include/linux/jiffies.h:449:36: sparse: sparse: cast truncates bits from constant value (7fffffffffffffff becomes ffffffff)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   06cf61899d6498b33e4b7c87d99d5bd471ccc375
commit: b777b5e09eabeefc6ba80f4296366a4742701103 time/jiffies: Inline jiffies_to_msecs() and jiffies_to_usecs()
date:   6 months ago
config: x86_64-randconfig-r132-20260810 (https://download.01.org/0day-ci/archive/20260810/[email protected]/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260810/[email protected]/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Fixes: b777b5e09eab ("time/jiffies: Inline jiffies_to_msecs() and jiffies_to_usecs()")
| Reported-by: kernel test robot <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

sparse warnings: (new ones prefixed by >>)
   drivers/gpu/drm/i915/gt/intel_engine_cs.c: note: in included file (through include/linux/ktime.h, include/linux/timer.h, include/linux/uprobes.h, include/linux/mm_types.h, ...):
>> include/linux/jiffies.h:449:36: sparse: sparse: cast truncates bits from constant value (7fffffffffffffff becomes ffffffff)
>> include/linux/jiffies.h:449:36: sparse: sparse: cast truncates bits from constant value (7fffffffffffffff becomes ffffffff)
>> include/linux/jiffies.h:449:36: sparse: sparse: cast truncates bits from constant value (7fffffffffffffff becomes ffffffff)
>> include/linux/jiffies.h:449:36: sparse: sparse: cast truncates bits from constant value (7fffffffffffffff becomes ffffffff)

vim +449 include/linux/jiffies.h

   433	
   434	/*
   435	 * Convert various time units to each other:
   436	 */
   437	
   438	#if HZ <= MSEC_PER_SEC && !(MSEC_PER_SEC % HZ)
   439	/**
   440	 * jiffies_to_msecs - Convert jiffies to milliseconds
   441	 * @j: jiffies value
   442	 *
   443	 * This inline version takes care of HZ in {100,250,1000}.
   444	 *
   445	 * Return: milliseconds value
   446	 */
   447	static inline unsigned int jiffies_to_msecs(const unsigned long j)
   448	{
 > 449		return (MSEC_PER_SEC / HZ) * j;
   450	}
   451	#else
   452	unsigned int jiffies_to_msecs(const unsigned long j);
   453	#endif
   454	

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