tree bb599c0e2ad43ee8f515a9f9af009442931b6a37
parent 3a2842480bbef42c3c90e14c1f378360d8c20a0c
author Jaya Kumar <jayakumar.lkml@gmail.com> 1178609857 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1178648126 -0700

fbdev: mm: Deferred IO support

This implements deferred IO support in fbdev.  Deferred IO is a way to delay
and repurpose IO.  This implementation is done using mm's page_mkwrite and
page_mkclean hooks in order to detect, delay and then rewrite IO.  This
functionality is used by hecubafb.

[adaplas]
This is useful for graphics hardware with no directly addressable/mappable
framebuffer. Implementing this will allow the "framebuffer" to be accesible
from user space via mmap().

Signed-off-by: Jaya Kumar <jayakumar.lkml@gmail.com>
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>