diff --git a/man2/prctl.2 b/man2/prctl.2
index 27d9aec15..0b00605d8 100644
--- a/man2/prctl.2
+++ b/man2/prctl.2
@@ -1009,10 +1009,9 @@ See
 .BR capabilities (7).
 .TP
 .BR PR_GET_SPECULATION_CTRL
-Returns the state of the speculation misfeature which is selected with
-the value of
-.IR arg2 ,
-which must be
+Returns the state of the speculation misfeature specified in
+.IR arg2 .
+Currently, the only permitted value for this argument is
 .BR PR_SPEC_STORE_BYPASS
 (otherwise the call fails with the error
 .BR ENODEV ).
@@ -1045,26 +1044,27 @@ is set, then per-thread control of the mitigation is available.
 If not set,
 .BR prctl ()
 for the speculation misfeature will fail.
-In the above operation
+.IP
+The
 .IR arg3 ,
 .IR arg4 ,
 and
 .I arg5
-must be specified as 0, otherwise the call fails with the error
+arguments must be specified as 0; otherwise the call fails with the error
 .BR EINVAL .
 .TP
 .BR PR_SET_SPECULATION_CTRL
-Sets the state of the speculation misfeature which is selected with
-the value of
-.IR arg2 ,
-which must be
+Sets the state of the speculation misfeature specified in
+.IR arg2 .
+Currently, the only permitted value for this argument is
 .B PR_SPEC_STORE_BYPASS
 (otherwise the call fails with the error
 .BR ENODEV ).
-This control is per thread.
+This setting is a per-thread attribute.
 The
 .IR arg3
-argument is used to hand in the control value, which can be either:
+argument is used to hand in the control value,
+which is one of the following:
 .RS
 .TP
 .BR PR_SPEC_ENABLE
@@ -1088,23 +1088,23 @@ Any other value in
 .IR arg3
 will result in the call failing with the error
 .BR ERANGE .
-Also
+.IP
+The
 .I arg4
 and
 .I arg5
-must be specified as 0, otherwise the call fails with the rror
+arguments must be specified as 0; otherwise the call fails with the error
 .BR EINVAL .
 .IP
-Furtheremore this speculation feature can also be controlled by the boot-time
-parameter of
-.B
-spec_store_bypass_disable=
-Which could enforce a read-only policy which will result in the call failure
-with the error
+The speculation feature can also be controlled by the
+.B spec_store_bypass_disable
+boot parameter.
+This parameter may enforce a read-only policy which will result in the
+.BR prctl (2)
+call failing with the error
 .BR ENXIO .
-Consult the
-.B PR_GET_SPECULATION_CTRL
-for details on the possible enumerations.
+For further details, see the kernel source file
+.IR Documentation/admin-guide/kernel-parameters.txt .
 .TP
 .BR PR_SET_THP_DISABLE " (since Linux 3.15)"
 .\" commit a0715cc22601e8830ace98366c0c2bd8da52af52
@@ -1698,13 +1698,11 @@ was
 .BR PR_SET_SPECULATION_CTRL
 and
 .IR arg3
-is incorrect - neither
-.B PR_SPEC_ENABLE
+is neither
+.BR PR_SPEC_ENABLE ,
+.BR PR_SPEC_DISABLE ,
 nor
-.B PR_SPEC_DISABLE
-nor
-.B PR_SPEC_FORCE_DISABLE
-was choosen
+.BR PR_SPEC_FORCE_DISABLE .
 .TP
 .B EINVAL
 .I option