sound/hda/controllers/intel.c:104:12: warning: 'index' defined but not used
From: kernel test robot
Date: Wed Jun 24 2026 - 16:04:59 EST
Hi Takashi,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: f0e6f20cb52b14c2c441f04e21cef0c95d498cac
commit: 2d9223d2d64cb5216859ced6cc33fb3b04e5f98f ALSA: hda: Move controller drivers into sound/hda/controllers directory
date: 12 months ago
config: loongarch-randconfig-001-20260625 (https://download.01.org/0day-ci/archive/20260625/202606250420.GOprgLwR-lkp@xxxxxxxxx/config)
compiler: loongarch64-linux-gcc (GCC) 12.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260625/202606250420.GOprgLwR-lkp@xxxxxxxxx/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: 2d9223d2d64c ("ALSA: hda: Move controller drivers into sound/hda/controllers directory")
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202606250420.GOprgLwR-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
In file included from include/linux/irqflags.h:19,
from include/linux/spinlock.h:59,
from include/linux/sched.h:2209,
from include/linux/delay.h:13,
from sound/hda/controllers/intel.c:23:
arch/loongarch/include/asm/percpu.h:20:4: error: #error compiler support for the model attribute is necessary when a recent assembler is used
20 | # error compiler support for the model attribute is necessary when a recent assembler is used
| ^~~~~
In file included from include/asm-generic/div64.h:27,
from ./arch/loongarch/include/generated/asm/div64.h:1,
from include/linux/math.h:6,
from include/linux/delay.h:12:
include/linux/compiler.h:197:82: error: expression in static assertion is not an integer
197 | #define __BUILD_BUG_ON_ZERO_MSG(e, msg, ...) ((int)sizeof(struct {_Static_assert(!(e), msg);}))
| ^
include/linux/compiler.h:202:33: note: in expansion of macro '__BUILD_BUG_ON_ZERO_MSG'
202 | #define __must_be_array(a) __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
| ^~~~~~~~~~~~~~~~~~~~~~~
include/linux/array_size.h:11:59: note: in expansion of macro '__must_be_array'
11 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
| ^~~~~~~~~~~~~~~
include/linux/moduleparam.h:521:20: note: in expansion of macro 'ARRAY_SIZE'
521 | = { .max = ARRAY_SIZE(array), .num = nump, \
| ^~~~~~~~~~
include/linux/moduleparam.h:505:9: note: in expansion of macro 'module_param_array_named'
505 | module_param_array_named(name, name, type, nump, perm)
| ^~~~~~~~~~~~~~~~~~~~~~~~
sound/hda/controllers/intel.c:125:1: note: in expansion of macro 'module_param_array'
125 | module_param_array(index, int, NULL, 0444);
| ^~~~~~~~~~~~~~~~~~
>> sound/hda/controllers/intel.c:104:12: warning: 'index' defined but not used [-Wunused-variable]
104 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
| ^~~~~
vim +/index +104 sound/hda/controllers/intel.c
33124929a23c5b sound/pci/hda/hda_intel.c Takashi Iwai 2014-06-26 102
^1da177e4c3f41 sound/pci/hda/hda_intel.c Linus Torvalds 2005-04-16 103
5aba4f8ec72b2b sound/pci/hda/hda_intel.c Takashi Iwai 2008-01-07 @104 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
5aba4f8ec72b2b sound/pci/hda/hda_intel.c Takashi Iwai 2008-01-07 105 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
a67ff6a54095e2 sound/pci/hda/hda_intel.c Rusty Russell 2011-12-15 106 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
5aba4f8ec72b2b sound/pci/hda/hda_intel.c Takashi Iwai 2008-01-07 107 static char *model[SNDRV_CARDS];
1dac6695c683c6 sound/pci/hda/hda_intel.c Takashi Iwai 2012-09-13 108 static int position_fix[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = -1};
5c0d7bc103dd1a sound/pci/hda/hda_intel.c Takashi Iwai 2008-06-10 109 static int bdl_pos_adj[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = -1};
5aba4f8ec72b2b sound/pci/hda/hda_intel.c Takashi Iwai 2008-01-07 110 static int probe_mask[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = -1};
d4d9cd0338892e sound/pci/hda/hda_intel.c Takashi Iwai 2008-12-19 111 static int probe_only[SNDRV_CARDS];
26a6cb6cca225f sound/pci/hda/hda_intel.c David Henningsson 2012-10-09 112 static int jackpoll_ms[SNDRV_CARDS];
41438f1314b0f6 sound/pci/hda/hda_intel.c Takashi Iwai 2017-01-12 113 static int single_cmd = -1;
71623855e20c3f sound/pci/hda/hda_intel.c Takashi Iwai 2009-09-28 114 static int enable_msi = -1;
4ea6fbc8eb23c3 sound/pci/hda/hda_intel.c Takashi Iwai 2009-06-17 115 #ifdef CONFIG_SND_HDA_PATCH_LOADER
4ea6fbc8eb23c3 sound/pci/hda/hda_intel.c Takashi Iwai 2009-06-17 116 static char *patch[SNDRV_CARDS];
4ea6fbc8eb23c3 sound/pci/hda/hda_intel.c Takashi Iwai 2009-06-17 117 #endif
2dca0bba70ce3c sound/pci/hda/hda_intel.c Jaroslav Kysela 2009-11-13 118 #ifdef CONFIG_SND_HDA_INPUT_BEEP
0920c9b4c4d896 sound/pci/hda/hda_intel.c Takashi Iwai 2012-07-03 119 static bool beep_mode[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] =
2dca0bba70ce3c sound/pci/hda/hda_intel.c Jaroslav Kysela 2009-11-13 120 CONFIG_SND_HDA_INPUT_BEEP_MODE};
2dca0bba70ce3c sound/pci/hda/hda_intel.c Jaroslav Kysela 2009-11-13 121 #endif
7fba6aea4472f0 sound/pci/hda/hda_intel.c Takashi Iwai 2020-01-09 122 static bool dmic_detect = 1;
d045bceff5a904 sound/pci/hda/hda_intel.c Jaroslav Kysela 2023-02-02 123 static bool ctl_dev_id = IS_ENABLED(CONFIG_SND_HDA_CTL_DEV_ID) ? 1 : 0;
^1da177e4c3f41 sound/pci/hda/hda_intel.c Linus Torvalds 2005-04-16 124
:::::: The code at line 104 was first introduced by commit
:::::: 5aba4f8ec72b2b880c694b5ce58e67be508f7b7a [ALSA] hda-intel - Support multiple devices
:::::: TO: Takashi Iwai <tiwai@xxxxxxx>
:::::: CC: Jaroslav Kysela <perex@xxxxxxxx>
--
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https://github.com/intel/lkp-tests/wiki