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Subject[PATCH] spufs support multiple probes markers
* Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca) wrote:
> * Andrew Morton (akpm@linux-foundation.org) wrote:
> >
> > fyi, I have this on hold because I spotted spufs build breakage,
> > but I haven't had time to investigate. powerpc allmodconfig, iirc.
>
> Christoph told me he would update his sputrace accordingly. Christoph,
> should I do the changes or let you do it ?
>
> It's mostly the probe function prototype which changes from
>
> -typedef void marker_probe_func(const struct marker *mdata,
> - void *private_data, const char *fmt, ...);
>
> to
>
> +typedef void marker_probe_func(void *probe_private, void *call_private,
> + const char *fmt, va_list *args);
>
> Where you receive an already ready va_list instead of having to call
> va_start/va_end in the probe.
>
> Also, there is no more marker_arm/marker_disarm. It is now automatically
> done upon register/unregister.
>
> Mathieu
>

Update spufs to the new linux kernel markers API, which supports connecting
more than one probe to a single marker.

(compile-tested only)

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
CC: Christoph Hellwig <hch@infradead.org>
CC: "Frank Ch. Eigler" <fche@redhat.com>
CC: Steven Rostedt <rostedt@goodmis.org>
CC: Andrew Morton <akpm@linux-foundation.org>
---
arch/powerpc/platforms/cell/spufs/sputrace.c | 31 +++++++++------------------
1 file changed, 11 insertions(+), 20 deletions(-)
Index: linux-2.6-lttng/arch/powerpc/platforms/cell/spufs/sputrace.c
===================================================================
--- linux-2.6-lttng.orig/arch/powerpc/platforms/cell/spufs/sputrace.c 2008-02-12 15:07:25.000000000 -0500
+++ linux-2.6-lttng/arch/powerpc/platforms/cell/spufs/sputrace.c 2008-02-12 15:11:39.000000000 -0500
@@ -146,34 +146,28 @@
wake_up(&sputrace_wait);
}

-static void spu_context_event(const struct marker *mdata,
- void *private, const char *format, ...)
+static void spu_context_event(void *probe_private, void *call_data,
+ const char *format, va_list *args)
{
- struct spu_probe *p = mdata->private;
- va_list ap;
+ struct spu_probe *p = probe_private;
struct spu_context *ctx;
struct spu *spu;

- va_start(ap, format);
- ctx = va_arg(ap, struct spu_context *);
- spu = va_arg(ap, struct spu *);
+ ctx = va_arg(*args, struct spu_context *);
+ spu = va_arg(*args, struct spu *);

sputrace_log_item(p->name, ctx, spu);
- va_end(ap);
}

-static void spu_context_nospu_event(const struct marker *mdata,
- void *private, const char *format, ...)
+static void spu_context_nospu_event(void *probe_private, void *call_data,
+ const char *format, va_list *args)
{
- struct spu_probe *p = mdata->private;
- va_list ap;
+ struct spu_probe *p = probe_private;
struct spu_context *ctx;

- va_start(ap, format);
- ctx = va_arg(ap, struct spu_context *);
+ ctx = va_arg(*args, struct spu_context *);

sputrace_log_item(p->name, ctx, NULL);
- va_end(ap);
}

struct spu_probe spu_probes[] = {
@@ -219,10 +213,6 @@
if (error)
printk(KERN_INFO "Unable to register probe %s\n",
p->name);
-
- error = marker_arm(p->name);
- if (error)
- printk(KERN_INFO "Unable to arm probe %s\n", p->name);
}

return 0;
@@ -238,7 +228,8 @@
int i;

for (i = 0; i < ARRAY_SIZE(spu_probes); i++)
- marker_probe_unregister(spu_probes[i].name);
+ marker_probe_unregister(spu_probes[i].name,
+ spu_probes[i].probe_func, &spu_probes[i]);

remove_proc_entry("sputrace", NULL);
kfree(sputrace_log);

--
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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