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fix the description of return values. pointed by Martin Husemann. 

reviewed by toshii@
This commit is contained in:
yamt 2007-05-21 02:30:47 +00:00
parent a092715e1b
commit c2217bea1c
1 changed files with 11 additions and 5 deletions
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16
share/man/man9/cpu_switchto.9
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@ -1,4 +1,4 @@
.\" $NetBSD: cpu_switchto.9,v 1.6 2007/04/21 17:52:09 yamt Exp $
.\" $NetBSD: cpu_switchto.9,v 1.7 2007/05/21 02:30:47 yamt Exp $
.\"
.\" Copyright (c)2007 YAMAMOTO Takashi,
.\" All rights reserved.
@ -25,7 +25,7 @@
.\" SUCH DAMAGE.
.\"
.\" ------------------------------------------------------------
.Dd April 18, 2007
.Dd May 21, 2007
.Dt CPU_SWITCHTO 9
.Os
.\" ------------------------------------------------------------
@ -84,10 +84,16 @@ It must not be
does not return until another LWP calls
.Fn cpu_switchto
to switch to us.
It returns an lwp from which we have been switched, i.e.,
an LWP which called
It returns the
.Dv oldlwp
argument of the
.Fn cpu_switchto
which is called to switch back to our LWP.
It's either an LWP which called
.Fa cpu_switchto
to switch to us.
to switch to us or
.Dv NULL
in the case that the LWP was exiting.
.\" ------------------------------------------------------------
.Sh SEE ALSO
.Xr swapcontext 3 ,