diff options
| 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/arm/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/arm/include')
| -rw-r--r-- | arch/arm/include/asm/pgtable-nommu.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/include/asm/pgtable-nommu.h b/arch/arm/include/asm/pgtable-nommu.h index c35e53ee6663..add094d09e3e 100644 --- a/arch/arm/include/asm/pgtable-nommu.h +++ b/arch/arm/include/asm/pgtable-nommu.h @@ -85,7 +85,7 @@ extern unsigned int kobjsize(const void *objp); #define VMALLOC_START 0UL #define VMALLOC_END 0xffffffffUL -#define FIRST_USER_ADDRESS (0) +#define FIRST_USER_ADDRESS 0UL #include <asm-generic/pgtable.h> |