mm: add casts to/from gfp_t in gfp_to_alloc_flags()

This removes following warning from sparse:

 mm/page_alloc.c:1934:9: warning: restricted gfp_t degrades to integer

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index b13bc5e5bd7d9213bcb6ac839310c6ba0aba1590..07a654486f75cfdfe13035f7bf501e2d2dbf0a4a 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1932,7 +1932,7 @@ gfp_to_alloc_flags(gfp_t gfp_mask)
        const gfp_t wait = gfp_mask & __GFP_WAIT;
 
        /* __GFP_HIGH is assumed to be the same as ALLOC_HIGH to save a branch. */
-       BUILD_BUG_ON(__GFP_HIGH != ALLOC_HIGH);
+       BUILD_BUG_ON(__GFP_HIGH != (__force gfp_t) ALLOC_HIGH);
 
        /*
         * The caller may dip into page reserves a bit more if the caller
@@ -1940,7 +1940,7 @@ gfp_to_alloc_flags(gfp_t gfp_mask)
         * policy or is asking for __GFP_HIGH memory.  GFP_ATOMIC requests will
         * set both ALLOC_HARDER (!wait) and ALLOC_HIGH (__GFP_HIGH).
         */
-       alloc_flags |= (gfp_mask & __GFP_HIGH);
+       alloc_flags |= (__force int) (gfp_mask & __GFP_HIGH);
 
        if (!wait) {
                alloc_flags |= ALLOC_HARDER;