Moving to use local atomic operations to take advantage of the lockless implementation, something that will come handy when the ETB is accessed from the Perf subsystem.
Signed-off-by: Mathieu Poirier <[email protected]> --- drivers/hwtracing/coresight/coresight-etb10.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c index 77d0f9c1118d..ecdbe0dd4d08 100644 --- a/drivers/hwtracing/coresight/coresight-etb10.c +++ b/drivers/hwtracing/coresight/coresight-etb10.c @@ -84,7 +84,7 @@ struct etb_drvdata { struct coresight_device *csdev; struct miscdevice miscdev; spinlock_t spinlock; - atomic_t in_use; + local_t in_use; u8 *buf; u32 buffer_depth; bool enable; @@ -281,7 +281,7 @@ static int etb_open(struct inode *inode, struct file *file) struct etb_drvdata *drvdata = container_of(file->private_data, struct etb_drvdata, miscdev); - if (atomic_cmpxchg(&drvdata->in_use, 0, 1)) + if (local_cmpxchg(&drvdata->in_use, 0, 1)) return -EBUSY; dev_dbg(drvdata->dev, "%s: successfully opened\n", __func__); @@ -317,7 +317,7 @@ static int etb_release(struct inode *inode, struct file *file) { struct etb_drvdata *drvdata = container_of(file->private_data, struct etb_drvdata, miscdev); - atomic_set(&drvdata->in_use, 0); + local_set(&drvdata->in_use, 0); dev_dbg(drvdata->dev, "%s: released\n", __func__); return 0; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
