diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2018-08-17 15:45:15 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-17 16:20:28 -0700 |
| commit | 10ed63415223b16d7e80ba528556500231814232 (patch) | |
| tree | 22ecf348400d79f8f95beef7b6eadf8bc92a0ce4 | |
| parent | b3a2369692fedcc439dfaa4f215cf5323a886c88 (diff) | |
mm/page_ext.c: constify lookup_page_ext() argument
lookup_page_ext() finds 'struct page_ext' for a given page. It requires
only read access to the given struct page.
Current implemnentation takes 'struct page *' as an argument. It makes
compiler complain when 'const struct page *' passed.
Change the argument to 'const struct page *'.
Link: http://lkml.kernel.org/r/20180531135457.20167-3-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Vinayak Menon <vinmenon@codeaurora.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/page_ext.h | 4 | ||||
| -rw-r--r-- | mm/page_ext.c | 4 |
2 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/page_ext.h b/include/linux/page_ext.h index bbec618a614b..f84f167ec04c 100644 --- a/include/linux/page_ext.h +++ b/include/linux/page_ext.h @@ -50,7 +50,7 @@ static inline void page_ext_init(void) } #endif -struct page_ext *lookup_page_ext(struct page *page); +struct page_ext *lookup_page_ext(const struct page *page); #else /* !CONFIG_PAGE_EXTENSION */ struct page_ext; @@ -59,7 +59,7 @@ static inline void pgdat_page_ext_init(struct pglist_data *pgdat) { } -static inline struct page_ext *lookup_page_ext(struct page *page) +static inline struct page_ext *lookup_page_ext(const struct page *page) { return NULL; } diff --git a/mm/page_ext.c b/mm/page_ext.c index 5295ef331165..a9826da84ccb 100644 --- a/mm/page_ext.c +++ b/mm/page_ext.c @@ -120,7 +120,7 @@ void __meminit pgdat_page_ext_init(struct pglist_data *pgdat) pgdat->node_page_ext = NULL; } -struct page_ext *lookup_page_ext(struct page *page) +struct page_ext *lookup_page_ext(const struct page *page) { unsigned long pfn = page_to_pfn(page); unsigned long index; @@ -195,7 +195,7 @@ fail: #else /* CONFIG_FLAT_NODE_MEM_MAP */ -struct page_ext *lookup_page_ext(struct page *page) +struct page_ext *lookup_page_ext(const struct page *page) { unsigned long pfn = page_to_pfn(page); struct mem_section *section = __pfn_to_section(pfn); |