tree eff95b4c8ede07d0777ca68a30d686d1acbb5c73
parent f615bfca468c9b80ed2d09be5fdbaf470a32c045
author Fengguang Wu <wfg@mail.ustc.edu.cn> 1184834879 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1184864684 -0700

readahead: data structure and routines

Extend struct file_ra_state to support the on-demand readahead logic.  Also
define some helpers for it.

Signed-off-by: Fengguang Wu <wfg@mail.ustc.edu.cn>
Cc: Steven Pratt <slpratt@austin.ibm.com>
Cc: Ram Pai <linuxram@us.ibm.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>