mtd: Disable mtdchar mmap on MMU systems

commit f5cf8f07423b2677cebebcebc863af77223a4972 upstream.

This code was broken because it assumed that all MTD devices were map-based.
Disable it for now, until it can be fixed properly for the next merge window.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3.0.75
board: tuna: fix warnings.

Signed-off-by: Francisco Franco <franciscofranco.1990@gmail.com>
block: cfq: finally nailed CFQ tunables correctly, damn multipliers. Thanks osm0sis for cranking this last bit up.

Signed-off-by: Francisco Franco <franciscofranco.1990@gmail.com>

Conflicts:
	block/cfq-iosched.c
row-iosched.c: Tuning and Optimize
page-writeback.c: subtract min_free_kbytes from dirtyable memory

When calculating amount of dirtyable memory, min_free_kbytes should be
subtracted because it is not intended for dirty pages.

Addresses http://bugs.debian.org/695182

[akpm@linux-foundation.org: fix up min_free_kbytes extern declarations]
[akpm@linux-foundation.org: fix min() warning]
Signed-off-by: Paul Szabo <psz@maths.usyd.edu.au>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
page_alloc.c: min_free_kbytes = 4096