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Date: Sun, 21 Nov 2010 00:33:23 +0300
From: Alexander Gordeev <lasaine@....cs.msu.su>
To: Rodolfo Giometti <giometti@...eenne.com>
Cc: linux-kernel@...r.kernel.org,
"Nikita V. Youshchenko" <yoush@...msu.su>,
linuxpps@...enneenne.com,
Andrew Morton <akpm@...ux-foundation.org>,
Tejun Heo <tj@...nel.org>
Subject: Re: [PATCHv4 06/17] pps: convert printk/pr_* to dev_*
В Sat, 20 Nov 2010 16:49:40 +0100
Rodolfo Giometti <giometti@...eenne.com> пишет:
> On Thu, Nov 18, 2010 at 07:00:59PM +0300, Alexander Gordeev wrote:
> > Since we now have direct pointers to struct pps_device everywhere it's
> > easy to use dev_* functions to print messages instead of plain printks.
> > Where dev_* cannot be used printks are converted to pr_*.
> >
> > Signed-off-by: Alexander Gordeev <lasaine@....cs.msu.su>
> > ---
> > drivers/pps/clients/pps-ktimer.c | 5 +++--
> > drivers/pps/clients/pps-ldisc.c | 2 ++
> > drivers/pps/kapi.c | 15 ++++++++-------
> > drivers/pps/pps.c | 25 +++++++++++++------------
> > 4 files changed, 26 insertions(+), 21 deletions(-)
> >
> > diff --git a/drivers/pps/clients/pps-ktimer.c b/drivers/pps/clients/pps-ktimer.c
> > index 966ead1..2728469 100644
> > --- a/drivers/pps/clients/pps-ktimer.c
> > +++ b/drivers/pps/clients/pps-ktimer.c
> > @@ -19,6 +19,7 @@
> > * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
> > */
> >
> > +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
>
> Instead of redefining pr_fmt() in each file you may do it once into
> include file pps_kernel.h...
Yes, but then every .c file will have to include linux/pps_kernel.h
before including linux/kernel.h (where pr_* are defined) and only you
and me will know the reason for that. Of course, we can add a comment to
every .c file to discourage others from moving includes but IMHO the
way how it is done in the patch is better. I dislike hidden
dependencies between header files very much.
> > #include <linux/kernel.h>
> > #include <linux/module.h>
> > @@ -45,7 +46,7 @@ static void pps_ktimer_event(unsigned long ptr)
> > /* First of all we get the time stamp... */
> > pps_get_ts(&ts);
> >
> > - pr_info("PPS event at %lu\n", jiffies);
> > + dev_info(pps->dev, "PPS event at %lu\n", jiffies);
> >
> > pps_event(pps, &ts, PPS_CAPTUREASSERT, NULL);
> >
> > @@ -94,7 +95,7 @@ static int __init pps_ktimer_init(void)
> > pps = pps_register_source(&pps_ktimer_info,
> > PPS_CAPTUREASSERT | PPS_OFFSETASSERT);
> > if (pps == NULL) {
> > - printk(KERN_ERR "cannot register ktimer source\n");
> > + pr_err("cannot register PPS source\n");
> > return -ENOMEM;
> > }
> >
> > diff --git a/drivers/pps/clients/pps-ldisc.c b/drivers/pps/clients/pps-ldisc.c
> > index 1950b15..30789fa 100644
> > --- a/drivers/pps/clients/pps-ldisc.c
> > +++ b/drivers/pps/clients/pps-ldisc.c
> > @@ -19,6 +19,8 @@
> > * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
> > */
> >
> > +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> > +
> > #include <linux/module.h>
> > #include <linux/serial_core.h>
> > #include <linux/tty.h>
> > diff --git a/drivers/pps/kapi.c b/drivers/pps/kapi.c
> > index 98d4012..fbb89c6 100644
> > --- a/drivers/pps/kapi.c
> > +++ b/drivers/pps/kapi.c
> > @@ -19,6 +19,7 @@
> > * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
> > */
> >
> > +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> >
> > #include <linux/kernel.h>
> > #include <linux/module.h>
> > @@ -80,20 +81,20 @@ struct pps_device *pps_register_source(struct pps_source_info *info,
> >
> > /* Sanity checks */
> > if ((info->mode & default_params) != default_params) {
> > - printk(KERN_ERR "pps: %s: unsupported default parameters\n",
> > + pr_err("pps: %s: unsupported default parameters\n",
> > info->name);
> > err = -EINVAL;
> > goto pps_register_source_exit;
> > }
> > if ((info->mode & (PPS_ECHOASSERT | PPS_ECHOCLEAR)) != 0 &&
> > info->echo == NULL) {
> > - printk(KERN_ERR "pps: %s: echo function is not defined\n",
> > + pr_err("pps: %s: echo function is not defined\n",
> > info->name);
> > err = -EINVAL;
> > goto pps_register_source_exit;
> > }
> > if ((info->mode & (PPS_TSFMT_TSPEC | PPS_TSFMT_NTPFP)) == 0) {
> > - printk(KERN_ERR "pps: %s: unspecified time format\n",
> > + pr_err("pps: %s: unspecified time format\n",
> > info->name);
> > err = -EINVAL;
> > goto pps_register_source_exit;
> > @@ -138,7 +139,7 @@ struct pps_device *pps_register_source(struct pps_source_info *info,
> > if (id >= PPS_MAX_SOURCES) {
> > spin_unlock_irq(&pps_idr_lock);
> >
> > - printk(KERN_ERR "pps: %s: too many PPS sources in the system\n",
> > + pr_err("pps: %s: too many PPS sources in the system\n",
> > info->name);
> > err = -EBUSY;
> > goto free_idr;
> > @@ -150,12 +151,12 @@ struct pps_device *pps_register_source(struct pps_source_info *info,
> > /* Create the char device */
> > err = pps_register_cdev(pps);
> > if (err < 0) {
> > - printk(KERN_ERR "pps: %s: unable to create char device\n",
> > + pr_err("%s: unable to create char device\n",
> > info->name);
> > goto free_idr;
> > }
> >
> > - pr_info("new PPS source %s at ID %d\n", info->name, id);
> > + dev_info(pps->dev, "new PPS source %s\n", info->name);
> >
> > return pps;
> >
> > @@ -168,7 +169,7 @@ kfree_pps:
> > kfree(pps);
> >
> > pps_register_source_exit:
> > - printk(KERN_ERR "pps: %s: unable to register source\n", info->name);
> > + pr_err("%s: unable to register source\n", info->name);
> >
> > return NULL;
> > }
> > diff --git a/drivers/pps/pps.c b/drivers/pps/pps.c
> > index 1922f27..9f7c2e8 100644
> > --- a/drivers/pps/pps.c
> > +++ b/drivers/pps/pps.c
> > @@ -19,6 +19,7 @@
> > * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
> > */
> >
> > +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> >
> > #include <linux/kernel.h>
> > #include <linux/module.h>
> > @@ -67,7 +68,7 @@ static long pps_cdev_ioctl(struct file *file,
> >
> > switch (cmd) {
> > case PPS_GETPARAMS:
> > - pr_debug("PPS_GETPARAMS: source %d\n", pps->id);
> > + dev_dbg(pps->dev, "PPS_GETPARAMS\n");
> >
> > spin_lock_irq(&pps->lock);
> >
> > @@ -83,7 +84,7 @@ static long pps_cdev_ioctl(struct file *file,
> > break;
> >
> > case PPS_SETPARAMS:
> > - pr_debug("PPS_SETPARAMS: source %d\n", pps->id);
> > + dev_dbg(pps->dev, "PPS_SETPARAMS\n");
> >
> > /* Check the capabilities */
> > if (!capable(CAP_SYS_TIME))
> > @@ -93,14 +94,14 @@ static long pps_cdev_ioctl(struct file *file,
> > if (err)
> > return -EFAULT;
> > if (!(params.mode & (PPS_CAPTUREASSERT | PPS_CAPTURECLEAR))) {
> > - pr_debug("capture mode unspecified (%x)\n",
> > + dev_dbg(pps->dev, "capture mode unspecified (%x)\n",
> > params.mode);
> > return -EINVAL;
> > }
> >
> > /* Check for supported capabilities */
> > if ((params.mode & ~pps->info.mode) != 0) {
> > - pr_debug("unsupported capabilities (%x)\n",
> > + dev_dbg(pps->dev, "unsupported capabilities (%x)\n",
> > params.mode);
> > return -EINVAL;
> > }
> > @@ -113,7 +114,7 @@ static long pps_cdev_ioctl(struct file *file,
> > /* Restore the read only parameters */
> > if ((params.mode & (PPS_TSFMT_TSPEC | PPS_TSFMT_NTPFP)) == 0) {
> > /* section 3.3 of RFC 2783 interpreted */
> > - pr_debug("time format unspecified (%x)\n",
> > + dev_dbg(pps->dev, "time format unspecified (%x)\n",
> > params.mode);
> > pps->params.mode |= PPS_TSFMT_TSPEC;
> > }
> > @@ -126,7 +127,7 @@ static long pps_cdev_ioctl(struct file *file,
> > break;
> >
> > case PPS_GETCAP:
> > - pr_debug("PPS_GETCAP: source %d\n", pps->id);
> > + dev_dbg(pps->dev, "PPS_GETCAP\n");
> >
> > err = put_user(pps->info.mode, iuarg);
> > if (err)
> > @@ -138,7 +139,7 @@ static long pps_cdev_ioctl(struct file *file,
> > struct pps_fdata fdata;
> > unsigned int ev;
> >
> > - pr_debug("PPS_FETCH: source %d\n", pps->id);
> > + dev_dbg(pps->dev, "PPS_FETCH\n");
> >
> > err = copy_from_user(&fdata, uarg, sizeof(struct pps_fdata));
> > if (err)
> > @@ -153,7 +154,7 @@ static long pps_cdev_ioctl(struct file *file,
> > else {
> > unsigned long ticks;
> >
> > - pr_debug("timeout %lld.%09d\n",
> > + dev_dbg(pps->dev, "timeout %lld.%09d\n",
> > (long long) fdata.timeout.sec,
> > fdata.timeout.nsec);
> > ticks = fdata.timeout.sec * HZ;
> > @@ -171,7 +172,7 @@ static long pps_cdev_ioctl(struct file *file,
> >
> > /* Check for pending signals */
> > if (err == -ERESTARTSYS) {
> > - pr_debug("pending signal caught\n");
> > + dev_dbg(pps->dev, "pending signal caught\n");
> > return -EINTR;
> > }
> >
> > @@ -240,7 +241,7 @@ int pps_register_cdev(struct pps_device *pps)
> >
> > err = cdev_add(&pps->cdev, devt, 1);
> > if (err) {
> > - printk(KERN_ERR "pps: %s: failed to add char device %d:%d\n",
> > + pr_err("%s: failed to add char device %d:%d\n",
> > pps->info.name, MAJOR(pps_devt), pps->id);
> > return err;
> > }
> > @@ -282,14 +283,14 @@ static int __init pps_init(void)
> >
> > pps_class = class_create(THIS_MODULE, "pps");
> > if (!pps_class) {
> > - printk(KERN_ERR "pps: failed to allocate class\n");
> > + pr_err("failed to allocate class\n");
> > return -ENOMEM;
> > }
> > pps_class->dev_attrs = pps_attrs;
> >
> > err = alloc_chrdev_region(&pps_devt, 0, PPS_MAX_SOURCES, "pps");
> > if (err < 0) {
> > - printk(KERN_ERR "pps: failed to allocate char device region\n");
> > + pr_err("failed to allocate char device region\n");
> > goto remove_class;
> > }
> >
> > --
> > 1.7.2.3
> >
>
> Acked-by: Rodolfo Giometti <giometti@...ux.it>
>
--
Alexander
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