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Commit 8f748aae authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Benjamin Herrenschmidt
Browse files

powerpc/spufs: Initialize ctx->stats.tstamp correctly 



spuctx_switch_state() warns if ktime goes backwards, but it
sometimes compares an uninitialized value, which showed that
the data was unreliable when we actually saw the warning.

Initialize it to the current time in order to get correct data.

Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarJeremy Kerr <jk@ozlabs.org>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 9e1e3723

arch/powerpc/platforms/cell/spufs/context.c

+4 −0
Original line number Diff line number Diff line
@@ -35,6 +35,8 @@ atomic_t nr_spu_contexts = ATOMIC_INIT(0); 
struct spu_context *alloc_spu_context(struct spu_gang *gang)

{

	struct spu_context *ctx;

	struct timespec ts;



	ctx = kzalloc(sizeof *ctx, GFP_KERNEL);

	if (!ctx)

		goto out;
@@ -64,6 +66,8 @@ struct spu_context *alloc_spu_context(struct spu_gang *gang) 
	__spu_update_sched_info(ctx);

	spu_set_timeslice(ctx);

	ctx->stats.util_state = SPU_UTIL_IDLE_LOADED;

	ktime_get_ts(&ts);

	ctx->stats.tstamp = timespec_to_ns(&ts);



	atomic_inc(&nr_spu_contexts);

	goto out;