Fwd: Excluded List for "#size-cells" warning

[Stan Johnson]

-------- Forwarded Message --------
Subject: Excluded List for "#size-cells" warning
Date: Tue, 28 Oct 2025 10:00:25 -0600
From: Stan Johnson <userm57 at yahoo.com>
To: debian-powerpc at lists.debian.org
CC: Finn Thain <fthain at linux-m68k.org>, Christophe Leroy 
<christophe.leroy at csgroup.eu>

Hello,

On a PowerBook G3 Pismo running the latest Debian SID, dmesg reports the 
warning shown below. I've also seen the warning on PowerBook Lombard and 
Wallstreet systems. I haven't checked PowerBook 3400c or Kanga.

According to drivers/of/base.c:

-----
         for (; np; np = np->parent) {
                 if (!of_property_read_u32(np, "#size-cells", &cells))
                         return cells;
                 /*
                  * Default root value and walking parent nodes for 
"#size-cells"
                  * is deprecated. Any platforms which hit this warning 
should
                  * be added to the excluded list.
                  */
                 WARN_ONCE(!EXCLUDED_DEFAULT_CELLS_PLATFORMS,
                           "Missing '#size-cells' in %pOF\n", np);
         }
         return OF_ROOT_NODE_SIZE_CELLS_DEFAULT;
-----

I'm not sure how to request that systems be "added to the excluded 
list." Hopefully someone who sees this message will know how to proceed; 
I can help with any testing.

thanks

-Stan Johnson

-----

[    0.215282] ------------[ cut here ]------------
[    0.215587] Missing '#size-cells' in /pci at f2000000/mac-io at 17/media-bay at 34
[    0.216349] WARNING: CPU: 0 PID: 1 at drivers/of/base.c:134 
of_bus_n_size_cells+0xc0/0xd4
[    0.216904] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 
6.17.5-pmac #1 NONE  f49e64e4b2bea9e24fad7a6e054c9fb4afe07547
[    0.217582] Hardware name: PowerBook3,1 740/750 0x88300 PowerMac
[    0.217953] NIP:  c048b9d0 LR: c048b9d0 CTR: 00000000
[    0.218268] REGS: e101dae0 TRAP: 0700   Not tainted  (6.17.5-pmac)
[    0.218652] MSR:  00029032 <EE,ME,IR,DR,RI>  CR: 28000422  XER: 00000000
[    0.219124]
                GPR00: c048b9d0 e101dba0 c1060000 0000003d 000000eb 
e101da10 e101da08 00000000
                GPR08: c092d09c 00000000 00000000 e101dba0 48000422 
00000000 c0007a54 00000000
                GPR16: 00000000 00000000 00000000 00000000 00000000 
00000000 0000010a c070c25f
                GPR24: c124f418 00000000 e101dc44 e101dc50 c0630aec 
c0727584 c06d21af dfffcd34
[    0.221406] NIP [c048b9d0] of_bus_n_size_cells+0xc0/0xd4
[    0.221745] LR [c048b9d0] of_bus_n_size_cells+0xc0/0xd4
[    0.222080] Call Trace:
[    0.222241] [e101dba0] [c048b9d0] of_bus_n_size_cells+0xc0/0xd4 
(unreliable)
[    0.222695] [e101dbd0] [c0491844] of_bus_default_count_cells+0x38/0x44
[    0.223116] [e101dbf0] [c049165c] __of_get_address+0xc0/0x178
[    0.223487] [e101dc30] [c0492154] __of_address_to_resource+0x38/0x20c
[    0.223900] [e101dc80] [c03b1334] macio_add_one_device+0x210/0x48c
[    0.224318] [e101dce0] [c03b1718] macio_pci_add_devices+0x168/0x1d8
[    0.224723] [e101dd20] [c03b0c50] macio_pci_probe+0xc4/0xf0
[    0.225088] [e101dd40] [c02fab2c] pci_device_probe+0x88/0xf8
[    0.225457] [e101dd60] [c03973d8] really_probe+0x140/0x298
[    0.225826] [e101dd80] [c0397758] driver_probe_device+0x38/0xa8
[    0.226211] [e101ddb0] [c0397994] __driver_attach+0xfc/0x10c
[    0.226580] [e101ddd0] [c0395544] bus_for_each_dev+0x88/0xc4
[    0.226948] [e101de10] [c0396414] bus_add_driver+0xb4/0x1d0
[    0.227311] [e101de40] [c03981e4] driver_register+0xd4/0x110
[    0.227682] [e101de60] [c0803298] do_one_initcall+0x74/0x1f8
[    0.228064] [e101ded0] [c08036f0] kernel_init_freeable+0x258/0x264
[    0.228465] [e101df10] [c0007a78] kernel_init+0x24/0x12c
[    0.228820] [e101df30] [c00132fc] ret_from_kernel_user_thread+0x10/0x18
[    0.229260] ---- interrupt: 0 at 0x0
[    0.229493] Code: 40a20034 3d20c095 3929eb54 89490001 2c0a0000 
40a20020 3c60c072 39400001 7fe4fb78 386375c1 99490001 4bba10a5 
<0fe00000> 83ff0034 4bffff70 39610030
[    0.230502] ---[ end trace 0000000000000000 ]---