[mmotm:master 371/385] arch/x86/mm/mpx.c:71:54: sparse: implicit cast to nocast type

[kbuild test robot <fengguang.wu@intel.com>]

tree:   git://git.cmpxchg.org/linux-mmotm.git master
head:   61f5f835b6f06fbc233481b5d3c0afd71ecf54e8
commit: b9e95c5dd1134d35b6c9aeaa3967ab5b3945ba73 [371/385] mm, mpx: add "vm_flags_t vm_flags" arg to do_mmap_pgoff()
reproduce:
  # apt-get install sparse
  git checkout b9e95c5dd1134d35b6c9aeaa3967ab5b3945ba73
  make ARCH=x86_64 allmodconfig
  make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

>> arch/x86/mm/mpx.c:71:54: sparse: implicit cast to nocast type
   arch/x86/mm/mpx.c:312:27: sparse: incompatible types in comparison expression (different address spaces)
--
>> include/linux/mm.h:1812:54: sparse: implicit cast to nocast type
--
   mm/mmap.c:1343:47: sparse: implicit cast to nocast type
   mm/mmap.c:1345:45: sparse: implicit cast to nocast type
   mm/mmap.c:1354:45: sparse: implicit cast to nocast type
   mm/mmap.c:1375:47: sparse: implicit cast to nocast type
   mm/mmap.c:1395:37: sparse: implicit cast to nocast type
   mm/mmap.c:1399:37: sparse: implicit cast to nocast type
   mm/mmap.c:1443:33: sparse: implicit cast to nocast type
   mm/mmap.c:1578:29: sparse: implicit cast to nocast type
   mm/internal.h:253:43: sparse: implicit cast to nocast type
   mm/mmap.c:2650:37: sparse: implicit cast to nocast type
   mm/mmap.c:2690:34: sparse: implicit cast to nocast type
   mm/mmap.c:2693:34: sparse: implicit cast to nocast type
>> include/linux/mm.h:1812:54: sparse: implicit cast to nocast type
   mm/internal.h:253:43: sparse: implicit cast to nocast type

vim +71 arch/x86/mm/mpx.c

    55	 * bounds tables (the bounds directory is user-allocated).
    56	 *
    57	 * Later on, we use the vma->vm_ops to uniquely identify these
    58	 * VMAs.
    59	 */
    60	static unsigned long mpx_mmap(unsigned long len)
    61	{
    62		struct mm_struct *mm = current->mm;
    63		unsigned long addr, populate;
    64	
    65		/* Only bounds table can be allocated here */
    66		if (len != mpx_bt_size_bytes(mm))
    67			return -EINVAL;
    68	
    69		down_write(&mm->mmap_sem);
    70		addr = do_mmap(NULL, 0, len, PROT_READ | PROT_WRITE,
  > 71				MAP_ANONYMOUS | MAP_PRIVATE, VM_MPX, 0, &populate);
    72		up_write(&mm->mmap_sem);
    73		if (populate)
    74			mm_populate(addr, populate);
    75	
    76		return addr;
    77	}
    78	
    79	enum reg_type {

---
0-DAY kernel test infrastructure                Open Source Technology Center
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