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-.TH MLOCK 2 2011-09-10 "Linux" "Linux Programmer's Manual"
+.TH MLOCK 2 2011-09-14 "Linux" "Linux Programmer's Manual"
.SH NAME
mlock, munlock, mlockall, munlockall \- lock and unlock memory
.SH SYNOPSIS
Some or all of the specified address range could not be locked.
.TP
.B EINVAL
-.I len
-was negative.
+The result of the addition
+.IR start + len
+was less than
+.IR start
+(e.g., the addition may have resuled in an overflow).
.TP
.B EINVAL
(Not on Linux)