From: kernel test robot <lkp@intel.com>
To: Boqun Feng <boqun@kernel.org>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev
Subject: [boqun:rust-sync 9/12] kernel/softirq.c:638:11: warning: format specifies type 'unsigned int' but the argument has type 'long'
Date: Mon, 04 May 2026 14:27:24 +0800 [thread overview]
Message-ID: <202605041454.txTx1yHk-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/boqun/linux.git rust-sync
head: 25f8ae3956f6e747f0eedaca70ed975a79068ec4
commit: 06213534538c49fcab99613e767100580c940910 [9/12] preempt: x86: Avoid tracking NMI separately when 64BIT=y
config: arm-allnoconfig (https://download.01.org/0day-ci/archive/20260504/202605041454.txTx1yHk-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 5bac06718f502014fade905512f1d26d578a18f3)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260504/202605041454.txTx1yHk-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/202605041454.txTx1yHk-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> kernel/softirq.c:638:11: warning: format specifies type 'unsigned int' but the argument has type 'long' [-Wformat]
636 | pr_err("huh, entered softirq %u %s %p with preempt_count %08x, exited with %08x?\n",
| ~~~~
| %08lx
637 | vec_nr, softirq_to_name[vec_nr], h->action,
638 | prev_count, preempt_count());
| ^~~~~~~~~~
include/linux/printk.h:554:33: note: expanded from macro 'pr_err'
554 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
| ~~~ ^~~~~~~~~~~
include/linux/printk.h:511:60: note: expanded from macro 'printk'
511 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
| ~~~ ^~~~~~~~~~~
include/linux/printk.h:483:19: note: expanded from macro 'printk_index_wrap'
483 | _p_func(_fmt, ##__VA_ARGS__); \
| ~~~~ ^~~~~~~~~~~
1 warning generated.
--
>> arch/arm/kernel/traps.c:518:2: warning: unused variable 'nesting' [-Wunused-variable]
518 | nmi_exit();
| ^~~~~~~~~~
include/linux/hardirq.h:142:3: note: expanded from macro 'nmi_exit'
142 | __nmi_exit(); \
| ^~~~~~~~~~~~
include/linux/hardirq.h:128:16: note: expanded from macro '__nmi_exit'
128 | unsigned int nesting; \
| ^~~~~~~
1 warning generated.
--
>> kernel/time/timer.c:1755:10: warning: format specifies type 'unsigned int' but the argument has type 'long' [-Wformat]
1754 | WARN_ONCE(1, "timer: %pS preempt leak: %08x -> %08x\n",
| ~~~~
| %08lx
1755 | fn, count, preempt_count());
| ^~~~~
include/asm-generic/bug.h:185:38: note: expanded from macro 'WARN_ONCE'
185 | DO_ONCE_LITE_IF(condition, WARN, 1, format)
| ^~~~~~
include/linux/once_lite.h:31:9: note: expanded from macro 'DO_ONCE_LITE_IF'
31 | func(__VA_ARGS__); \
| ^~~~~~~~~~~
include/asm-generic/bug.h:166:29: note: expanded from macro 'WARN'
166 | __WARN_printf(TAINT_WARN, format); \
| ^~~~~~
include/asm-generic/bug.h:142:48: note: expanded from macro '__WARN_printf'
142 | warn_slowpath_fmt(__FILE__, __LINE__, taint, arg); \
| ^~~
1 warning generated.
vim +638 kernel/softirq.c
f1a83e652bedef Peter Zijlstra 2013-11-19 589
1dd1eff161bd55 Zqiang 2024-04-27 590 static void handle_softirqs(bool ksirqd)
^1da177e4c3f41 Linus Torvalds 2005-04-16 591 {
c10d73671ad30f Eric Dumazet 2013-01-10 592 unsigned long end = jiffies + MAX_SOFTIRQ_TIME;
907aed48f65efe Mel Gorman 2012-07-31 593 unsigned long old_flags = current->flags;
34376a50fb1fa0 Ben Greear 2013-06-06 594 int max_restart = MAX_SOFTIRQ_RESTART;
f1a83e652bedef Peter Zijlstra 2013-11-19 595 struct softirq_action *h;
5c4853b60ca8ec Frederic Weisbecker 2013-11-20 596 bool in_hardirq;
f1a83e652bedef Peter Zijlstra 2013-11-19 597 __u32 pending;
2e702b9f6cba4e Joe Perches 2014-01-27 598 int softirq_bit;
907aed48f65efe Mel Gorman 2012-07-31 599
907aed48f65efe Mel Gorman 2012-07-31 600 /*
e45506ac0af9b5 Yangtao Li 2018-10-18 601 * Mask out PF_MEMALLOC as the current task context is borrowed for the
e45506ac0af9b5 Yangtao Li 2018-10-18 602 * softirq. A softirq handled, such as network RX, might set PF_MEMALLOC
e45506ac0af9b5 Yangtao Li 2018-10-18 603 * again if the socket is related to swapping.
907aed48f65efe Mel Gorman 2012-07-31 604 */
907aed48f65efe Mel Gorman 2012-07-31 605 current->flags &= ~PF_MEMALLOC;
^1da177e4c3f41 Linus Torvalds 2005-04-16 606
^1da177e4c3f41 Linus Torvalds 2005-04-16 607 pending = local_softirq_pending();
829035fd709119 Paul Mackerras 2006-07-03 608
f02fc963e91160 Thomas Gleixner 2021-03-09 609 softirq_handle_begin();
5c4853b60ca8ec Frederic Weisbecker 2013-11-20 610 in_hardirq = lockdep_softirq_start();
d3759e7184f8f6 Frederic Weisbecker 2020-12-02 611 account_softirq_enter(current);
^1da177e4c3f41 Linus Torvalds 2005-04-16 612
^1da177e4c3f41 Linus Torvalds 2005-04-16 613 restart:
^1da177e4c3f41 Linus Torvalds 2005-04-16 614 /* Reset the pending bitmask before enabling irqs */
3f74478b5fd726 Andi Kleen 2005-09-12 615 set_softirq_pending(0);
^1da177e4c3f41 Linus Torvalds 2005-04-16 616
c70f5d6610c601 Andrew Morton 2005-07-30 617 local_irq_enable();
^1da177e4c3f41 Linus Torvalds 2005-04-16 618
^1da177e4c3f41 Linus Torvalds 2005-04-16 619 h = softirq_vec;
^1da177e4c3f41 Linus Torvalds 2005-04-16 620
2e702b9f6cba4e Joe Perches 2014-01-27 621 while ((softirq_bit = ffs(pending))) {
2e702b9f6cba4e Joe Perches 2014-01-27 622 unsigned int vec_nr;
06213534538c49 Boqun Feng 2026-05-03 623 long prev_count;
2e702b9f6cba4e Joe Perches 2014-01-27 624
2e702b9f6cba4e Joe Perches 2014-01-27 625 h += softirq_bit - 1;
2e702b9f6cba4e Joe Perches 2014-01-27 626
2e702b9f6cba4e Joe Perches 2014-01-27 627 vec_nr = h - softirq_vec;
2e702b9f6cba4e Joe Perches 2014-01-27 628 prev_count = preempt_count();
8e85b4b553fc93 Thomas Gleixner 2008-10-02 629
f4bc6bb2d56270 Thomas Gleixner 2010-10-19 630 kstat_incr_softirqs_this_cpu(vec_nr);
f4bc6bb2d56270 Thomas Gleixner 2010-10-19 631
f4bc6bb2d56270 Thomas Gleixner 2010-10-19 632 trace_softirq_entry(vec_nr);
e68ac2b488495f Caleb Sander Mateos 2024-08-15 633 h->action();
f4bc6bb2d56270 Thomas Gleixner 2010-10-19 634 trace_softirq_exit(vec_nr);
8e85b4b553fc93 Thomas Gleixner 2008-10-02 635 if (unlikely(prev_count != preempt_count())) {
403227641533c4 Joe Perches 2014-01-27 636 pr_err("huh, entered softirq %u %s %p with preempt_count %08x, exited with %08x?\n",
2e702b9f6cba4e Joe Perches 2014-01-27 637 vec_nr, softirq_to_name[vec_nr], h->action,
f4bc6bb2d56270 Thomas Gleixner 2010-10-19 @638 prev_count, preempt_count());
4a2b4b222743bb Peter Zijlstra 2013-08-14 639 preempt_count_set(prev_count);
8e85b4b553fc93 Thomas Gleixner 2008-10-02 640 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 641 h++;
2e702b9f6cba4e Joe Perches 2014-01-27 642 pending >>= softirq_bit;
2e702b9f6cba4e Joe Perches 2014-01-27 643 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 644
1dd1eff161bd55 Zqiang 2024-04-27 645 if (!IS_ENABLED(CONFIG_PREEMPT_RT) && ksirqd)
d28139c4e96713 Paul E. McKenney 2018-06-28 646 rcu_softirq_qs();
8b1c04acad082d Thomas Gleixner 2021-03-09 647
c70f5d6610c601 Andrew Morton 2005-07-30 648 local_irq_disable();
^1da177e4c3f41 Linus Torvalds 2005-04-16 649
^1da177e4c3f41 Linus Torvalds 2005-04-16 650 pending = local_softirq_pending();
c10d73671ad30f Eric Dumazet 2013-01-10 651 if (pending) {
34376a50fb1fa0 Ben Greear 2013-06-06 652 if (time_before(jiffies, end) && !need_resched() &&
34376a50fb1fa0 Ben Greear 2013-06-06 653 --max_restart)
^1da177e4c3f41 Linus Torvalds 2005-04-16 654 goto restart;
^1da177e4c3f41 Linus Torvalds 2005-04-16 655
^1da177e4c3f41 Linus Torvalds 2005-04-16 656 wakeup_softirqd();
c10d73671ad30f Eric Dumazet 2013-01-10 657 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 658
d3759e7184f8f6 Frederic Weisbecker 2020-12-02 659 account_softirq_exit(current);
5c4853b60ca8ec Frederic Weisbecker 2013-11-20 660 lockdep_softirq_end(in_hardirq);
f02fc963e91160 Thomas Gleixner 2021-03-09 661 softirq_handle_end();
717a94b5fc7092 NeilBrown 2017-04-07 662 current_restore_flags(old_flags, PF_MEMALLOC);
^1da177e4c3f41 Linus Torvalds 2005-04-16 663 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 664
:::::: The code at line 638 was first introduced by commit
:::::: f4bc6bb2d562703eafc895c37e7be20906de139d tracing: Cleanup the convoluted softirq tracepoints
:::::: TO: Thomas Gleixner <tglx@linutronix.de>
:::::: CC: Thomas Gleixner <tglx@linutronix.de>
--
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https://github.com/intel/lkp-tests/wiki
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