jiffies: Cast to unsigned long in secs_to_jiffies() conversion

JIRA: https://issues.redhat.com/browse/RHEL-85955

commit bb2784d
Author: Easwar Hariharan <eahariha@linux.microsoft.com>
Date:   Thu Jan 30 19:26:58 2025 +0000

    jiffies: Cast to unsigned long in secs_to_jiffies() conversion

    While converting users of msecs_to_jiffies(), lkp reported that some range
    checks would always be true because of the mismatch between the implied int
    value of secs_to_jiffies() vs the unsigned long return value of the
    msecs_to_jiffies() calls it was replacing.

    Fix this by casting the secs_to_jiffies() input value to unsigned long.

    Fixes: b35108a ("jiffies: Define secs_to_jiffies()")
    Reported-by: kernel test robot <lkp@intel.com>
    Signed-off-by: Easwar Hariharan <eahariha@linux.microsoft.com>
    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    Cc: stable@vger.kernel.org
    Link: https://lore.kernel.org/all/20250130192701.99626-1-eahariha@linux.microsoft.com
    Closes: https://lore.kernel.org/oe-kbuild-all/202501301334.NB6NszQR-lkp@intel.com/

Signed-off-by: José Expósito <jexposit@redhat.com>

Author: jexposit

include/linux/jiffies.h

@@ -537,7 +537,7 @@ static __always_inline unsigned long msecs_to_jiffies(const unsigned int m)
  *
  * Return: jiffies value
  */
-#define secs_to_jiffies(_secs) ((_secs) * HZ)
+#define secs_to_jiffies(_secs) (unsigned long)((_secs) * HZ)
 
 extern unsigned long __usecs_to_jiffies(const unsigned int u);
 #if !(USEC_PER_SEC % HZ)