diff options
| author | Matt Mackall <mpm@selenic.com> | 2008-02-04 22:29:00 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-05 09:44:16 -0800 |
| commit | 698dd4ba6b12e34e1e432c944c01478c0b2cd773 (patch) | |
| tree | fe524e3ae12b54968b363314ad45841abbd55d98 /include/linux/swapops.h | |
| parent | 824552574162ac00ae636fa41386b1072379ea4a (diff) | |
maps4: move is_swap_pte
Move is_swap_pte helper function to swapops.h for use by pagemap code
Signed-off-by: Matt Mackall <mpm@selenic.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/swapops.h')
| -rw-r--r-- | include/linux/swapops.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/swapops.h b/include/linux/swapops.h index ceb6cc5ceeb..7bf2d149d20 100644 --- a/include/linux/swapops.h +++ b/include/linux/swapops.h @@ -42,6 +42,12 @@ static inline pgoff_t swp_offset(swp_entry_t entry) return entry.val & SWP_OFFSET_MASK(entry); } +/* check whether a pte points to a swap entry */ +static inline int is_swap_pte(pte_t pte) +{ + return !pte_none(pte) && !pte_present(pte) && !pte_file(pte); +} + /* * Convert the arch-dependent pte representation of a swp_entry_t into an * arch-independent swp_entry_t. |