Re: [PATCH] sh: intc: sort the prio and sense lists after filling them

[John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>]

Hi Karl,

On Tue, 2026-09-29 at 11:20 +0200, John Paul Adrian Glaubitz wrote:
> Hi Karl,
> 
> On Mon, 2026-09-28 at 23:22 +0200, Karl Mehltretter wrote:
> > On Mon, Sep 28, 2026 at 09:02:55PM +0100, John Paul Adrian Glaubitz wrote:
> > > On Mon, 2026-09-28 at 20:34 +0200, Geert Uytterhoeven wrote:
> > > > > usb reset ; fatload usb 0:1 0x89000000 uImage-git.gz ; pmb ; bootm
> > > > 
> > > > Do you have a config for that kernel?
> > > 
> > > Here are some known configs:
> > > 
> > > https://people.debian.org/~glaubitz/sh7785lcr/configs/
> > 
> > I think it's the config. Your new image loads at 0x8c010000, the working
> > one at 0x80001000.
> > 
> > 0x8c010000 is what an R2D config gives, and config-SH7785LCR-6.5 is one:
> > CPU_SUBTYPE_SH7751R and SH_RTS7751R2D, 29BIT, MEMORY_START 0x0c000000.
> > config-SH7785LCR-2024 still has SH7785LCR, 32BIT/PMB and MEMORY_START
> > 0x40000000, which gives 0x80001000.
> > 
> > I tried both on my QEMU model of the SH7785LCR with 7.3: the 2024 config
> > boots up to the root mount, the 6.5 one prints nothing at all.
> > 
> > So I'd start from config-SH7785LCR-2024 (or sh7785lcr_32bit_defconfig):
> > 
> >   cp config-SH7785LCR-2024 .config make ARCH=sh olddefconfig
> > 
> > and check for "Load Address: 80001000". Keep the intc patch applied, the
> > overflow crashed v6.5 and v6.6 with SLUB on my QEMU model.
> > 
> > With the right config the kernel may then really be too large: 7.3-rc5
> > with config-SH7785LCR-2024 uncompresses to 8.2 MiB, and U-Boot's default
> > CONFIG_SYS_BOOTM_LEN is 8 MiB. U-Boot then prints "Image too large:
> > increase CONFIG_SYS_BOOTM_LEN". With CONFIG_CC_OPTIMIZE_FOR_SIZE=y it is
> > 7.3 MiB and boots through U-Boot on the model.
> 
> Yes, that did the trick! Just need to figure out now why it didn't parse the
> bootargs from u-boot to set the proper root device:
> 
> => usb reset; fatload usb 0:1 0x89000000 uImage-7.3.0.gz ; pmb ; bootm
> (Re)start USB...
> USB0:   scanning bus 0 for devices... 2 USB Device(s) found
>        scanning usb for storage devices... 1 Storage Device(s) found
> reading uImage-7.3.0.gz
> 4319551 bytes read in 2457 ms (1.7 MiB/s)
> ## Booting kernel from Legacy Image at 89000000 ...
>    Image Name:   Linux-7.3.0-rc5-00002-g02d53450e
>    Image Type:   SuperH Linux Kernel Image (gzip compressed)
>    Data Size:    4319487 Bytes = 4.1 MiB
>    Load Address: 80001000
>    Entry Point:  80002000
>    Verifying Checksum ... OK
>    Uncompressing Kernel Image ... OK
> [    0.000000] Linux version 7.3.0-rc5-00002-g02d53450ebff (glaubitz@node54.cloud.suse.de) (sh4-linux-gcc (GCC) 11.1.0, GNU ld (GNU Binutils) 2.36.1) #2 PREEMPT Tue Sep 29 09:12:51 UTC 2026
> [    0.000000] Boot params:
> [    0.000000] ... MOUNT_ROOT_RDONLY - 00000000
> [    0.000000] ... RAMDISK_FLAGS     - 00000000
> [    0.000000] ... ORIG_ROOT_DEV     - 00000000
> [    0.000000] ... LOADER_TYPE       - 00000000
> [    0.000000] ... INITRD_START      - 00000000
> [    0.000000] ... INITRD_SIZE       - 00000000
> [    0.000000] Booting machvec: SH7785LCR
> [    0.000000] PMB: boot mappings:
> [    0.000000]        0x00080000 -> 0x00040000 [  512MB   cached ]
> [    0.000000]        0x000a0000 -> 0x00040000 [   16MB uncached ]
> [    0.000000] Renesas Technology Corp. R0P7785LC0011RL support.
> [    0.000000] Zone ranges:
> [    0.000000]   Normal   [mem 0x0000000040000000-0x000000005fffffff]
> [    0.000000] Movable zone start for each node
> [    0.000000] Early memory node ranges
> [    0.000000]   node   0: [mem 0x0000000040000000-0x000000005fffffff]
> [    0.000000] Initmem setup node 0 [mem 0x0000000040000000-0x000000005fffffff]
> [    0.000000] Kernel command line: console=ttySC1,115200
> [    0.000000] printk: log buffer data + meta data: 65536 + 204800 = 270336 bytes
> [    0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes, linear)
> [    0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes, linear)
> [    0.000000] Sorting __ex_table...
> [    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 131072
> [    0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
> [    0.000000] stackdepot: allocating hash table via alloc_large_system_hash
> [    0.000000] stackdepot hash table entries: 32768 (order: 6, 262144 bytes, linear)
> [    0.000000] stackdepot: allocating space for 8192 stack pools via memblock
> [    0.000000] PVR=10300700 CVR=71440211 PRR=00000250
> [    0.000000] I-cache : n_ways=4 n_sets=256 way_incr=8192
> [    0.000000] I-cache : entry_mask=0x00001fe0 alias_mask=0x00001000 n_aliases=2
> [    0.000000] D-cache : n_ways=4 n_sets=256 way_incr=8192
> [    0.000000] D-cache : entry_mask=0x00001fe0 alias_mask=0x00001000 n_aliases=2
> [    0.000000] virtual kernel memory layout:
> [    0.000000]     fixmap  : 0xdffd7000 - 0xdffff000   ( 160 kB)
> [    0.000000]     vmalloc : 0xc0000000 - 0xdffd5000   ( 511 MB)
> [    0.000000]     lowmem  : 0x80000000 - 0xa0000000   ( 512 MB) (cached)
> [    0.000000]             : 0xa0000000 - 0xa1000000   (  16 MB) (uncached)
> [    0.000000]       .init : 0x8071c000 - 0x80749000   ( 180 kB)
> [    0.000000]       .data : 0x80495280 - 0x8071b5f0   (2584 kB)
> [    0.000000]       .text : 0x80001000 - 0x80495280   (4688 kB)
> [    0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
> [    0.000000] rcu: Preemptible hierarchical RCU implementation.
> [    0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
> [    0.000000] NR_IRQS: 64, nr_irqs: 64, preallocated irqs: 0
> [    0.000000] intc: Registered controller 'sh7785' with 67 IRQs
> [    0.000000] intc: Registered controller 'sh7785-irq4567' with 4 IRQs
> [    0.000000] intc: Registered controller 'sh7785-irq0123' with 4 IRQs
> [    0.000000] rcu: srcu_init: Setting srcu_struct sizes based on contention.
> [    0.000000] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
> [    0.000000] Console: colour dummy device 80x25
> [    0.000000]  sh-tmu.0: ch0: used for clock events
> [    0.000000]  sh-tmu.0: ch0: used for periodic clock events
> [    0.000000]  sh-tmu.0: ch1: used as clock source
> [    0.000000] clocksource: sh-tmu.0: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 152900847964 ns
> [    0.000000]  sh-tmu.1: ch0: used for clock events
> [    0.000000]  sh-tmu.1: ch1: used as clock source
> [    0.000000] clocksource: sh-tmu.1: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 152900847964 ns
> [    0.000000] sched_clock: 32 bits at 250 Hz, resolution 4000000ns, wraps every 8589934590000000ns
> [    0.000000] Calibrating delay loop (skipped)... 599.99 BogoMIPS PRESET (lpj=1199999)
> [    0.000000] CPU: SH7785
> [    0.000000] pid_max: default: 32768 minimum: 301
> [    0.004000] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
> [    0.004000] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
> [    0.012000] VFS: Finished mounting rootfs on nullfs
> [    0.040000] Performance Events: sh4a support registered
> [    0.044000] rcu: Hierarchical SRCU implementation.
> [    0.044000] rcu:     Max phase no-delay instances is 1000.
> [    0.052000] Memory: 508924K/524288K available (4684K kernel code, 452K rwdata, 2128K rodata, 180K init, 2149K bss, 14428K reserved, 0K cma-reserved)
> [    0.056000] devtmpfs: initialized
> [    0.084000] posixtimers hash table entries: 512 (order: 2, 10240 bytes, linear)
> [    0.084000] futex hash table entries: 256 (7168 bytes on 1 NUMA nodes, total 7 KiB, linear).
> [    0.104000] NET: Registered PF_NETLINK/PF_ROUTE protocol family
> [    0.196000] DMA: preallocated 128 KiB GFP_KERNEL pool for atomic allocations
> [    0.196000] audit: initializing netlink subsys (disabled)
> [    0.204000] audit: type=2000 audit(0.200:1): state=initialized audit_enabled=0 res=1
> [    0.212000] cpuidle: using governor ladder
> [    0.212000] cpuidle: using governor menu
> [    0.252000] gpio gpiochip0: Static allocation of GPIO base is deprecated, use dynamic allocation.
> [    0.260000] sh-pfc pfc-sh7785: sh7785_pfc handling gpio 0 -> 110
> [    0.264000] gpio gpiochip1: Static allocation of GPIO base is deprecated, use dynamic allocation.
> [    0.268000] sh-pfc pfc-sh7785: sh7785_pfc handling gpio 111 -> 275
> [    0.268000] sh-pfc pfc-sh7785: sh7785_pfc support registered
> [    0.268000] HW Breakpoints: SH-4A UBC support registered
> [    0.272000] PCI: Starting initialization.
> [    0.524000] PCI: Found a Renesas SH7785 host controller, revision 1.
> [    0.524000] PCI: Checking 66MHz capabilities...
> [    0.524000] PCI: Running at 66MHz.
> [    0.536000] HugeTLB: registered 1.00 MiB page size, pre-allocated 0 pages
> [    0.536000] HugeTLB: 0 KiB vmemmap can be freed for a 1.00 MiB page
> [    0.568000] SCSI subsystem initialized
> [    0.580000] usbcore: registered new interface driver usbfs
> [    0.580000] usbcore: registered new interface driver hub
> [    0.584000] usbcore: registered new device driver usb
> [    0.588000] sh_tmu sh-tmu.0: kept as earlytimer
> [    0.588000] sh_tmu sh-tmu.1: kept as earlytimer
> [    0.612000] DMA: Registering sh_dmac handler (12 channels).
> [    0.640000] DMA: Registering DMA API.
> [    0.644000] PCI host bridge to bus 0000:00
> [    0.644000] pci_bus 0000:00: root bus resource [io  0x1000-0x3fffff]
> [    0.644000] pci_bus 0000:00: root bus resource [mem 0xfd000000-0xfdffffff]
> [    0.644000] pci_bus 0000:00: root bus resource [mem 0x10000000-0x13ffffff]
> [    0.644000] pci_bus 0000:00: root bus resource [mem 0xc0000000-0xdfffffff]
> [    0.644000] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
> [    0.644000] pci 0000:00:00.0: [10ec:8169] type 00 class 0x020000 conventional PCI endpoint
> [    0.644000] pci 0000:00:00.0: BAR 0 [io  0x0000-0x00ff]
> [    0.644000] pci 0000:00:00.0: BAR 1 [mem 0x00000000-0x000000ff]
> [    0.644000] pci 0000:00:00.0: ROM [mem 0x00000000-0x0001ffff pref]
> [    0.644000] pci 0000:00:00.0: supports D1 D2
> [    0.644000] pci 0000:00:00.0: PME# supported from D1 D2 D3hot
> [    0.652000] pci 0000:00:01.0: [1095:3512] type 00 class 0x018000 conventional PCI endpoint
> [    0.652000] pci 0000:00:01.0: BAR 0 [io  0x0000-0x0007]
> [    0.652000] pci 0000:00:01.0: BAR 1 [io  0x0000-0x0003]
> [    0.652000] pci 0000:00:01.0: BAR 2 [io  0x0000-0x0007]
> [    0.652000] pci 0000:00:01.0: BAR 3 [io  0x0000-0x0003]
> [    0.652000] pci 0000:00:01.0: BAR 4 [io  0x0000-0x000f]
> [    0.652000] pci 0000:00:01.0: BAR 5 [mem 0x00000000-0x000001ff]
> [    0.652000] pci 0000:00:01.0: ROM [mem 0x00000000-0x0007ffff pref]
> [    0.652000] pci 0000:00:01.0: supports D1 D2
> [    0.660000] pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 00
> [    0.660000] pci 0000:00:01.0: ROM [mem 0xfd000000-0xfd07ffff pref]: assigned
> [    0.660000] pci 0000:00:00.0: ROM [mem 0xfd080000-0xfd09ffff pref]: assigned
> [    0.660000] pci 0000:00:01.0: BAR 5 [mem 0xfd0a0000-0xfd0a01ff]: assigned
> [    0.660000] pci 0000:00:00.0: BAR 0 [io  0x1000-0x10ff]: assigned
> [    0.660000] pci 0000:00:00.0: BAR 1 [mem 0xfd0a0200-0xfd0a02ff]: assigned
> [    0.660000] pci 0000:00:01.0: BAR 4 [io  0x1400-0x140f]: assigned
> [    0.660000] pci 0000:00:01.0: BAR 0 [io  0x1410-0x1417]: assigned
> [    0.660000] pci 0000:00:01.0: BAR 2 [io  0x1418-0x141f]: assigned
> [    0.660000] pci 0000:00:01.0: BAR 1 [io  0x1420-0x1423]: assigned
> [    0.660000] pci 0000:00:01.0: BAR 3 [io  0x1424-0x1427]: assigned
> [    0.664000] clocksource: Switched to clocksource sh-tmu.0
> [    0.668000] sh_tmu sh-tmu.0: ch0: used for oneshot clock events
> [    0.916000] NET: Registered PF_INET protocol family
> [    0.920000] IP idents hash table entries: 8192 (order: 4, 65536 bytes, linear)
> [    0.928000] tcp_listen_portaddr_hash hash table entries: 256 (order: 1, 5120 bytes, linear)
> [    0.928000] Table-perturb hash table entries: 65536 (order: 6, 262144 bytes, linear)
> [    0.928000] TCP established hash table entries: 4096 (order: 2, 16384 bytes, linear)
> [    0.928000] TCP bind hash table entries: 4096 (order: 6, 163840 bytes, linear)
> [    0.928000] TCP: Hash tables configured (established 4096 bind 4096)
> [    0.932000] UDP hash table entries: 256 (order: 3, 20480 bytes, linear)
> [    0.932000] NET: Registered PF_UNIX/PF_LOCAL protocol family
> [    0.932000] PCI: CLS 0 bytes, default 32
> [    0.936000] sq: Registering store queue API.
> [    0.988000] workingset: timestamp_bits=30 (anon: 25) max_order=17 bucket_order=0 (anon: 0)
> [    1.012000] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 251)
> [    1.012000] io scheduler mq-deadline registered
> [    1.020000] SuperH (H)SCI(F) driver initialized
> [    1.044000] sh-sci.0: ttySC0 MMIO:0xffea0000 (irq = 56, base_baud = 0) is a scif
> [    1.072000] sh-sci.1: ttySC1 MMIO:0xffeb0000 (irq = 60, base_baud = 0) is a scif
> [    1.072000] printk: legacy console [ttySC1] enabled
> [    2.044000] sh-sci.2: ttySC2 MMIO:0xffec0000 (irq = 76, base_baud = 0) is a scif
> [    2.080000] sh-sci.3: ttySC3 MMIO:0xffed0000 (irq = 77, base_baud = 0) is a scif
> [    2.112000] sh-sci.4: ttySC4 MMIO:0xffee0000 (irq = 78, base_baud = 0) is a scif
> [    2.156000] sh-sci.5: ttySC5 MMIO:0xffef0000 (irq = 79, base_baud = 0) is a scif
> [    2.624000] brd: module loaded
> [    2.872000] loop: module loaded
> [    2.876000] sm501 sm501: SM501 At (ptrval): Version 050100c0, 4 Mb, IRQ 26
> [    2.884000] sm501 sm501: setting M1XCLK to 112000000
> [    2.912000] sm501 sm501: setting MCLK to 84000000
> [    2.960000] sata_sil 0000:00:01.0: enabling device (0000 -> 0003)
> [    2.968000] sata_sil 0000:00:01.0: cache line size not set.  Driver may not function
> [    2.976000] sata_sil 0000:00:01.0: Applying R_ERR on DMA activate FIS errata fix
> [    3.040000] scsi host0: sata_sil
> [    3.064000] scsi host1: sata_sil
> [    3.084000] ata1: SATA max UDMA/100 mmio m512@0xfd0a0000 tf 0xfd0a0080 irq 82 lpm-pol 0
> [    3.092000] ata2: SATA max UDMA/100 mmio m512@0xfd0a0000 tf 0xfd0a00c0 irq 82 lpm-pol 0
> [    3.120000] physmap-flash physmap-flash.0: physmap platform flash device: [mem 0x00000000-0x03ffffff]
> [    3.132000] physmap-flash.0: Found 2 x16 devices at 0x0 in 32-bit bank. Manufacturer ID 0x000001 Chip ID 0x002201
> [    3.144000] Amd/Fujitsu Extended Query Table at 0x0040
> [    3.148000]   Amd/Fujitsu Extended Query version 1.3.
> [    3.152000] number of CFI chips: 1
> [    3.164000] Creating 4 MTD partitions on "physmap-flash.0":
> [    3.172000] 0x000000000000-0x000000080000 : "loader"
> [    3.244000] 0x000000080000-0x000000100000 : "bootenv"
> [    3.320000] 0x000000100000-0x000000500000 : "kernel"
> [    3.396000] 0x000000500000-0x000004000000 : "data"
> [    3.412000] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
> [    3.420000] ata1.00: ATA-9: TOSHIBA THNSNJ128GCSU, JURA0101, max UDMA/100
> [    3.436000] ata1.00: 250069680 sectors, multi 16: LBA48 NCQ (depth 0/32)
> [    3.444000] ata1.00: Features: Dev-Sleep HIPM DIPM
> [    3.460000] ata1.00: configured for UDMA/100
> [    3.484000] scsi 0:0:0:0: Direct-Access     ATA      TOSHIBA THNSNJ12 0101 PQ: 0 ANSI: 5
> [    3.620000] sd 0:0:0:0: [sda] 250069680 512-byte logical blocks: (128 GB/119 GiB)
> [    3.656000] sd 0:0:0:0: [sda] Write Protect is off
> [    3.668000] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
> [    3.680000] r8169 0000:00:00.0: enabling device (0000 -> 0003)
> [    3.696000] sd 0:0:0:0: [sda] Preferred minimum I/O size 512 bytes
> [    3.780000]  sda: sda1 sda2 sda3
> [    3.812000] sd 0:0:0:0: [sda] Attached SCSI disk
> [    3.836000] r8169 0000:00:00.0 eth0: RTL8169sc/8110sc, 00:00:87:6b:bd:69, XID 180, IRQ 81
> [    3.844000] r8169 0000:00:00.0 eth0: jumbo features [frames: 7146 bytes, tx checksumming: ok]
> [    3.868000] r8a66597_hcd r8a66597_hcd: USB Host Controller
> [    3.876000] r8a66597_hcd r8a66597_hcd: new USB bus registered, assigned bus number 1
> [    3.884000] r8a66597_hcd r8a66597_hcd: irq 18, io port 0x08000000
> [    3.924000] hub 1-0:1.0: USB hub found
> [    3.932000] hub 1-0:1.0: 2 ports detected
> [    3.960000] ata2: SATA link down (SStatus 0 SControl 310)
> [    3.980000] usbcore: registered new interface driver usb-storage
> [    3.992000] PCA9564/PCA9665 at 0x06000000: PCA9564 detected.
> [    3.996000] PCA9564/PCA9665 at 0x06000000: Choosing the clock frequency based on index is deprecated. Use the nominal frequency.
> [    4.008000] PCA9564/PCA9665 at 0x06000000: Clock frequency is 330kHz
> [    4.016000]  (null): No reset-pin found. Chip may get stuck!
> [    4.028000] i2c-pca-platform i2c-pca-platform: registered.
> [    4.044000] cpufreq: SuperH CPU frequency driver.
> [    4.052000] cpufreq: cpufreq_policy_online: ->get() failed
> [    4.080000] usbcore: registered new interface driver usbhid
> [    4.088000] usbhid: USB HID core driver
> [    4.100000] NET: Registered PF_INET6 protocol family
> [    4.124000] Segment Routing with IPv6
> [    4.128000] In-situ OAM (IOAM) with IPv6
> [    4.132000] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
> [    4.160000] NET: Registered PF_PACKET protocol family
> [    4.168000] Key type dns_resolver registered
> [    4.172000] heartbeat: version 0.1.2 loaded
> [    4.252000] usb 1-1: new high-speed USB device number 2 using r8a66597_hcd
> [    5.164000] kmemleak: Automatic memory scanning thread started
> [    5.172000] kmemleak: Kernel memory leak detector initialized (mem pool available: 15862)
> [    5.188000] /dev/root: Can't lookup blockdev
> [    5.192000] VFS: Cannot open root device "" or unknown-block(0,0): error -19
> [    5.200000] Please append a correct "root=" boot option; here are the available partitions:
> [    5.208000] 0100            4096 ram0 
> [    5.208000]  (driver?)
> [    5.216000] 0101            4096 ram1 
> [    5.216000]  (driver?)
> [    5.220000] 0102            4096 ram2 
> [    5.220000]  (driver?)
> [    5.228000] 0103            4096 ram3 
> [    5.228000]  (driver?)
> [    5.232000] 0104            4096 ram4 
> [    5.232000]  (driver?)
> [    5.240000] 0105            4096 ram5 
> [    5.240000]  (driver?)
> [    5.248000] 0106            4096 ram6 
> [    5.248000]  (driver?)
> [    5.252000] 0107            4096 ram7 
> [    5.252000]  (driver?)
> [    5.260000] 0108            4096 ram8 
> [    5.260000]  (driver?)
> [    5.264000] 0109            4096 ram9 
> [    5.268000]  (driver?)
> [    5.272000] 010a            4096 ram10 
> [    5.272000]  (driver?)
> [    5.280000] 010b            4096 ram11 
> [    5.280000]  (driver?)
> [    5.284000] 010c            4096 ram12 
> [    5.284000]  (driver?)
> [    5.292000] 010d            4096 ram13 
> [    5.292000]  (driver?)
> [    5.300000] 010e            4096 ram14 
> [    5.300000]  (driver?)
> [    5.304000] 010f            4096 ram15 
> [    5.304000]  (driver?)
> [    5.312000] 1f00             512 mtdblock0 
> [    5.312000]  (driver?)
> [    5.320000] 1f01             512 mtdblock1 
> [    5.320000]  (driver?)
> [    5.324000] 1f02            4096 mtdblock2 
> [    5.324000]  (driver?)
> [    5.332000] 1f03           60416 mtdblock3 
> [    5.332000]  (driver?)
> [    5.340000] 0800       125034840 sda 
> [    5.340000]  driver: sd
> [    5.344000]   0801        51200000 sda1 e6077cf7-01
> [    5.344000] 
> [    5.352000]   0802        65011712 sda2 e6077cf7-02
> [    5.352000] 
> [    5.360000]   0803         8822104 sda3 e6077cf7-03
> [    5.360000] 
> [    5.368000] List of all bdev filesystems:
> [    5.372000]  ext3
> [    5.372000]  ext4
> [    5.372000]  ext2
> [    5.376000]  vfat
> [    5.376000]  msdos
> [    5.380000] 
> [    5.384000] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
> [    5.384000] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 7.3.0-rc5-00002-g02d53450ebff #2 PREEMPT 
> [    5.384000] Stack: (0x8108be4c to 0x8108c000)
> [    5.384000] be40:                            8000bd2a 8108be60 80608484 806164e0 00000001 
> [    5.384000] be60: 8000bd64 8108be74 80608484 807495ac 00000000 800026d6 8108be7c 00000005 
> [    5.384000] be80: 80003260 800028cc 8108bea4 80608478 80474760 00000005 80003260 00000005 
> [    5.384000] bea0: 8105a01a 8108beb4 a4cfc1f8 8071d252 8108bec0 8108becc 00000000 00000000 
> [    5.384000] bec0: 00000000 ffffff9c 80608518 6e6b6e75 2d6e776f 636f6c62 2c30286b 80002930 
> [    5.384000] bee0: 807406c4 00000000 00000000 a4cfc1f8 8071d382 8108bf10 000000c0 80749024 
> [    5.384000] bf00: 807406c4 8074902c 00000000 807406c4 8074028c 8108bf44 8071d578 8108bf38 
> [    5.384000] bf20: 000000c0 80749000 807406c4 8074902c 807406b8 80003260 8074026c a4cfc1f8 
> [    5.384000] bf40: 8071cd1e 8108bf60 000000c0 80749000 8074028c 8074026c 810898e0 806b37bc 
> [    5.384000] bf60: 00000007 00000007 00000000 8071c0a0 80746b74 8048c7a8 8108bf94 81098740 
> [    5.384000] bf80: 806be21c 00000000 806b3d7c 806b1164 80003260 80010200 806aded8 806bdbe0 
> [    5.384000] bfa0: 8003f0c4 00000000 00000000 00000000 00000000 00000000 8048c788 00000000 
> [    5.384000] bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
> [    5.384000] bfe0: 00000000 00000000 00000000 40008000 00000000 00000000 00000000 00000000 
> [    5.384000] 
> [    5.384000] Call trace:
> [    5.384000]  [<8000bd2a>] dump_stack_lvl+0x36/0x64
> [    5.384000]  [<8000bd64>] dump_stack+0xc/0x1c
> [    5.384000]  [<800026d6>] vpanic+0xae/0x280
> [    5.384000]  [<80003260>] _printk+0x0/0x50
> [    5.384000]  [<800028cc>] panic+0x24/0x2c
> [    5.384000]  [<80474760>] strlen+0x0/0x58
> [    5.384000]  [<80003260>] _printk+0x0/0x50
> [    5.384000]  [<8071d252>] mount_root_generic+0x12e/0x224
> [    5.384000]  [<80002930>] pr_cont_pool_info+0x5c/0x80
> [    5.384000]  [<8071d382>] mount_root+0x3a/0x168
> [    5.384000]  [<8071d578>] prepare_namespace+0xc8/0x208
> [    5.384000]  [<80003260>] _printk+0x0/0x50
> [    5.384000]  [<8071cd1e>] kernel_init_freeable+0x16e/0x240
> [    5.384000]  [<8071c0a0>] ignore_unknown_bootoption+0x0/0xc
> [    5.384000]  [<8048c7a8>] kernel_init+0x20/0x120
> [    5.384000]  [<80003260>] _printk+0x0/0x50
> [    5.384000]  [<80010200>] ret_from_kernel_thread+0xc/0x14
> [    5.384000]  [<8003f0c4>] schedule_tail+0x0/0x78
> [    5.384000]  [<8048c788>] kernel_init+0x0/0x120
> [    5.384000] 
> [    5.384000] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) ]---

OK, CONFIG_CMDLINE_FROM_BOOTLOADER=y was missing.

root@tirpitz:~> uname -a
Linux tirpitz.buildd.org 7.3.0-rc5-00002-g02d53450ebff #3 PREEMPT Tue Sep 29 09:33:13 UTC 2026 sh4a GNU/Linux
root@tirpitz:~>

Now I can go ahead and test your patch or, better said, check how the kernel
behaves without it as my SH-7785LCR is currently with your patch applied.

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer
`. `'   Physicist
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913