From 698dd4ba6b12e34e1e432c944c01478c0b2cd773 Mon Sep 17 00:00:00 2001 From: Matt Mackall Date: Mon, 4 Feb 2008 22:29:00 -0800 Subject: maps4: move is_swap_pte Move is_swap_pte helper function to swapops.h for use by pagemap code Signed-off-by: Matt Mackall Cc: Dave Hansen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/swapops.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux/swapops.h') diff --git a/include/linux/swapops.h b/include/linux/swapops.h index ceb6cc5ceebb..7bf2d149d209 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. -- cgit v1.2.3