prctl.2: Fixes to Dave Martin's patch

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

diff --git a/man2/prctl.2 b/man2/prctl.2
index 14e75d540e2f2f9390b00e6fc2fe2d944da11081..c9d66811c8696b1e578fcd1ccaf95dfeaa038033 100644 (file)
--- a/man2/prctl.2
+++ b/man2/prctl.2
@@ -984,7 +984,7 @@ generic authentication \(lqA\(rq key.
 .IP
 As a special case, if
 .I arg2
-is zero then all the keys are reset.
+is zero, then all the keys are reset.
 Since new keys could be added in future,
 this is the recommended way to completely wipe the existing keys
 when establishing a clean execution context.
@@ -997,7 +997,7 @@ since
 resets all the pointer authentication keys.
 .IP
 The remaining arguments
-.IR arg3 ", " arg4 " and " arg5
+.IR arg3 ", " arg4 ", and " arg5
 must all be zero.
 .IP
 If the arguments are invalid,
@@ -1005,13 +1005,16 @@ and in particular if
 .I arg2
 contains set bits that are unrecognized
 or that correspond to a key not available on this platform,
-the call fails with error
+then the call fails with error
 .BR EINVAL .
 .IP
 .B Warning:
 Because the compiler or run-time environment
 may be using some or all of the keys,
 a successful
+may crash the calling process.
+The conditions for using it safely are complex and system-dependent.
+Don't use it unless you know what you are doing.
 .IP
 For more information, see the kernel source file
 .I Documentation/arm64/pointer\-authentication.rst
@@ -1020,9 +1023,6 @@ For more information, see the kernel source file
 .I Documentation/arm64/pointer\-authentication.txt
 before Linux 5.3).
 .B PR_PAC_RESET_KEYS
-may crash the calling process.
-The conditions for using it safely are complex and system-dependent.
-Don't use it unless you know what you are doing.
 .\" prctl PR_SET_PDEATHSIG
 .TP
 .BR PR_SET_PDEATHSIG " (since Linux 2.1.57)"