diff options
| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-06-25 09:52:59 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-06-25 09:52:59 +0100 |
| commit | d1e16c1a61d68692dba346f4a841315343b085f4 (patch) | |
| tree | 249ec07d1489769fe83b4ec507708455cc0c5138 /include/linux/swapops.h | |
| parent | 1573ee81cb9ef24fa5acee6b7442e215e63ede2f (diff) | |
| parent | 6b16351acbd415e66ba16bf7d473ece1574cf0bc (diff) | |
Merge tag 'v3.5-rc4' into for-3.6
Linux 3.5-rc4 contains some bug fixes which overlap with new features.
Diffstat (limited to 'include/linux/swapops.h')
| -rw-r--r-- | include/linux/swapops.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/include/linux/swapops.h b/include/linux/swapops.h index 792d16d9cbc7..47ead515c811 100644 --- a/include/linux/swapops.h +++ b/include/linux/swapops.h @@ -9,13 +9,15 @@ * get good packing density in that tree, so the index should be dense in * the low-order bits. * - * We arrange the `type' and `offset' fields so that `type' is at the five + * We arrange the `type' and `offset' fields so that `type' is at the seven * high-order bits of the swp_entry_t and `offset' is right-aligned in the - * remaining bits. + * remaining bits. Although `type' itself needs only five bits, we allow for + * shmem/tmpfs to shift it all up a further two bits: see swp_to_radix_entry(). * * swp_entry_t's are *never* stored anywhere in their arch-dependent format. */ -#define SWP_TYPE_SHIFT(e) (sizeof(e.val) * 8 - MAX_SWAPFILES_SHIFT) +#define SWP_TYPE_SHIFT(e) ((sizeof(e.val) * 8) - \ + (MAX_SWAPFILES_SHIFT + RADIX_TREE_EXCEPTIONAL_SHIFT)) #define SWP_OFFSET_MASK(e) ((1UL << SWP_TYPE_SHIFT(e)) - 1) /* |