do not forbid other processes to use the pwqr fd.

[~madcoder/pwqr.git] / Documentation / pwqr.adoc

diff --git a/Documentation/pwqr.adoc b/Documentation/pwqr.adoc
index 3915ed4..1942097 100644 (file)
--- a/Documentation/pwqr.adoc
+++ b/Documentation/pwqr.adoc
@@ -257,6 +257,9 @@ If the concurrency level is below the target, then the kernel checks if the
 address `addr` still contains the value `val` (in the fashion of `futex(2)`).
 If it doesn't then the call doesn't block. Else the calling thread is blocked
 until a `PWQR_WAKE` command is received.
 address `addr` still contains the value `val` (in the fashion of `futex(2)`).
 If it doesn't then the call doesn't block. Else the calling thread is blocked
 until a `PWQR_WAKE` command is received.

++
+`addr` must of course be a pointer to an aligned integer which stores the
+reference ticket in userland.

 
 `PWQR_PARK`::
        Puts the thread in park mode. Those are spare threads to avoid
 
 `PWQR_PARK`::
        Puts the thread in park mode. Those are spare threads to avoid