Messages in this thread Patch in this message | | | Date | Tue, 28 Oct 2014 12:59:59 +0100 | From | Takashi Iwai <> | Subject | Re: [PATCH] sound: pci: pcxhr: convert timeval to ktime_t |
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At Tue, 28 Oct 2014 13:29:56 +0200, Aya Mahfouz wrote: > > This patch is concerned with migrating the time variables in the pcxhr > module found in the sound driver. The changes are concerend with the > y2038 problem where timeval will overflow in the year 2038. ktime_t > was used instead of timeval to get the wall time. The difference > is displayed now in nanoseconds instead of microseconds. > > Signed-off-by: Aya Mahfouz <mahfouz.saif.elyazal@gmail.com> > Reviewed-by: Arnd Bergmann <arnd@arndb.de>
It gets compile errors like below. Please submit a patch at least after build testing.
thanks,
Takashi
===
sound/pci/pcxhr/pcxhr_core.c: In function ‘pcxhr_set_pipe_state’: sound/pci/pcxhr/pcxhr_core.c:913:10: error: ‘start’ redeclared as different kind of symbol ktime_t start, stop, diff; ^ sound/pci/pcxhr/pcxhr_core.c:907:27: note: previous definition of ‘start’ was here int capture_mask, int start) ^ In file included from include/linux/printk.h:260:0, from include/linux/kernel.h:13, from include/linux/delay.h:10, from sound/pci/pcxhr/pcxhr_core.c:23: sound/pci/pcxhr/pcxhr_core.c:923:13: error: used union type value where scalar is required start ? "START" : "STOP", audio_mask, state); ^ include/linux/dynamic_debug.h:87:9: note: in definition of macro ‘dynamic_dev_dbg’ ##__VA_ARGS__); \ ^ sound/pci/pcxhr/pcxhr_core.c:921:2: note: in expansion of macro ‘dev_dbg’ dev_dbg(&mgr->pci->dev, ^ sound/pci/pcxhr/pcxhr_core.c:924:6: error: used union type value where scalar is required if (start) { ^ sound/pci/pcxhr/pcxhr_core.c:950:38: error: used union type value where scalar is required if ((state & audio_mask) == (start ? audio_mask : 0)) ^ sound/pci/pcxhr/pcxhr_core.c:958:6: error: wrong type argument to unary exclamation mark if (!start) { ^ scripts/Makefile.build:257: recipe for target 'sound/pci/pcxhr/pcxhr_core.o' failed
> --- > sound/pci/pcxhr/pcxhr.c | 10 ++++++---- > sound/pci/pcxhr/pcxhr_core.c | 10 ++++++---- > 2 files changed, 12 insertions(+), 8 deletions(-) > > diff --git a/sound/pci/pcxhr/pcxhr.c b/sound/pci/pcxhr/pcxhr.c > index b854fc5..3f4607c 100644 > --- a/sound/pci/pcxhr/pcxhr.c > +++ b/sound/pci/pcxhr/pcxhr.c > @@ -711,8 +711,9 @@ static void pcxhr_start_linked_stream(struct pcxhr_mgr *mgr) > int playback_mask = 0; > > #ifdef CONFIG_SND_DEBUG_VERBOSE > - struct timeval my_tv1, my_tv2; > - do_gettimeofday(&my_tv1); > + ktime_t start, stop, diff; > + > + start = ktime_get(); > #endif > mutex_lock(&mgr->setup_mutex); > > @@ -823,9 +824,10 @@ static void pcxhr_start_linked_stream(struct pcxhr_mgr *mgr) > mutex_unlock(&mgr->setup_mutex); > > #ifdef CONFIG_SND_DEBUG_VERBOSE > - do_gettimeofday(&my_tv2); > + stop = ktime_get(); > + diff = ktime_sub(stop, start); > dev_dbg(&mgr->pci->dev, "***TRIGGER START*** TIME = %ld (err = %x)\n", > - (long)(my_tv2.tv_usec - my_tv1.tv_usec), err); > + (long)(ktime_to_ns(diff)), err); > #endif > } > > diff --git a/sound/pci/pcxhr/pcxhr_core.c b/sound/pci/pcxhr/pcxhr_core.c > index a584acb..be3c003 100644 > --- a/sound/pci/pcxhr/pcxhr_core.c > +++ b/sound/pci/pcxhr/pcxhr_core.c > @@ -910,8 +910,9 @@ int pcxhr_set_pipe_state(struct pcxhr_mgr *mgr, int playback_mask, > int audio_mask; > > #ifdef CONFIG_SND_DEBUG_VERBOSE > - struct timeval my_tv1, my_tv2; > - do_gettimeofday(&my_tv1); > + ktime_t start, stop, diff; > + > + start = ktime_get(); > #endif > audio_mask = (playback_mask | > (capture_mask << PCXHR_PIPE_STATE_CAPTURE_OFFSET)); > @@ -960,9 +961,10 @@ int pcxhr_set_pipe_state(struct pcxhr_mgr *mgr, int playback_mask, > return err; > } > #ifdef CONFIG_SND_DEBUG_VERBOSE > - do_gettimeofday(&my_tv2); > + stop = ktime_get(); > + diff = ktime_sub(stop, start); > dev_dbg(&mgr->pci->dev, "***SET PIPE STATE*** TIME = %ld (err = %x)\n", > - (long)(my_tv2.tv_usec - my_tv1.tv_usec), err); > + (long)(ktime_to_ns(diff)), err); > #endif > return 0; > } > -- > 1.9.3 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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