diff mbox series

[02/17] mm: stub out all of swapops.h for !CONFIG_MMU

Message ID 20190624054311.30256-3-hch@lst.de (mailing list archive)
State New, archived
Headers show
Series [01/17] mm: provide a print_vma_addr stub for !CONFIG_MMU | expand

Commit Message

Christoph Hellwig June 24, 2019, 5:42 a.m. UTC 
The whole header file deals with swap entries and PTEs, none of which
can exist for nommu builds.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 include/linux/swapops.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/include/linux/swapops.h b/include/linux/swapops.h
index 4d961668e5fc..b02922556846 100644
--- a/include/linux/swapops.h
+++ b/include/linux/swapops.h
@@ -6,6 +6,8 @@ 
 #include <linux/bug.h>
 #include <linux/mm_types.h>
 
+#ifdef CONFIG_MMU
+
 /*
  * swapcache pages are stored in the swapper_space radix tree.  We want to
  * get good packing density in that tree, so the index should be dense in
@@ -50,13 +52,11 @@  static inline pgoff_t swp_offset(swp_entry_t entry)
 	return entry.val & SWP_OFFSET_MASK;
 }
 
-#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);
 }
-#endif
 
 /*
  * Convert the arch-dependent pte representation of a swp_entry_t into an
@@ -375,4 +375,5 @@  static inline int non_swap_entry(swp_entry_t entry)
 }
 #endif
 
+#endif /* CONFIG_MMU */
 #endif /* _LINUX_SWAPOPS_H */