[android-common:android16-6.12 2/2] drivers/iommu/pkvm-pviommu.c:461:12: warning: no previous prototype for '__pviommu_selftest'

[kernel test robot <lkp@intel.com>]

tree:   https://android.googlesource.com/kernel/common android16-6.12
head:   e9bbc29c066a63a4c4dd6e328c43e04f61be700e
commit: e516a71a453c76bb298c8a5f53027c7a943f1132 [2/2] ANDROID: drivers: iommu: pviommu: Add selftest
config: arm64-randconfig-001-20250727 (https://download.01.org/0day-ci/archive/20250727/202507270640.VpQIXidx-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250727/202507270640.VpQIXidx-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/202507270640.VpQIXidx-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/iommu/pkvm-pviommu.c:461:12: warning: no previous prototype for '__pviommu_selftest' [-Wmissing-prototypes]
     461 | int __init __pviommu_selftest(void)
         |            ^~~~~~~~~~~~~~~~~~

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for PHYLINK
   Depends on [n]: NETDEVICES [=n]
   Selected by [y]:
   - GKI_HIDDEN_ETHERNET_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_JACK_INPUT_DEV
   Depends on [n]: SOUND [=n] && SND [=n] && SND_JACK [=y]
   Selected by [y]:
   - GKI_HIDDEN_SND_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for NET_DEVLINK
   Depends on [n]: NET [=n]
   Selected by [y]:
   - GKI_HIDDEN_NET_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for WEXT_PROC
   Depends on [n]: NET [=n] && WIRELESS [=n] && PROC_FS [=y] && WEXT_CORE [=y]
   Selected by [y]:
   - GKI_LEGACY_WEXT_ALLCONFIG [=y]
   WARNING: unmet direct dependencies detected for DIMLIB
   Depends on [n]: NET [=n]
   Selected by [y]:
   - GKI_HIDDEN_VIRTUAL_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_PCM_ELD
   Depends on [n]: SOUND [=n] && SND [=n]
   Selected by [y]:
   - GKI_HIDDEN_SND_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for PAGE_POOL
   Depends on [n]: NET [=n]
   Selected by [y]:
   - GKI_HIDDEN_NET_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for WEXT_PRIV
   Depends on [n]: NET [=n] && WIRELESS [=n]
   Selected by [y]:
   - GKI_LEGACY_WEXT_ALLCONFIG [=y]
   WARNING: unmet direct dependencies detected for NET_PTP_CLASSIFY
   Depends on [n]: NET [=n]
   Selected by [y]:
   - GKI_HIDDEN_NET_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_PCM_IEC958
   Depends on [n]: SOUND [=n] && SND [=n]
   Selected by [y]:
   - GKI_HIDDEN_SND_SOC_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for WIRELESS_EXT
   Depends on [n]: NET [=n] && WIRELESS [=n]
   Selected by [y]:
   - GKI_LEGACY_WEXT_ALLCONFIG [=y]
   WARNING: unmet direct dependencies detected for WEXT_CORE
   Depends on [n]: NET [=n] && WIRELESS [=n] && (CFG80211_WEXT [=n] || WIRELESS_EXT [=y])
   Selected by [y]:
   - GKI_LEGACY_WEXT_ALLCONFIG [=y]
   WARNING: unmet direct dependencies detected for SND_COMPRESS_ACCEL
   Depends on [n]: SOUND [=n] && SND [=n]
   Selected by [y]:
   - GKI_HIDDEN_SND_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_JACK
   Depends on [n]: SOUND [=n] && SND [=n]
   Selected by [y]:
   - GKI_HIDDEN_SND_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_VMASTER
   Depends on [n]: SOUND [=n] && SND [=n]
   Selected by [y]:
   - GKI_HIDDEN_SND_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for CAN_RX_OFFLOAD
   Depends on [n]: NETDEVICES [=n] && CAN_DEV [=n] && CAN_NETLINK [=n]
   Selected by [y]:
   - GKI_HIDDEN_MCP251XFD_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for WEXT_SPY
   Depends on [n]: NET [=n] && WIRELESS [=n]
   Selected by [y]:
   - GKI_LEGACY_WEXT_ALLCONFIG [=y]


vim +/__pviommu_selftest +461 drivers/iommu/pkvm-pviommu.c

   458	
   459	#if IS_ENABLED(CONFIG_PKVM_PVIOMMU_SELFTEST) && !defined(MODULE)
   460	/* Mainly test iova_to_phys and not hypervisor interface. */
 > 461	int __init __pviommu_selftest(void)
   462	{
   463		struct pviommu_domain domain;
   464	
   465		pr_info("pviommu selftest starting\n");
   466	
   467		mt_init(&domain.mappings);
   468	
   469		pviommu_domain_insert_map(&domain, 0x10000, 0xFEFFF, 0xE0000, GFP_KERNEL);
   470		pviommu_domain_insert_map(&domain, 0xFFF0000, 0x1EDBFFFF, 0xDEAD0000, GFP_KERNEL);
   471		ASSERT(pviommu_domain_find(&domain, 0x10000) == 0xE0000);
   472		ASSERT(pviommu_domain_find(&domain, 0x10F00) == 0xE0F00);
   473		ASSERT(pviommu_domain_find(&domain, 0x1EDBFFFF) == 0xED89FFFF);
   474		ASSERT(pviommu_domain_find(&domain, 0x10000000) == 0xDEAE0000);
   475		ASSERT(pviommu_domain_find(&domain, 0x1FF000) == 0);
   476		pviommu_domain_remove_map(&domain, 0x12000, 0x19FFF);
   477		ASSERT(pviommu_domain_find(&domain, 0x11000) == 0xE1000);
   478		ASSERT(pviommu_domain_find(&domain, 0x1B000) == 0xEB000);
   479		ASSERT(pviommu_domain_find(&domain, 0x14000) == 0);
   480	
   481		pviommu_domain_insert_map(&domain, 0xC00000, 0xCFFFFF, 0xABCD000, GFP_KERNEL);
   482		pviommu_domain_insert_map(&domain, 0xD00000, 0xDFFFFF, 0x1000, GFP_KERNEL);
   483		pviommu_domain_insert_map(&domain, 0xE00000, 0xEFFFFF, 0xC0FE00000, GFP_KERNEL);
   484		ASSERT(pviommu_domain_find(&domain, 0xD00000) == 0x1000);
   485		pviommu_domain_remove_map(&domain, 0xC50000, 0xE5FFFF);
   486		ASSERT(pviommu_domain_find(&domain, 0xC50000) == 0);
   487		ASSERT(pviommu_domain_find(&domain, 0xD10000) == 0);
   488		ASSERT(pviommu_domain_find(&domain, 0xE60000) == 0xC0FE60000);
   489		ASSERT(pviommu_domain_find(&domain, 0xC10000) == 0xABDD000);
   490	
   491		mtree_destroy(&domain.mappings);
   492		return 0;
   493	}
   494	

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