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    Subject[PATCH -mm 02/02] Redefine "lock" in Document futex PI design

    Try to explain the term lock better.

    Signed-off-by: Steven Rostedt <>

    Index: linux-2.6.17-rc3-mm1/Documentation/rt-mutex-design.txt
    --- linux-2.6.17-rc3-mm1.orig/Documentation/rt-mutex-design.txt 2006-05-10 09:21:41.000000000 -0400
    +++ linux-2.6.17-rc3-mm1/Documentation/rt-mutex-design.txt 2006-05-10 09:21:55.000000000 -0400
    @@ -84,9 +84,11 @@ mutex - In this document, to differen
    PI and spin locks that are used in the PI code, from now on
    the PI locks will be called a mutex.

    -lock - In this document from now on, the term lock and spin lock will
    - be synonymous. These are locks that are used for SMP as well
    - as turning off preemption to protect areas of code on SMP machines.
    +lock - In this document from now on, I will use the term lock when refering
    + to spin locks that are used to protect parts of the PI algorithm.
    + These locks disable preemption for UP (when CONFIG_PREEMPT is
    + enabled) and on SMP prevents multiple CPUs from entering critical
    + sections simultaneously.

    spin lock - Same as lock above.

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      Last update: 2006-05-10 15:39    [W:0.020 / U:3.964 seconds]
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