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

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
...@@ -12,9 +12,9 @@ There are three components to pagemap: ...@@ -12,9 +12,9 @@ There are three components to pagemap:
value for each virtual page, containing the following data (from value for each virtual page, containing the following data (from
fs/proc/task_mmu.c, above pagemap_read): 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 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) * Bits 55-60 page shift (page size = 1<<page shift)
* Bit 61 reserved for future use * Bit 61 reserved for future use
* Bit 62 page swapped * Bit 62 page swapped
...@@ -36,7 +36,7 @@ There are three components to pagemap: ...@@ -36,7 +36,7 @@ There are three components to pagemap:
* /proc/kpageflags. This file contains a 64-bit set of flags for each * /proc/kpageflags. This file contains a 64-bit set of flags for each
page, indexed by PFN. 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 0. LOCKED
1. ERROR 1. ERROR
......
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