linux-kernel - [mingo-tip:sched/headers 1805/2579] include/linux/gfp_api.h:26:27: sparse: sparse: restricted gfp

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Date:   Mon, 25 Apr 2022 09:30:24 +0800
From:   kernel test robot <lkp@...el.com>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [mingo-tip:sched/headers 1805/2579] include/linux/gfp_api.h:26:27:
 sparse: sparse: restricted gfp_t degrades to integer

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git sched/headers
head:   49e1ec6c70a6eb4b7de9250a455b8b63eb42afbe
commit: ae3f246b57ee3809edbb8b4bc6f887cc0e9e2f9e [1805/2579] headers/deps: mm: Create <linux/gfp_api.h>
config: i386-randconfig-s001 (https://download.01.org/0day-ci/archive/20220425/202204250949.KPASl3Sz-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.2.0-20) 11.2.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git/commit/?id=ae3f246b57ee3809edbb8b4bc6f887cc0e9e2f9e
        git remote add mingo-tip git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git
        git fetch --no-tags mingo-tip sched/headers
        git checkout ae3f246b57ee3809edbb8b4bc6f887cc0e9e2f9e
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>


sparse warnings: (new ones prefixed by >>)
   mm/page_owner.c: note: in included file (through include/linux/mm.h, include/linux/mm_api.h):
>> include/linux/gfp_api.h:26:27: sparse: sparse: restricted gfp_t degrades to integer
>> include/linux/gfp_api.h:26:27: sparse: sparse: restricted gfp_t degrades to integer
>> include/linux/gfp_api.h:26:27: sparse: sparse: restricted gfp_t degrades to integer
--
   mm/compaction.c: note: in included file (through include/trace/trace_events.h, include/trace/define_trace.h, include/trace/events/compaction.h):
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast from restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: incorrect type in argument 3 (different base types) @@     expected unsigned long flags @@     got restricted gfp_t [usertype] gfp_mask @@
   include/trace/events/compaction.h:155:1: sparse:     expected unsigned long flags
   include/trace/events/compaction.h:155:1: sparse:     got restricted gfp_t [usertype] gfp_mask
   mm/compaction.c: note: in included file (through include/trace/trace_events.h, include/trace/define_trace.h, include/trace/events/compaction.h):
   include/trace/events/compaction.h:155:1: sparse: sparse: cast to restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: cast to restricted gfp_t
   include/trace/events/compaction.h:155:1: sparse: sparse: restricted gfp_t degrades to integer
   include/trace/events/compaction.h:155:1: sparse: sparse: restricted gfp_t degrades to integer
   mm/compaction.c:2619:39: sparse: sparse: incorrect type in initializer (different base types) @@     expected int may_perform_io @@     got restricted gfp_t @@
   mm/compaction.c:2619:39: sparse:     expected int may_perform_io
   mm/compaction.c:2619:39: sparse:     got restricted gfp_t
   mm/compaction.c:555:39: sparse: sparse: context imbalance in 'compact_unlock_should_abort' - unexpected unlock
   mm/compaction.c:675:39: sparse: sparse: context imbalance in 'isolate_freepages_block' - unexpected unlock
   mm/compaction.c: note: in included file (through include/linux/mm.h, include/linux/huge_mm.h):
>> include/linux/gfp_api.h:26:27: sparse: sparse: restricted gfp_t degrades to integer
--
   mm/page_alloc.c: note: in included file (through include/linux/mm.h, include/linux/huge_mm.h):
>> include/linux/gfp_api.h:26:27: sparse: sparse: restricted gfp_t degrades to integer
>> include/linux/gfp_api.h:26:27: sparse: sparse: restricted gfp_t degrades to integer
>> include/linux/gfp_api.h:26:27: sparse: sparse: restricted gfp_t degrades to integer
>> include/linux/gfp_api.h:26:27: sparse: sparse: restricted gfp_t degrades to integer
>> include/linux/gfp_api.h:26:27: sparse: sparse: restricted gfp_t degrades to integer
>> include/linux/gfp_api.h:26:27: sparse: sparse: restricted gfp_t degrades to integer

vim +26 include/linux/gfp_api.h

    15	
    16	static inline int gfp_migratetype(const gfp_t gfp_flags)
    17	{
    18		VM_WARN_ON((gfp_flags & GFP_MOVABLE_MASK) == GFP_MOVABLE_MASK);
    19		BUILD_BUG_ON((1UL << GFP_MOVABLE_SHIFT) != ___GFP_MOVABLE);
    20		BUILD_BUG_ON((___GFP_MOVABLE >> GFP_MOVABLE_SHIFT) != MIGRATE_MOVABLE);
    21	
    22		if (unlikely(page_group_by_mobility_disabled))
    23			return MIGRATE_UNMOVABLE;
    24	
    25		/* Group based on mobility */
  > 26		return (gfp_flags & GFP_MOVABLE_MASK) >> GFP_MOVABLE_SHIFT;
    27	}
    28	#undef GFP_MOVABLE_MASK
    29	#undef GFP_MOVABLE_SHIFT
    30	

-- 
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