--- IO-AIO/AIO.xs	2016/05/01 17:19:39	1.241
+++ IO-AIO/AIO.xs	2017/05/30 22:45:52	1.244
@@ -23,7 +23,8 @@
 
 /* the incompetent fool that created musl keeps __linux__, refuses
  * to implement any linux standard apis, and also has no way to test
- * for his broken iplementation. on't complain if this fails for you.
+ * for his broken iplementation. don't complain to me if this fails
+ * for you.
  */
 #if __linux__ && (defined __GLIBC__ || defined __UCLIBC__)
 # include <linux/fs.h>
@@ -925,6 +926,7 @@
     const_niv (MADV_RANDOM    , POSIX_MADV_RANDOM)
     const_niv (MADV_WILLNEED  , POSIX_MADV_WILLNEED)
     const_niv (MADV_DONTNEED  , POSIX_MADV_DONTNEED)
+    const_niv (MADV_FREE      , POSIX_MADV_FREE)
 
     /* the second block will be 0 when missing */
     const_iv (O_RDONLY)
@@ -996,6 +998,63 @@
     const_iv (MAP_HUGETLB)
     const_iv (MAP_STACK)
 
+    const_iv (FIFREEZE)
+    const_iv (FITHAW)
+    const_iv (FITRIM)
+    const_iv (FICLONE)
+    const_iv (FICLONERANGE)
+    const_iv (FIDEDUPERANGE)
+
+    const_iv (FS_IOC_GETFLAGS)
+    const_iv (FS_IOC_SETFLAGS)
+    const_iv (FS_IOC_GETVERSION)
+    const_iv (FS_IOC_SETVERSION)
+    const_iv (FS_IOC_FIEMAP)
+    const_iv (FS_IOC_FSGETXATTR)
+    const_iv (FS_IOC_FSSETXATTR)
+    const_iv (FS_IOC_SET_ENCRYPTION_POLICY)
+    const_iv (FS_IOC_GET_ENCRYPTION_PWSALT)
+    const_iv (FS_IOC_GET_ENCRYPTION_POLICY)
+
+    const_iv (FS_KEY_DESCRIPTOR_SIZE)
+
+    const_iv (FS_SECRM_FL)
+    const_iv (FS_UNRM_FL)
+    const_iv (FS_COMPR_FL)
+    const_iv (FS_SYNC_FL)
+    const_iv (FS_IMMUTABLE_FL)
+    const_iv (FS_APPEND_FL)
+    const_iv (FS_NODUMP_FL)
+    const_iv (FS_NOATIME_FL)
+    const_iv (FS_DIRTY_FL)
+    const_iv (FS_COMPRBLK_FL)
+    const_iv (FS_NOCOMP_FL)
+    const_iv (FS_ENCRYPT_FL)
+    const_iv (FS_BTREE_FL)
+    const_iv (FS_INDEX_FL)
+    const_iv (FS_JOURNAL_DATA_FL)
+    const_iv (FS_NOTAIL_FL)
+    const_iv (FS_DIRSYNC_FL)
+    const_iv (FS_TOPDIR_FL)
+    const_iv (FS_FL_USER_MODIFIABLE)
+
+    const_iv (FS_XFLAG_REALTIME)
+    const_iv (FS_XFLAG_PREALLOC)
+    const_iv (FS_XFLAG_IMMUTABLE)
+    const_iv (FS_XFLAG_APPEND)
+    const_iv (FS_XFLAG_SYNC)
+    const_iv (FS_XFLAG_NOATIME)
+    const_iv (FS_XFLAG_NODUMP)
+    const_iv (FS_XFLAG_RTINHERIT)
+    const_iv (FS_XFLAG_PROJINHERIT)
+    const_iv (FS_XFLAG_NOSYMLINKS)
+    const_iv (FS_XFLAG_EXTSIZE)
+    const_iv (FS_XFLAG_EXTSZINHERIT)
+    const_iv (FS_XFLAG_NODEFRAG)
+    const_iv (FS_XFLAG_FILESTREAM)
+    const_iv (FS_XFLAG_DAX)
+    const_iv (FS_XFLAG_HASATTR)
+
     const_iv (FIEMAP_FLAG_SYNC)
     const_iv (FIEMAP_FLAG_XATTR)
     const_iv (FIEMAP_FLAGS_COMPAT)
@@ -1548,7 +1607,7 @@
 }
 
 void
-aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback = &PL_sv_undef)
+aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = -1, SV *callback = &PL_sv_undef)
         ALIAS:
            aio_mtouch = EIO_MTOUCH
            aio_msync  = EIO_MSYNC
@@ -1558,6 +1617,9 @@
         char *svptr = SvPVbyte (data, svlen);
         UV len = SvUV (length);
 
+        if (flags < 0)
+          flags = ix == EIO_MSYNC ? EIO_MS_SYNC : 0;
+
         if (offset < 0)
           offset += svlen;