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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2024-03-26 20:10:25 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-04-26 06:56:14 +0300 |
| commit | 6e65aa55cdf4c7cc0490b156b4aae2035c157140 (patch) | |
| tree | ff4339cc09c9d9e072ec14536abc0f33a4de30a5 | |
| parent | fa92722e382b3926a371d7432bbfde5efee2f2be (diff) | |
| download | linux-6e65aa55cdf4c7cc0490b156b4aae2035c157140.tar.xz | |
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: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | include/linux/page_ext.h | 4 | ||||
| -rw-r--r-- | include/linux/pgalloc_tag.h | 2 | ||||
| -rw-r--r-- | mm/page_ext.c | 2 |
3 files changed, 3 insertions, 5 deletions
diff --git a/include/linux/page_ext.h b/include/linux/page_ext.h index 07e0656898f9..e4b48a0dda24 100644 --- a/include/linux/page_ext.h +++ b/include/linux/page_ext.h @@ -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; } diff --git a/include/linux/pgalloc_tag.h b/include/linux/pgalloc_tag.h index 62d8dad74b37..86ba5d33e43b 100644 --- a/include/linux/pgalloc_tag.h +++ b/include/linux/pgalloc_tag.h @@ -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) { diff --git a/mm/page_ext.c b/mm/page_ext.c index e7d8f1a5589e..95dd8ffeaf81 100644 --- a/mm/page_ext.c +++ b/mm/page_ext.c @@ -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; |