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    SubjectRe: [RFC PATCH 2/3] Generic Trace Setup and Control (GTSC) code
    * Tom Zanussi (zanussi@us.ibm.com) wrote:
    > The Generic Tracing and Control Interface (GTSC) code.
    >
    > Signed-off-by: Tom Zanussi <zanussi@us.ibm.com>
    > Signed-off-by: David Wilder <dwilder@us.ibm.com>
    > ---
    > include/linux/gtsc.h | 104 +++++++++
    > lib/Kconfig | 10
    > lib/Makefile | 2
    > lib/gtsc.c | 558 +++++++++++++++++++++++++++++++++++++++++++++++++++
    > 4 files changed, 674 insertions(+)
    >
    ....
    > +static ssize_t reset_consumed_write(struct file *filp,
    > + const char __user *buffer,
    > + size_t count,
    > + loff_t *ppos)
    > +{
    > + struct trace_info *trace = filp->private_data;
    > +
    > + relay_reset_consumed(trace->rchan);
    > +
    > + return count;
    > +}
    > +
    > +struct file_operations reset_consumed_fops = {
    > + .owner = THIS_MODULE,
    > + .open = reset_consumed_open,
    > + .write = reset_consumed_write
    > +};
    > +

    Quoting the header of relay_reset_consumed:

    + * NOTE: Care should be taken that the channel isn't actually
    + * being used by anything when this call is made.

    I can imagine relay saying "locking is not my problem", while GTSC
    whistle and looks away... ;)


    --
    Mathieu Desnoyers
    Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
    OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
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