virt_to_page() is typically implemented as a macro containing a cast so
it'll accept both pointers and unsigned long without causing a warning.
MIPS virt_to_page() uses virt_to_phys which is a function so passing an
unsigned long will cause a warning:
CC mm/page_alloc.o
/home/ralf/src/linux/linux-mips/mm/page_alloc.c: In function ‘free_reserved_area’:
/home/ralf/src/linux/linux-mips/mm/page_alloc.c:5161:3: warning: passing argument 1 of ‘virt_to_phys’ makes pointer from integer without a cast [enabled by default]
In file included from /home/ralf/src/linux/linux-mips/arch/mips/include/asm/page.h:153:0,
from /home/ralf/src/linux/linux-mips/include/linux/mmzone.h:20,
from /home/ralf/src/linux/linux-mips/include/linux/gfp.h:4,
from /home/ralf/src/linux/linux-mips/include/linux/mm.h:8,
from /home/ralf/src/linux/linux-mips/mm/page_alloc.c:18:
/home/ralf/src/linux/linux-mips/arch/mips/include/asm/io.h:119:100: note: expected ‘const volatile void *’ but argument is of type ‘long unsigned int’
All others users of virt_to_page() in mm/ are passing a void *.
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Reported-by: Eunbong Song <eunb.song@xxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-mm@xxxxxxxxx
Cc: linux-mips@xxxxxxxxxxxxxx
---
mm/page_alloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 98cbdf6..378a15b 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5158,7 +5158,7 @@ unsigned long free_reserved_area(unsigned long start, unsigned long end,
for (pages = 0; pos < end; pos += PAGE_SIZE, pages++) {
if (poison)
memset((void *)pos, poison, PAGE_SIZE);
- free_reserved_page(virt_to_page(pos));
+ free_reserved_page(virt_to_page((void *)pos));
}
if (pages && s)
