diff --git a/Documentation/filesystems/jfs.txt b/Documentation/filesystems/jfs.txt
index 26ebde7..2f94f9c 100644
--- a/Documentation/filesystems/jfs.txt
+++ b/Documentation/filesystems/jfs.txt
@@ -3,6 +3,7 @@
 JFS Homepage:  http://jfs.sourceforge.net/
 
 The following mount options are supported:
+(*) == default
 
 iocharset=name	Character set to use for converting from Unicode to
 		ASCII.  The default is to do no conversion.  Use
@@ -21,12 +22,12 @@
 		from backup media.  The integrity of the volume is not
 		guaranteed if the system abnormally abends.
 
-integrity	Default.  Commit metadata changes to the journal.  Use this
-		option to remount a volume where the nointegrity option was
+integrity(*)	Commit metadata changes to the journal.  Use this option to
+		remount a volume where the nointegrity option was
 		previously specified in order to restore normal behavior.
 
 errors=continue		Keep going on a filesystem error.
-errors=remount-ro	Default. Remount the filesystem read-only on an error.
+errors=remount-ro(*)	Remount the filesystem read-only on an error.
 errors=panic		Panic and halt the machine if an error occurs.
 
 uid=value	Override on-disk uid with specified value
@@ -35,6 +36,18 @@
 		directories, the execute bit will be set if the corresponding
 		read bit is set.
 
+discard=minlen	This enables/disables the use of discard/TRIM commands.
+discard		The discard/TRIM commands are sent to the underlying
+nodiscard(*)	block device when blocks are freed. This is useful for SSD
+		devices and sparse/thinly-provisioned LUNs.  The FITRIM ioctl
+		command is also available together with the nodiscard option.
+		The value of minlen specifies the minimum blockcount, when
+		a TRIM command to the block device is considered usefull.
+		When no value is given to the discard option, it defaults to
+		64 blocks, which means 256KiB in JFS.
+		The minlen value of discard overrides the minlen value given
+		on an FITRIM ioctl().
+
 Please send bugs, comments, cards and letters to shaggy@linux.vnet.ibm.com.
 
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