RAID6_PQ should be disabled by default

[PTDreamer]

RAID6_PQ causes a boot delay of 3.5s on nanopineo. Furthermore even with menuconfig it is not obvious what should be disabled because since there is no help text associated with this configuration there is no easy was of knowing what other configurations depend on it.
Location: │ │ (2) -> Library routines │ │ Defined at lib/Kconfig:10 │ │ Selected by: MD_RAID456 [=m] && MD [=y] && BLK_DEV_MD [=m] || ORE [=n] && (EXOFS_FS [=n] || PNFS_OBJLAYOUT [=n]) || BTRFS_FS [=y] && BLOCK [=y]

[zador-blood-stained]

"Selected by" shows exactly why this symbol was enabled.
And it's a hidden symbol, so it can't be controlled manually - it will be enabled automatically if any other option depends on it.

[zador-blood-stained]

Also: #205

[PTDreamer]

"Selected by" shows exactly why this symbol was enabled.
And it's a hidden symbol, so it can't be controlled manually - it will be enabled automatically if any other option depends on it.

The selected by doesn't show up because there is no help text on the kconfig. The text posted above was after adding some bogus help text.
EDIT: Just to make sure I get the message across, the configuration option "RAID6_PQ" doesn't show up while configuring the kernel because is has no help text associated. This isn't an issue because of the inability to disable it (because as you say it can't be controlled manually) but because it doesn't give you the list of options which depend on it and that indirectly allow you to disable it.

[zador-blood-stained]

The selected by doesn't show up because there is no help text on the kconfig. The text posted above was after adding some bogus help text.

An easy way to find hidden options is using the menuconfig "search" function (/ key).
Example with an unmodified kernel:

Symbol: RAID6_PQ [=y]
Type  : tristate
  Defined at lib/Kconfig:10
  Selected by: MD_RAID456 [=m] && MD [=y] && BLK_DEV_MD [=m] || ORE [=n] && (EXOFS_FS [=n] || PNFS_OBJLAYOUT [=n]) || BTRFS_FS [=y] && BLOCK [=y]

(grepping Kconfig files for the option name is the hard way)

[PTDreamer]

An easy way to find hidden options is using the menuconfig "search" function (/ key).

Full Ack