Commit 6e65aa55 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle) Committed by Andrew Morton
Browse files

mm: make page_ext_get() take a const argument 

In order to constify other functions, we need page_ext_get() to be const. 
This is no problem as lookup_page_ext() already takes a const argument.

Link: https://lkml.kernel.org/r/20240326171045.410737-4-willy@infradead.org


Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent fa92722e

include/linux/page_ext.h

+2 −2
Original line number Diff line number Diff line
@@ -77,7 +77,7 @@ static inline void page_ext_init(void) 
}

#endif



extern struct page_ext *page_ext_get(struct page *page);

extern struct page_ext *page_ext_get(const struct page *page);

extern void page_ext_put(struct page_ext *page_ext);



static inline void *page_ext_data(struct page_ext *page_ext,
@@ -117,7 +117,7 @@ static inline void page_ext_init_flatmem(void) 
{

}



static inline struct page_ext *page_ext_get(struct page *page)

static inline struct page_ext *page_ext_get(const struct page *page)

{

	return NULL;

}

include/linux/pgalloc_tag.h

+0 −2
Original line number Diff line number Diff line
@@ -12,8 +12,6 @@ 
#include <linux/page_ext.h>



extern struct page_ext_operations page_alloc_tagging_ops;

extern struct page_ext *page_ext_get(struct page *page);

extern void page_ext_put(struct page_ext *page_ext);



static inline union codetag_ref *codetag_ref_from_page_ext(struct page_ext *page_ext)

{

mm/page_ext.c

+1 −1
Original line number Diff line number Diff line
@@ -514,7 +514,7 @@ void __meminit pgdat_page_ext_init(struct pglist_data *pgdat) 
 * Context: Any context.  Caller may not sleep until they have called

 * page_ext_put().

 */

struct page_ext *page_ext_get(struct page *page)

struct page_ext *page_ext_get(const struct page *page)

{

	struct page_ext *page_ext;