mm/z3fold.c: use gfpflags_allow_blocking

We have a perfectly good macro to determine whether the gfp flags allow
you to sleep or not; use it instead of trying to infer it.

Link: http://lkml.kernel.org/r/20180408062206.GC16007@bombadil.infradead.org
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Vitaly Wool <vitalywool@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/z3fold.c b/mm/z3fold.c
index c6b1fb0..c0bca61 100644 (file)
--- a/mm/z3fold.c
+++ b/mm/z3fold.c
@@ -538,7 +538,7 @@ static int z3fold_alloc(struct z3fold_pool *pool, size_t size, gfp_t gfp,
        struct z3fold_header *zhdr = NULL;
        struct page *page = NULL;
        enum buddy bud;
-       bool can_sleep = (gfp & __GFP_RECLAIM) == __GFP_RECLAIM;
+       bool can_sleep = gfpflags_allow_blocking(gfp);
 
        if (!size || (gfp & __GFP_HIGHMEM))
                return -EINVAL;