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Commit c9ba78e2 authored by Wu Fengguang's avatar Wu Fengguang Committed by Linus Torvalds
Browse files

pagemap: document clarifications 



Some bit ranges were inclusive and some not.  Fix them to be consistently
inclusive.

Signed-off-by: default avatarWu Fengguang <fengguang.wu@intel.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 17797549

Documentation/vm/pagemap.txt

+3 −3
Original line number Diff line number Diff line
@@ -12,9 +12,9 @@ There are three components to pagemap: 
   value for each virtual page, containing the following data (from

   fs/proc/task_mmu.c, above pagemap_read):



    * Bits 0-55  page frame number (PFN) if present

    * Bits 0-54  page frame number (PFN) if present

    * Bits 0-4   swap type if swapped

    * Bits 5-55  swap offset if swapped

    * Bits 5-54  swap offset if swapped

    * Bits 55-60 page shift (page size = 1<<page shift)

    * Bit  61    reserved for future use

    * Bit  62    page swapped
@@ -36,7 +36,7 @@ There are three components to pagemap: 
 * /proc/kpageflags.  This file contains a 64-bit set of flags for each

   page, indexed by PFN.



   The flags are (from fs/proc/proc_misc, above kpageflags_read):

   The flags are (from fs/proc/page.c, above kpageflags_read):



     0. LOCKED

     1. ERROR