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Subjectpartition sysfs OOPS in current GIT
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I get the following OOPS from udevd during bootup on
sparc64:

[ 0.982046] \|/ ____ \|/
[ 0.982054] "@'/ .. \`@"
[ 0.982058] /_| \__/ |_\
[ 0.982063] \__U_/
[ 0.982482] udevd(1305): Kernel illegal instruction [#1]
[ 0.982550] TSTATE: 0000004411001602 TPC: 00000000007ddb80 TNPC: 00000000007ddb84 Y: 00000000 Not tainted
[ 0.982647] TPC: <0x7ddb88>
[ 0.982684] g0: 0000000000000000 g1: 00000000007ddb80 g2: 0000000000000000 g3: 0000000000000000
[ 0.982760] g4: fffff803fb332a00 g5: fffff8000f8a6000 g6: fffff803fb3a8000 g7: fffff803fc893724
[ 0.982831] o0: fffff803fc8bc010 o1: 00000000007ddb58 o2: fffff803fbba0000 o3: fffff803fb3abd48
[ 0.982907] o4: 0000000000040001 o5: 0000000000000000 sp: fffff803fb3ab391 ret_pc: 00000000005b7524
[ 0.982984] RPC: <dev_attr_show+0x24/0x30>
[ 0.983016] l0: 0000000000000000 l1: 0000000000000000 l2: fffff803fc9a5308 l3: 000000000005a000
[ 0.983074] l4: 0000000000000004 l5: fffff803fb340b00 l6: 0000000000000168 l7: fffff803fbd32700
[ 0.983133] i0: fffffffffffffffb i1: 00000000007ddb58 i2: fffff803fbba0000 i3: 0000000000000000
[ 0.983197] i4: 00000000005002a4 i5: 0000000000000008 i6: fffff803fb3ab451 i7: 0000000000500620
[ 0.983269] I7: <sysfs_read_file+0x80/0x104>
[ 0.983299] Caller[0000000000500620]: sysfs_read_file+0x80/0x104
[ 0.983368] Caller[00000000004bedc0]: vfs_read+0x78/0x10c
[ 0.983556] Caller[00000000004bf114]: sys_read+0x34/0x60
[ 0.983622] Caller[0000000000406294]: linux_sparc_syscall32+0x3c/0x40
[ 0.983707] Caller[0000000000016d90]: 0x16d98
[ 0.983873] Instruction DUMP: 007ddb80 00000000 00000000 <00000000> 00000000 00000000 00000000 00000000 007ddb98
This is dev_attr_show() calling attr->show() which points to
'part_attr_group' struct instead of a function. :-)

I'm pretty sure the following changeset is to blame:

commit edfaa7c36574f1bf09c65ad602412db9da5f96bf
Author: Kay Sievers <kay.sievers@vrfy.org>
Date: Mon May 21 22:08:01 2007 +0200

Driver core: convert block from raw kobjects to core devices

This moves the block devices to /sys/class/block. It will create a
flat list of all block devices, with the disks and partitions in one
directory. For compatibility /sys/block is created and contains symlinks
to the disks.

/sys/class/block
|-- sda -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda
|-- sda1 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1
|-- sda10 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda10
|-- sda5 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5
|-- sda6 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda6
|-- sda7 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda7
|-- sda8 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda8
|-- sda9 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda9
`-- sr0 -> ../../devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0
/sys/block/
|-- sda -> ../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda
`-- sr0 -> ../devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>


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