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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2015-02-11 15:26:41 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-11 17:06:03 -0800 |
| commit | d016bf7ece53b2b947bfd769e0842fd2feb7556b (patch) | |
| tree | 2b419f2baa1f9b67f1a3f1b312d7a838bfb0bef0 /arch/frv/include | |
| parent | 3ae3ad4e639234a43fd3997887524d2e5345fa76 (diff) | |
| download | lwn-d016bf7ece53b2b947bfd769e0842fd2feb7556b.tar.gz lwn-d016bf7ece53b2b947bfd769e0842fd2feb7556b.zip | |
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>
Diffstat (limited to 'arch/frv/include')
| -rw-r--r-- | arch/frv/include/asm/pgtable.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/frv/include/asm/pgtable.h b/arch/frv/include/asm/pgtable.h index c49699d5902d..93bcf2abd1a1 100644 --- a/arch/frv/include/asm/pgtable.h +++ b/arch/frv/include/asm/pgtable.h @@ -140,7 +140,7 @@ extern unsigned long empty_zero_page; #define PTRS_PER_PTE 4096 #define USER_PGDS_IN_LAST_PML4 (TASK_SIZE / PGDIR_SIZE) -#define FIRST_USER_ADDRESS 0 +#define FIRST_USER_ADDRESS 0UL #define USER_PGD_PTRS (PAGE_OFFSET >> PGDIR_SHIFT) #define KERNEL_PGD_PTRS (PTRS_PER_PGD - USER_PGD_PTRS) |