# git rev-parse -q --verify 2d9cdedc4bdfec9a9d484d3564a1153c3f76ae2d^{commit}
2d9cdedc4bdfec9a9d484d3564a1153c3f76ae2d
already have revision, skipping fetch
# git checkout -q -f -B kisskb 2d9cdedc4bdfec9a9d484d3564a1153c3f76ae2d
# git clean -qxdf
# < git log -1
# commit 2d9cdedc4bdfec9a9d484d3564a1153c3f76ae2d
# Author: Qian Cai <cai@redhat.com>
# Date:   Wed Oct 28 11:27:17 2020 -0400
# 
#     powerpc/eeh_cache: Fix a possible debugfs deadlock
#     
#     Lockdep complains that a possible deadlock below in
#     eeh_addr_cache_show() because it is acquiring a lock with IRQ enabled,
#     but eeh_addr_cache_insert_dev() needs to acquire the same lock with IRQ
#     disabled. Let's just make eeh_addr_cache_show() acquire the lock with
#     IRQ disabled as well.
#     
#             CPU0                    CPU1
#             ----                    ----
#        lock(&pci_io_addr_cache_root.piar_lock);
#                                     local_irq_disable();
#                                     lock(&tp->lock);
#                                     lock(&pci_io_addr_cache_root.piar_lock);
#        <Interrupt>
#          lock(&tp->lock);
#     
#       *** DEADLOCK ***
#     
#       lock_acquire+0x140/0x5f0
#       _raw_spin_lock_irqsave+0x64/0xb0
#       eeh_addr_cache_insert_dev+0x48/0x390
#       eeh_probe_device+0xb8/0x1a0
#       pnv_pcibios_bus_add_device+0x3c/0x80
#       pcibios_bus_add_device+0x118/0x290
#       pci_bus_add_device+0x28/0xe0
#       pci_bus_add_devices+0x54/0xb0
#       pcibios_init+0xc4/0x124
#       do_one_initcall+0xac/0x528
#       kernel_init_freeable+0x35c/0x3fc
#       kernel_init+0x24/0x148
#       ret_from_kernel_thread+0x5c/0x80
#     
#       lock_acquire+0x140/0x5f0
#       _raw_spin_lock+0x4c/0x70
#       eeh_addr_cache_show+0x38/0x110
#       seq_read+0x1a0/0x660
#       vfs_read+0xc8/0x1f0
#       ksys_read+0x74/0x130
#       system_call_exception+0xf8/0x1d0
#       system_call_common+0xe8/0x218
#     
#     Fixes: 5ca85ae6318d ("powerpc/eeh_cache: Add a way to dump the EEH address cache")
#     Signed-off-by: Qian Cai <cai@redhat.com>
#     Reviewed-by: Oliver O'Halloran <oohall@gmail.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20201028152717.8967-1-cai@redhat.com
# < /opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-gcc --version
# < /opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-ld --version
# < git log --format=%s --max-count=1 2d9cdedc4bdfec9a9d484d3564a1153c3f76ae2d
# < make -s -j 120 ARCH=mips O=/kisskb/build/powerpc-fixes_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-  defconfig
# make -s -j 120 ARCH=mips O=/kisskb/build/powerpc-fixes_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-  
FIT description: Linux 5.10.0-rc1-g2d9cdedc4bdf
Created:         Fri Oct 30 00:48:53 2020
 Image 0 (kernel@0)
  Description:  Linux 5.10.0-rc1-g2d9cdedc4bdf
  Created:      Fri Oct 30 00:48:53 2020
  Type:         Kernel Image
  Compression:  gzip compressed
  Data Size:    5173252 Bytes = 5052.00 KiB = 4.93 MiB
  Architecture: MIPS
  OS:           Linux
  Load Address: 0x80100000
  Entry Point:  0x80982d18
  Hash algo:    sha1
  Hash value:   198ff9e6552daf8d83f9cc0d546424125050f574
 Image 1 (fdt@boston)
  Description:  img,boston Device Tree
  Created:      Fri Oct 30 00:48:53 2020
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    3793 Bytes = 3.70 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   4799f50d688573234da6e9d7701234d394759ef4
 Image 2 (fdt@ni169445)
  Description:  NI 169445 device tree
  Created:      Fri Oct 30 00:48:53 2020
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    1871 Bytes = 1.83 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   51b89b31605ee62038c8468c429af091dfc75ec7
 Image 3 (fdt@ocelot_pcb123)
  Description:  MSCC Ocelot PCB123 Device Tree
  Created:      Fri Oct 30 00:48:53 2020
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    4659 Bytes = 4.55 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   5bcb6e4f21e8e5372544aa130b3bd097355a9050
 Image 4 (fdt@ocelot_pcb120)
  Description:  MSCC Ocelot PCB120 Device Tree
  Created:      Fri Oct 30 00:48:53 2020
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    5418 Bytes = 5.29 KiB = 0.01 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   93d882f2009a217e0fa9dab94788535ed2be8476
 Image 5 (fdt@xilfpga)
  Description:  MIPSfpga (xilfpga) Device Tree
  Created:      Fri Oct 30 00:48:53 2020
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    2708 Bytes = 2.64 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   63d058b780f65e22da30f0a183433765f1807f1d
 Default Configuration: 'conf@default'
 Configuration 0 (conf@default)
  Description:  Generic Linux kernel
  Kernel:       kernel@0
 Configuration 1 (conf@boston)
  Description:  Boston Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@boston
 Configuration 2 (conf@ni169445)
  Description:  NI 169445 Linux Kernel
  Kernel:       kernel@0
  FDT:          fdt@ni169445
 Configuration 3 (conf@ocelot_pcb123)
  Description:  Ocelot Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@ocelot_pcb123
 Configuration 4 (conf@ocelot_pcb120)
  Description:  Ocelot Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@ocelot_pcb120
 Configuration 5 (conf@xilfpga)
  Description:  MIPSfpga Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@xilfpga
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_mips-defconfig_mipsel
# Build took: 0:01:07.218170