Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 updates from Ted Ts'o:
 "Scalability improvements when allocating inodes, and some
  miscellaneous bug fixes and cleanups"

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: avoid Y2038 overflow in recently_deleted()
  ext4: fix fault handling when mounted with -o dax,ro
  ext4: fix quota inconsistency during orphan cleanup for read-only mounts
  ext4: fix incorrect quotaoff if the quota feature is enabled
  ext4: remove useless test and assignment in strtohash functions
  ext4: backward compatibility support for Lustre ea_inode implementation
  ext4: remove timebomb in ext4_decode_extra_time()
  ext4: use sizeof(*ptr)
  ext4: in ext4_seek_{hole,data}, return -ENXIO for negative offsets
  ext4: reduce lock contention in __ext4_new_inode
  ext4: cleanup goto next group
  ext4: do not unnecessarily allocate buffer in recently_deleted()

1 files changed, 15 insertions, 0 deletions

diff --git a/include/linux/time.h b/include/linux/time.h
index 4abb32d4c6b8..3877136bbdf8 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -285,4 +285,19 @@ static inline bool itimerspec64_valid(const struct itimerspec64 *its)
 	return true;
 }
 
+/**
+ * time_after32 - compare two 32-bit relative times
+ * @a:	the time which may be after @b
+ * @b:	the time which may be before @a
+ *
+ * time_after32(a, b) returns true if the time @a is after time @b.
+ * time_before32(b, a) returns true if the time @b is before time @a.
+ *
+ * Similar to time_after(), compare two 32-bit timestamps for relative
+ * times.  This is useful for comparing 32-bit seconds values that can't
+ * be converted to 64-bit values (e.g. due to disk format or wire protocol
+ * issues) when it is known that the times are less than 68 years apart.
+ */
+#define time_after32(a, b)	((s32)((u32)(b) - (u32)(a)) < 0)
+#define time_before32(b, a)	time_after32(a, b)
 #endif