mm: make FIRST_USER_ADDRESS unsigned long on all archs

LKP has triggered a compiler warning after my recent patch "mm: account
pmd page tables to the process":

    mm/mmap.c: In function 'exit_mmap':
 >> mm/mmap.c:2857:2: warning: right shift count >= width of type [enabled by default]

The code:

 > 2857                WARN_ON(mm_nr_pmds(mm) >
   2858                                round_up(FIRST_USER_ADDRESS, PUD_SIZE) >> PUD_SHIFT);

In this, on tile, we have FIRST_USER_ADDRESS defined as 0.  round_up() has
the same type -- int.  PUD_SHIFT.

I think the best way to fix it is to define FIRST_USER_ADDRESS as unsigned
long.  On every arch for consistency.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 2 insertions, 2 deletions

diff --git a/arch/sparc/include/asm/pgtable_32.h b/arch/sparc/include/asm/pgtable_32.h
index 9912eb0b499a..f06b36a00a3b 100644
--- a/arch/sparc/include/asm/pgtable_32.h
+++ b/arch/sparc/include/asm/pgtable_32.h
@@ -44,7 +44,7 @@ unsigned long __init bootmem_init(unsigned long *pages_avail);
 #define PTRS_PER_PMD            SRMMU_PTRS_PER_PMD
 #define PTRS_PER_PGD            SRMMU_PTRS_PER_PGD
 #define USER_PTRS_PER_PGD       PAGE_OFFSET / SRMMU_PGDIR_SIZE
-#define FIRST_USER_ADDRESS      0
+#define FIRST_USER_ADDRESS      0UL
 #define PTE_SIZE                (PTRS_PER_PTE*4)
 
 #define PAGE_NONE       SRMMU_PAGE_NONE
diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
index 2ac7873ad6fd..dc165ebdf05a 100644
--- a/arch/sparc/include/asm/pgtable_64.h
+++ b/arch/sparc/include/asm/pgtable_64.h
@@ -93,7 +93,7 @@ bool kern_addr_valid(unsigned long addr);
 #define PTRS_PER_PGD    (1UL << PGDIR_BITS)
 
 /* Kernel has a separate 44bit address space. */
-#define FIRST_USER_ADDRESS      0
+#define FIRST_USER_ADDRESS      0UL
 
 #define pmd_ERROR(e)                                                    \
         pr_err("%s:%d: bad pmd %p(%016lx) seen at (%pS)\n",             \