[tglx-devel:irq/core 2/53] kernel/irq/generic-chip.c:451:16: warning: unused variable 'flags'

[tglx-devel:irq/core 2/53] kernel/irq/generic-chip.c:451:16: warning: unused variable 'flags'

[kernel test robot]

Hi Thomas,

FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git irq/core
head:   369c4f7fd7564a8952129a147cacf88cb4697c79
commit: 6a70c4233a0c6345cca75e6dfa32ae8ebdfab00f [2/53] genirq/generic-chip: Convert core code to lock guards
config: riscv-randconfig-001-20250312 (https://download.01.org/0day-ci/archive/20250312/202503122120.fnHjXarc-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project e15545cad8297ec7555f26e5ae74a9f0511203e7)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250312/202503122120.fnHjXarc-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/202503122120.fnHjXarc-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> kernel/irq/generic-chip.c:451:16: warning: unused variable 'flags' [-Wunused-variable]
     451 |         unsigned long flags;
         |                       ^~~~~
   1 warning generated.


vim +/flags +451 kernel/irq/generic-chip.c

7d8280624797bbe Thomas Gleixner 2011-04-03  439  
ccc414f83914178 Thomas Gleixner 2013-06-28  440  /*
088f40b7b027dad Thomas Gleixner 2013-05-06  441   * irq_map_generic_chip - Map a generic chip for an irq domain
088f40b7b027dad Thomas Gleixner 2013-05-06  442   */
a5152c8a125da3c Boris Brezillon 2014-07-10  443  int irq_map_generic_chip(struct irq_domain *d, unsigned int virq,
088f40b7b027dad Thomas Gleixner 2013-05-06  444  			 irq_hw_number_t hw_irq)
088f40b7b027dad Thomas Gleixner 2013-05-06  445  {
c5863484c16b37a Stefan Agner    2015-05-16  446  	struct irq_data *data = irq_domain_get_irq_data(d, virq);
088f40b7b027dad Thomas Gleixner 2013-05-06  447  	struct irq_domain_chip_generic *dgc = d->gc;
088f40b7b027dad Thomas Gleixner 2013-05-06  448  	struct irq_chip_generic *gc;
088f40b7b027dad Thomas Gleixner 2013-05-06  449  	struct irq_chip_type *ct;
088f40b7b027dad Thomas Gleixner 2013-05-06  450  	struct irq_chip *chip;
088f40b7b027dad Thomas Gleixner 2013-05-06 @451  	unsigned long flags;
088f40b7b027dad Thomas Gleixner 2013-05-06  452  	int idx;
088f40b7b027dad Thomas Gleixner 2013-05-06  453  
f0c450eaa364cb7 Sebastian Frias 2016-08-01  454  	gc = __irq_get_domain_generic_chip(d, hw_irq);
f0c450eaa364cb7 Sebastian Frias 2016-08-01  455  	if (IS_ERR(gc))
f0c450eaa364cb7 Sebastian Frias 2016-08-01  456  		return PTR_ERR(gc);
088f40b7b027dad Thomas Gleixner 2013-05-06  457  
088f40b7b027dad Thomas Gleixner 2013-05-06  458  	idx = hw_irq % dgc->irqs_per_chip;
088f40b7b027dad Thomas Gleixner 2013-05-06  459  
e8bd834f7371437 Grant Likely    2013-05-29  460  	if (test_bit(idx, &gc->unused))
e8bd834f7371437 Grant Likely    2013-05-29  461  		return -ENOTSUPP;
e8bd834f7371437 Grant Likely    2013-05-29  462  
088f40b7b027dad Thomas Gleixner 2013-05-06  463  	if (test_bit(idx, &gc->installed))
088f40b7b027dad Thomas Gleixner 2013-05-06  464  		return -EBUSY;
088f40b7b027dad Thomas Gleixner 2013-05-06  465  
088f40b7b027dad Thomas Gleixner 2013-05-06  466  	ct = gc->chip_types;
088f40b7b027dad Thomas Gleixner 2013-05-06  467  	chip = &ct->chip;
088f40b7b027dad Thomas Gleixner 2013-05-06  468  
088f40b7b027dad Thomas Gleixner 2013-05-06  469  	/* We only init the cache for the first mapping of a generic chip */
088f40b7b027dad Thomas Gleixner 2013-05-06  470  	if (!gc->installed) {
6a70c4233a0c634 Thomas Gleixner 2025-03-11  471  		guard(raw_spinlock_irq)(&gc->lock);
088f40b7b027dad Thomas Gleixner 2013-05-06  472  		irq_gc_init_mask_cache(gc, dgc->gc_flags);
088f40b7b027dad Thomas Gleixner 2013-05-06  473  	}
088f40b7b027dad Thomas Gleixner 2013-05-06  474  
088f40b7b027dad Thomas Gleixner 2013-05-06  475  	/* Mark the interrupt as installed */
088f40b7b027dad Thomas Gleixner 2013-05-06  476  	set_bit(idx, &gc->installed);
088f40b7b027dad Thomas Gleixner 2013-05-06  477  
088f40b7b027dad Thomas Gleixner 2013-05-06  478  	if (dgc->gc_flags & IRQ_GC_INIT_NESTED_LOCK)
39c3fd58952d759 Andrew Lunn     2017-12-02  479  		irq_set_lockdep_class(virq, &irq_nested_lock_class,
39c3fd58952d759 Andrew Lunn     2017-12-02  480  				      &irq_nested_request_class);
088f40b7b027dad Thomas Gleixner 2013-05-06  481  
088f40b7b027dad Thomas Gleixner 2013-05-06  482  	if (chip->irq_calc_mask)
088f40b7b027dad Thomas Gleixner 2013-05-06  483  		chip->irq_calc_mask(data);
088f40b7b027dad Thomas Gleixner 2013-05-06  484  	else
088f40b7b027dad Thomas Gleixner 2013-05-06  485  		data->mask = 1 << idx;
088f40b7b027dad Thomas Gleixner 2013-05-06  486  
c5863484c16b37a Stefan Agner    2015-05-16  487  	irq_domain_set_info(d, virq, hw_irq, chip, gc, ct->handler, NULL, NULL);
088f40b7b027dad Thomas Gleixner 2013-05-06  488  	irq_modify_status(virq, dgc->irq_flags_to_clear, dgc->irq_flags_to_set);
088f40b7b027dad Thomas Gleixner 2013-05-06  489  	return 0;
088f40b7b027dad Thomas Gleixner 2013-05-06  490  }
088f40b7b027dad Thomas Gleixner 2013-05-06  491  

:::::: The code at line 451 was first introduced by commit
:::::: 088f40b7b027dad6519712ff224a5798dd62a204 genirq: Generic chip: Add linear irq domain support

:::::: TO: Thomas Gleixner <tglx@linutronix.de>
:::::: CC: Thomas Gleixner <tglx@linutronix.de>

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