[PATCH v2] checkpatch: mention fsleep() in MSLEEP and USLEEP_RANGE warnings

[PATCH v2] checkpatch: mention fsleep() in MSLEEP and USLEEP_RANGE warnings

[Neel Bullywon]

Expand the MSLEEP warning to also reference fsleep() alongside
msleep(), and expand the USLEEP_RANGE check to reference fsleep()
alongside usleep_range() and udelay(). fsleep() autoselects the
best sleep mechanism based on duration, making it a useful
alternative for developers to consider.

Suggested-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Neel Bullywon <neelb2403@gmail.com>
---
Changes in v2:
- Keep existing warning text and expand to mention fsleep() instead
  of replacing the msleep() reference (Andy).
- Also update the USLEEP_RANGE check to mention fsleep() (Andy).

 scripts/checkpatch.pl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index c0250244cf7a..03c070bfa0a4 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -6624,7 +6624,7 @@ sub process {
 			# ignore udelay's < 10, however
 			if (! ($delay < 10) ) {
 				CHK("USLEEP_RANGE",
-				    "usleep_range is preferred over udelay; see function description of usleep_range() and udelay().\n" . $herecurr);
+				    "usleep_range is preferred over udelay; see function description of usleep_range(), udelay(), and fsleep().\n" . $herecurr);
 			}
 			if ($delay > 2000) {
 				WARN("LONG_UDELAY",
@@ -6636,7 +6636,7 @@ sub process {
 		if ($line =~ /\bmsleep\s*\((\d+)\);/) {
 			if ($1 < 20) {
 				WARN("MSLEEP",
-				     "msleep < 20ms can sleep for up to 20ms; see function description of msleep().\n" . $herecurr);
+				     "msleep < 20ms can sleep for up to 20ms; see function description of msleep() and fsleep().\n" . $herecurr);
 			}
 		}
 

base-commit: e7aa57247700733e52a8e2e4dee6a52c2a76de02
-- 
2.44.0

Re: [PATCH v2] checkpatch: mention fsleep() in MSLEEP and USLEEP_RANGE warnings

[Andy Shevchenko]

On Fri, Feb 20, 2026 at 06:05:55PM -0500, Neel Bullywon wrote:
> Expand the MSLEEP warning to also reference fsleep() alongside
> msleep(), and expand the USLEEP_RANGE check to reference fsleep()
> alongside usleep_range() and udelay(). fsleep() autoselects the
> best sleep mechanism based on duration, making it a useful
> alternative for developers to consider.

...

> -				    "usleep_range is preferred over udelay; see function description of usleep_range() and udelay().\n" . $herecurr);
> +				    "usleep_range is preferred over udelay; see function description of usleep_range(), udelay(), and fsleep().\n" . $herecurr);

"fsleep() is preferred over others; usleep_range() is preferred over udelay(); see function descriptions of usleep_range(), udelay(), and fsleep().\n"

...

> -				     "msleep < 20ms can sleep for up to 20ms; see function description of msleep().\n" . $herecurr);
> +				     "msleep < 20ms can sleep for up to 20ms; see function description of msleep() and fsleep().\n" . $herecurr);

"msleep < 20ms can sleep for up to 20ms; consider using fsleep(); see function description of msleep() and fsleep().\n"

-- 
With Best Regards,
Andy Shevchenko