[PATCH] Make naming of parititions in sysfs match /proc/partitions.

[PATCH] Make naming of parititions in sysfs match /proc/partitions.

From: Neil Brown <neilb@cse.unsw.edu.au>

In fs/partitions/check.c  there are two pieces of code that add a
partition number to a block-device name:

  - the 'disk_name' function
  - a snprintf in add_partitions.

'disk_name' inserts a 'p' before the partition number if the device
name ends with a digit.  The snprintf in add_partitions doesn't.

This patch rectifies this anomoly so that names in sysfs can be
parsed more reliably.

This has been extensively discussed.  It will probably break the external
`iostat' tool.  But only for disks whose name ends in a digit, which appears
to be only DAC960.