{,set}page_address() are macros if WANT_PAGE_VIRTUAL.
If !WANT_PAGE_VIRTUAL, they're plain C functions.
If someone calls them with a void *, this pointer is auto-converted to
struct page * if !WANT_PAGE_VIRTUAL, but causes a build failure on
architectures using WANT_PAGE_VIRTUAL (arc, m68k and sparc):
drivers/md/bcache/bset.c: In function ‘__btree_sort’:
drivers/md/bcache/bset.c:1190: warning: dereferencing ‘void *’ pointer
drivers/md/bcache/bset.c:1190: error: request for member ‘virtual’ in something not a structure or union
Convert them to static inline functions to fix this. There are already
plenty of users of struct page members inside <linux/mm.h>, so there's no
reason to keep them as macros.
Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
---
http://kisskb.ellerman.id.au/kisskb/buildresult/10469287/ (m68k/next)
http://kisskb.ellerman.id.au/kisskb/buildresult/10469488/ (sparc64/next)
https://lkml.org/lkml/2014/1/13/1044 (m68k & sparc/3.10.27-stable)
include/linux/mm.h | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 35527173cf50..9fac6dd69b11 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -846,11 +846,14 @@ static __always_inline void *lowmem_page_address(const struct page *page)
#endif
#if defined(WANT_PAGE_VIRTUAL)
-#define page_address(page) ((page)->virtual)
-#define set_page_address(page, address) \
- do { \
- (page)->virtual = (address); \
- } while(0)
+static inline void *page_address(const struct page *page)
+{
+ return page->virtual;
+}
+static inline void set_page_address(struct page *page, void *address)
+{
+ page->virtual = address;
+}
#define page_address_init() do { } while(0)
#endif
--
1.7.9.5
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