X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fswapops.h;h=6ec39ab27b4b48aaf31b02a19bf5a164217abcce;hb=13c48c490208d9e70d8d66d56f96c5054db69af7;hp=ceb6cc5ceebbee56b69107daad587c512987794f;hpb=b643b0fdbc59cf6bbb086974b29d2571e9e9f646;p=linux-2.6

diff --git a/include/linux/swapops.h b/include/linux/swapops.h
index ceb6cc5cee..6ec39ab27b 100644
--- a/include/linux/swapops.h
+++ b/include/linux/swapops.h
@@ -42,6 +42,14 @@ static inline pgoff_t swp_offset(swp_entry_t entry)
 	return entry.val & SWP_OFFSET_MASK(entry);
 }
 
+#ifdef CONFIG_MMU
+/* 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);
+}
+#endif
+
 /*
  * Convert the arch-dependent pte representation of a swp_entry_t into an
  * arch-independent swp_entry_t.