Re: [PATCH] ide_tape: convert jiffies with jiffies_to_msecs
From: Joe Perches
Date: Tue Mar 03 2015 - 05:37:34 EST
On Tue, 2015-03-03 at 05:23 -0500, Nicholas Mc Guire wrote:
> Use jiffies_to_msecs for converting jiffies as it handles all of the corner
> cases reliably and also helps readability. The printk format is fixed up
> as jiffies_to_msecs returns unsigned int not unsigned long.
Then ideally you'd use %u not %d.
> Note that this patch will give a checkpatch warning due to "quoted string
> split across lines" but thats not related to this change - not sure if this
> should be fixed - looks intentional to me.
It's not. It'd be better coalesced.
> diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
> @@ -1793,11 +1793,11 @@ static void idetape_setup(ide_drive_t *drive, idetape_tape_t *tape, int minor)
> tape->best_dsc_rw_freq = clamp_t(unsigned long, t, IDETAPE_DSC_RW_MIN,
> printk(KERN_INFO "ide-tape: %s <-> %s: %dKBps, %d*%dkB buffer, "
> - "%lums tDSC%s\n",
> + "%dms tDSC%s\n",
> drive->name, tape->name, *(u16 *)&tape->caps,
> (*(u16 *)&tape->caps * 512) / tape->buffer_size,
> tape->buffer_size / 1024,
> - tape->best_dsc_rw_freq * 1000 / HZ,
> + jiffies_to_msecs(tape->best_dsc_rw_freq),
> (drive->dev_flags & IDE_DFLAG_USING_DMA) ? ", DMA" : "");
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