[PATCH] typeof __page_to_pfn with SPARSEMEM=y

With CONFIG_SPARSEMEM=y:

mm/rmap.c:579: warning: format '%lx' expects type 'long unsigned int', but argument 2 has type 'int'

Make __page_to_pfn() return unsigned long.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/asm-generic/memory_model.h b/include/asm-generic/memory_model.h
index 8078cbd..30d8d33 100644 (file)
--- a/include/asm-generic/memory_model.h
+++ b/include/asm-generic/memory_model.h
@@ -54,7 +54,7 @@
 #define __page_to_pfn(pg)                                      \
 ({     struct page *__pg = (pg);                               \
        int __sec = page_to_section(__pg);                      \
-       __pg - __section_mem_map_addr(__nr_to_section(__sec));  \
+       (unsigned long)(__pg - __section_mem_map_addr(__nr_to_section(__sec))); \
 })
 
 #define __pfn_to_page(pfn)                             \