From 0709db6072c2e799eba1aa61bd19e0d7f38aa2cd Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rjw@sisk.pl>
Date: Sun, 6 May 2007 14:50:45 -0700
Subject: swsusp: use GFP_KERNEL for creating basic data structures

Make swsusp call create_basic_memory_bitmaps() before processes are frozen, so
that GFP_KERNEL allocations can be made in it.  Additionally, ensure that the
swsusp's userland interface won't be used while either pm_suspend_disk() or
software_resume() is being executed.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 kernel/power/power.h | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'kernel/power/power.h')

diff --git a/kernel/power/power.h b/kernel/power/power.h
index 1f8052bda0f..a64d3f22de9 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -140,6 +140,9 @@ struct resume_swap_area {
 #define PMOPS_ENTER	2
 #define PMOPS_FINISH	3
 
+/* If unset, the snapshot device cannot be open. */
+extern atomic_t snapshot_device_available;
+
 /**
  *	The bitmap is used for tracing allocated swap pages
  *
-- 
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