Linux 4.18 compat: inode timespec -> timespec64

Commit torvalds/linux@95582b0 changes the inode i_atime, i_mtime,
and i_ctime members form timespec's to timespec64's to make them
2038 safe.  As part of this change the current_time() function was
also updated to return the timespec64 type.

Resolve this issue by introducing a new inode_timespec_t type which
is defined to match the timespec type used by the inode.  It should
be used when working with inode timestamps to ensure matching types.

The timestruc_t type under Illumos was used in a similar fashion but
was specified to always be a timespec_t.  Rather than incorrectly
define this type all timespec_t types have been replaced by the new
inode_timespec_t type.

Finally, the kernel and user space 'sys/time.h' headers were aligned
with each other.  They define as appropriate for the context several
constants as macros and include static inline implementation of
gethrestime(), gethrestime_sec(), and gethrtime().

Reviewed-by: Chunwei Chen <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Closes #7643 

1 files changed, 3 insertions, 3 deletions

diff --git a/module/zfs/dsl_dir.c b/module/zfs/dsl_dir.c
index 4b85208d8..36abfe024 100644
--- a/module/zfs/dsl_dir.c
+++ b/module/zfs/dsl_dir.c
@@ -2126,10 +2126,10 @@ dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd,
 	return (0);
 }
 
-timestruc_t
+inode_timespec_t
 dsl_dir_snap_cmtime(dsl_dir_t *dd)
 {
-	timestruc_t t;
+	inode_timespec_t t;
 
 	mutex_enter(&dd->dd_lock);
 	t = dd->dd_snap_cmtime;
@@ -2141,7 +2141,7 @@ dsl_dir_snap_cmtime(dsl_dir_t *dd)
 void
 dsl_dir_snap_cmtime_update(dsl_dir_t *dd)
 {
-	timestruc_t t;
+	inode_timespec_t t;
 
 	gethrestime(&t);
 	mutex_enter(&dd->dd_lock);