka]

On 11/25/20 4:46 AM, Matthew Wilcox (Oracle) wrote:
Code outside mm/ should not be calling free_unref_page().  Also
move free_unref_page_list().

Good idea.

Signed-off-by: Matthew Wilcox (Oracle) <wi...@infradead.org>

Acked-by: Vlastimil Babka <vba...@suse.cz>

There seems to be some effort to remove "extern" from function 
declarations from headers. Do we want to do that, at once, or piecemeal? 
If the latter, this is a chance for these functions at least :)

---
  include/linux/gfp.h | 2 --
  mm/internal.h       | 3 +++
  2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index c603237e006c..6e479e9c48ce 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -580,8 +580,6 @@ void * __meminit alloc_pages_exact_nid(int nid, size_t 
size, gfp_t gfp_mask);
  
  extern void __free_pages(struct page *page, unsigned int order);
  extern void free_pages(unsigned long addr, unsigned int order);
-extern void free_unref_page(struct page *page);
-extern void free_unref_page_list(struct list_head *list);
  
  struct page_frag_cache;
  extern void __page_frag_cache_drain(struct page *page, unsigned int count);
diff --git a/mm/internal.h b/mm/internal.h
index 75ae680d0a2c..5864815947fe 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -201,6 +201,9 @@ extern void post_alloc_hook(struct page *page, unsigned int 
order,
                                        gfp_t gfp_flags);
  extern int user_min_free_kbytes;
  
+extern void free_unref_page(struct page *page);
+extern void free_unref_page_list(struct list_head *list);
+
  extern void zone_pcp_update(struct zone *zone);
  extern void zone_pcp_reset(struct zone *zone);
  extern void zone_pcp_disable(struct zone *zone);