Re: [PATCH v3 06/16] accel/thames: Create a context per client on device open

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

:::::: 
:::::: Manual check reason: "linux-review patch is more than 7 days old, verify it wasn't already superseded"
:::::: 

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TO: Tomeu Vizoso <tomeu.vizoso@gmail.com>
TO: Nishanth Menon <nm@ti.com>
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Hi Tomeu,

kernel test robot noticed the following build errors:

[auto build test ERROR on 1ecab8b0bad393750c60cc3819ce9c256595463c]

url:    https://github.com/intel-lab-lkp/linux/commits/Tomeu-Vizoso/dt-bindings-remoteproc-k3-dsp-Add-the-L2-auxiliary-and-DRU-regions/20261023-083926
base:   1ecab8b0bad393750c60cc3819ce9c256595463c
patch link:    https://lore.kernel.org/r/20261023-thames-v3-6-3ab40aa17157%40tomeuvizoso.net
patch subject: [PATCH v3 06/16] accel/thames: Create a context per client on device open
:::::: branch date: 11 days ago
:::::: commit date: 11 days ago
config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20261103/202611031532.mfcuAJrN-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 65303e81f481bbfe386b8596423f94c43198ba94)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261103/202611031532.mfcuAJrN-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/r/202611031532.mfcuAJrN-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/iommu/io-pgtable-arm.c:443:6: error: assigning to 'arm_lpae_iopte' (aka 'unsigned long long') from incompatible type 'void'
     443 |         old = cmpxchg64_relaxed(ptep, curr, new);
         |             ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 error generated.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for IOMMU_IO_PGTABLE_LPAE
   Depends on [n]: IOMMU_SUPPORT [=y] && (ARM || ARM64 || COMPILE_TEST [=y]) && !GENERIC_ATOMIC64 [=y]
   Selected by [m]:
   - DRM_ACCEL_THAMES [=m] && DRM [=m] && DRM_ACCEL [=y] && TI_K3_DSP_REMOTEPROC [=m] && REMOTEPROC [=y] && MAILBOX [=y]


vim +443 drivers/iommu/io-pgtable-arm.c

c896c132b01895 Laurent Pinchart   2014-12-14  423  
fb3a95795da53d Robin Murphy       2017-06-22  424  static arm_lpae_iopte arm_lpae_install_table(arm_lpae_iopte *table,
fb3a95795da53d Robin Murphy       2017-06-22  425  					     arm_lpae_iopte *ptep,
2c3d273eabe8b1 Robin Murphy       2017-06-22  426  					     arm_lpae_iopte curr,
9abe2ac834851a Hector Martin      2021-11-20  427  					     struct arm_lpae_io_pgtable *data)
fb3a95795da53d Robin Murphy       2017-06-22  428  {
2c3d273eabe8b1 Robin Murphy       2017-06-22  429  	arm_lpae_iopte old, new;
9abe2ac834851a Hector Martin      2021-11-20  430  	struct io_pgtable_cfg *cfg = &data->iop.cfg;
e1d3c0fd701df8 Will Deacon        2014-11-14  431  
adb77e757680dc Mostafa Saleh      2026-05-13  432  	new = paddr_to_iopte(virt_to_phys(table), data) | ARM_LPAE_PTE_TYPE_TABLE;
fb3a95795da53d Robin Murphy       2017-06-22  433  	if (cfg->quirks & IO_PGTABLE_QUIRK_ARM_NS)
fb3a95795da53d Robin Murphy       2017-06-22  434  		new |= ARM_LPAE_PTE_NSTABLE;
e1d3c0fd701df8 Will Deacon        2014-11-14  435  
77f3445866c39d Will Deacon        2017-06-23  436  	/*
77f3445866c39d Will Deacon        2017-06-23  437  	 * Ensure the table itself is visible before its PTE can be.
77f3445866c39d Will Deacon        2017-06-23  438  	 * Whilst we could get away with cmpxchg64_release below, this
77f3445866c39d Will Deacon        2017-06-23  439  	 * doesn't have any ordering semantics when !CONFIG_SMP.
77f3445866c39d Will Deacon        2017-06-23  440  	 */
77f3445866c39d Will Deacon        2017-06-23  441  	dma_wmb();
2c3d273eabe8b1 Robin Murphy       2017-06-22  442  
2c3d273eabe8b1 Robin Murphy       2017-06-22 @443  	old = cmpxchg64_relaxed(ptep, curr, new);
2c3d273eabe8b1 Robin Murphy       2017-06-22  444  
4f41845b340783 Will Deacon        2019-06-25  445  	if (cfg->coherent_walk || (old & ARM_LPAE_PTE_SW_SYNC))
2c3d273eabe8b1 Robin Murphy       2017-06-22  446  		return old;
2c3d273eabe8b1 Robin Murphy       2017-06-22  447  
2c3d273eabe8b1 Robin Murphy       2017-06-22  448  	/* Even if it's not ours, there's no point waiting; just kick it */
41e1eb2546e9c8 Isaac J. Manjarres 2021-06-16  449  	__arm_lpae_sync_pte(ptep, 1, cfg);
2c3d273eabe8b1 Robin Murphy       2017-06-22  450  	if (old == curr)
2c3d273eabe8b1 Robin Murphy       2017-06-22  451  		WRITE_ONCE(*ptep, new | ARM_LPAE_PTE_SW_SYNC);
2c3d273eabe8b1 Robin Murphy       2017-06-22  452  
2c3d273eabe8b1 Robin Murphy       2017-06-22  453  	return old;
e1d3c0fd701df8 Will Deacon        2014-11-14  454  }
e1d3c0fd701df8 Will Deacon        2014-11-14  455  

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