arm64: hibernate: add __force attribute to gfp_t casting

Two new warnings are reported by sparse:

"sparse warnings: (new ones prefixed by >>)"
>> arch/arm64/kernel/hibernate.c:181:39: sparse: sparse: cast to
   restricted gfp_t
>> arch/arm64/kernel/hibernate.c:202:44: sparse: sparse: cast from
   restricted gfp_t

gfp_t has __bitwise type attribute and requires __force added to casting
in order to avoid these warnings.

Fixes: 50f53fb72181 ("arm64: trans_pgd: make trans_pgd_map_page generic")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Link: https://lore.kernel.org/r/20210201150306.54099-2-pasha.tatashin@soleen.com
Signed-off-by: Will Deacon <will@kernel.org>

diff --git a/arch/arm64/kernel/hibernate.c b/arch/arm64/kernel/hibernate.c
index 9df32ba..b1cef37 100644 (file)
--- a/arch/arm64/kernel/hibernate.c
+++ b/arch/arm64/kernel/hibernate.c
@@ -178,7 +178,7 @@ EXPORT_SYMBOL(arch_hibernation_header_restore);
 
 static void *hibernate_page_alloc(void *arg)
 {
-       return (void *)get_safe_page((gfp_t)(unsigned long)arg);
+       return (void *)get_safe_page((__force gfp_t)(unsigned long)arg);
 }
 
 /*
@@ -198,7 +198,7 @@ static int create_safe_exec_page(void *src_start, size_t length,
 {
        struct trans_pgd_info trans_info = {
                .trans_alloc_page       = hibernate_page_alloc,
-               .trans_alloc_arg        = (void *)GFP_ATOMIC,
+               .trans_alloc_arg        = (__force void *)GFP_ATOMIC,
        };
 
        void *page = (void *)get_safe_page(GFP_ATOMIC);