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ALSA: pcm: use %s instead of %c for format of PCM buffer tracepoints 

As long as I know, in userspace, '%c' format on printing format for
tracepoint is replaced with '>c<' by existent tracing program; i.g.
'perf-trace' and 'trace-cmd'. This is inconvenient.

This commit replaces the format with '%s'. The length of letters in the
format string is not changed, thus this commit doesn't increase object
size.

In theory, I should work for improvements of these tracing programs, but
here I'd like to save my time to work for the other projects.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2017-06-12 09:41:46 +09:00 committed by Takashi Iwai
parent fccf53881e
commit f5abd53222
1 changed files with 6 additions and 6 deletions
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12
sound/core/pcm_trace.h
View File

@ -34,9 +34,9 @@ TRACE_EVENT(hwptr,
__entry->old_hw_ptr = (substream)->runtime->status->hw_ptr;
__entry->hw_ptr_base = (substream)->runtime->hw_ptr_base;
),
TP_printk("pcmC%dD%d%c/sub%d: %s: pos=%lu, old=%lu, base=%lu, period=%lu, buf=%lu",
TP_printk("pcmC%dD%d%s/sub%d: %s: pos=%lu, old=%lu, base=%lu, period=%lu, buf=%lu",
__entry->card, __entry->device,
__entry->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c',
__entry->stream == SNDRV_PCM_STREAM_PLAYBACK ? "p" : "c",
__entry->number,
__entry->in_interrupt ? "IRQ" : "POS",
(unsigned long)__entry->pos,
@ -69,9 +69,9 @@ TRACE_EVENT(xrun,
__entry->old_hw_ptr = (substream)->runtime->status->hw_ptr;
__entry->hw_ptr_base = (substream)->runtime->hw_ptr_base;
),
TP_printk("pcmC%dD%d%c/sub%d: XRUN: old=%lu, base=%lu, period=%lu, buf=%lu",
TP_printk("pcmC%dD%d%s/sub%d: XRUN: old=%lu, base=%lu, period=%lu, buf=%lu",
__entry->card, __entry->device,
__entry->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c',
__entry->stream == SNDRV_PCM_STREAM_PLAYBACK ? "p" : "c",
__entry->number,
(unsigned long)__entry->old_hw_ptr,
(unsigned long)__entry->hw_ptr_base,
@ -96,9 +96,9 @@ TRACE_EVENT(hw_ptr_error,
__entry->stream = (substream)->stream;
__entry->reason = (why);
),
TP_printk("pcmC%dD%d%c/sub%d: ERROR: %s",
TP_printk("pcmC%dD%d%s/sub%d: ERROR: %s",
__entry->card, __entry->device,
__entry->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c',
__entry->stream == SNDRV_PCM_STREAM_PLAYBACK ? "p" : "c",
__entry->number, __entry->reason)
);