[tip:timers/urgent 1/1] include/linux/jiffies.h:470:36: sparse: sparse: cast truncates bits from constant value (7fffffffffff0bdc becomes ffff0bdc)

[tip:timers/urgent 1/1] include/linux/jiffies.h:470:36: sparse: sparse: cast truncates bits from constant value (7fffffffffff0bdc becomes ffff0bdc)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/urgent
head:   4096fd0e8eaea13ebe5206700b33f49635ae18e5
commit: b777b5e09eabeefc6ba80f4296366a4742701103 [1/1] time/jiffies: Inline jiffies_to_msecs() and jiffies_to_usecs()
config: alpha-randconfig-r121-20260421 (https://download.01.org/0day-ci/archive/20260422/202604220307.zk9Kn0Gi-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 15.2.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260422/202604220307.zk9Kn0Gi-lkp@intel.com/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
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202604220307.zk9Kn0Gi-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   drivers/firewire/core-card.c: note: in included file (through include/linux/ktime.h, include/linux/timer.h, include/linux/uprobes.h, ...):
>> include/linux/jiffies.h:470:36: sparse: sparse: cast truncates bits from constant value (7fffffffffff0bdc becomes ffff0bdc)
--
   drivers/firewire/core-transaction.c: note: in included file (through include/linux/ktime.h, include/linux/timer.h, include/linux/uprobes.h, ...):
>> include/linux/jiffies.h:470:36: sparse: sparse: cast truncates bits from constant value (7fffffffffff0bdc becomes ffff0bdc)

vim +470 include/linux/jiffies.h

   454	
   455	#if !(USEC_PER_SEC % HZ)
   456	/**
   457	 * jiffies_to_usecs - Convert jiffies to microseconds
   458	 * @j: jiffies value
   459	 *
   460	 * Return: microseconds value
   461	 */
   462	static inline unsigned int jiffies_to_usecs(const unsigned long j)
   463	{
   464		/*
   465		 * Hz usually doesn't go much further MSEC_PER_SEC.
   466		 * jiffies_to_usecs() and usecs_to_jiffies() depend on that.
   467		 */
   468		BUILD_BUG_ON(HZ > USEC_PER_SEC);
   469	
 > 470		return (USEC_PER_SEC / HZ) * j;
   471	}
   472	#else
   473	unsigned int jiffies_to_usecs(const unsigned long j);
   474	#endif
   475	

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