From: kernel test robot <lkp@intel.com>
To: Eric Dumazet <edumazet@google.com>
Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org,
x86@kernel.org, Thomas Gleixner <tglx@kernel.org>
Subject: [tip:timers/urgent 1/1] include/linux/jiffies.h:470:36: sparse: sparse: cast truncates bits from constant value (3fffffffffff85ee becomes ffff85ee)
Date: Mon, 20 Apr 2026 12:06:37 +0800 [thread overview]
Message-ID: <202604201201.swsxm1zW-lkp@intel.com> (raw)
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-r131-20260419 (https://download.01.org/0day-ci/archive/20260420/202604201201.swsxm1zW-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 10.5.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260420/202604201201.swsxm1zW-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/202604201201.swsxm1zW-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c: note: in included file (through include/linux/delay.h):
>> include/linux/jiffies.h:470:36: sparse: sparse: cast truncates bits from constant value (3fffffffffff85ee becomes ffff85ee)
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
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next reply other threads:[~2026-04-20 4:07 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-20 4:06 kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2026-02-12 0:28 [tip:timers/urgent 1/1] include/linux/jiffies.h:470:36: sparse: sparse: cast truncates bits from constant value (3fffffffffff85ee becomes ffff85ee) kernel test robot
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=202604201201.swsxm1zW-lkp@intel.com \
--to=lkp@intel.com \
--cc=edumazet@google.com \
--cc=linux-kernel@vger.kernel.org \
--cc=oe-kbuild-all@lists.linux.dev \
--cc=tglx@kernel.org \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.