Re: [PATCH v3 02/19] coccinelle: misc: Add secs_to_jiffies script

Alexander Gordeev
2024-12-17T17:31:06Z

On Tue, Dec 10, 2024 at 10:02:33PM +0000, Easwar Hariharan wrote:

Hi Easwar,

> This script finds and suggests conversions of timeout patterns that
> result in seconds-denominated timeouts to use the new secs_to_jiffies()
> API in include/linux/jiffies.h for better readability.
>
> Suggested-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
> Signed-off-by: Easwar Hariharan <eahariha@linux.microsoft.com>
> ---
> scripts/coccinelle/misc/secs_to_jiffies.cocci | 22 ++++++++++++++++++++++
> 1 file changed, 22 insertions(+)
>
> diff --git a/scripts/coccinelle/misc/secs_to_jiffies.cocci b/scripts/coccinelle/misc/secs_to_jiffies.cocci
> new file mode 100644
> index 0000000000000000000000000000000000000000..8bbb2884ea5db939c63fd4513cf5ca8c977aa8cb
> --- /dev/null
> +++ b/scripts/coccinelle/misc/secs_to_jiffies.cocci
> @@ -0,0 +1,22 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +///
> +/// Find usages of:
> +/// - msecs_to_jiffies(value*1000)
> +/// - msecs_to_jiffies(value*MSEC_PER_SEC)
> +///
> +// Confidence: High
> +// Copyright: (C) 2024 Easwar Hariharan, Microsoft
> +// Keywords: secs, seconds, jiffies
> +//
> +
> +virtual patch
> +
> +@depends on patch@ constant C; @@
> +
> +- msecs_to_jiffies(C * 1000)
> ++ secs_to_jiffies(C)
> +
> +@depends on patch@ constant C; @@
> +
> +- msecs_to_jiffies(C * MSEC_PER_SEC)
> ++ secs_to_jiffies(C)

If you used this script only, then it did not seem to recognize line arch/s390/mm/cmm.c:207

mod_timer(&cmm_timer, jiffies + msecs_to_jiffies(cmm_timeout_seconds * MSEC_PER_SEC));

Thanks!