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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2018-08-18 01:45:15 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-18 02:20:28 +0300
commit10ed63415223b16d7e80ba528556500231814232 (patch)
tree22ecf348400d79f8f95beef7b6eadf8bc92a0ce4 /include/linux/page_ext.h
parentb3a2369692fedcc439dfaa4f215cf5323a886c88 (diff)
downloadlinux-10ed63415223b16d7e80ba528556500231814232.tar.xz
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>
Diffstat (limited to 'include/linux/page_ext.h')
-rw-r--r--include/linux/page_ext.h4
1 files changed, 2 insertions, 2 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;
}