linux-kernel - [PATCH 3/5] Hibernation: Add mass swap allocation routine.

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Message-ID: <4BFCC94C.2050706@crca.org.au>
Date:	Wed, 26 May 2010 17:10:04 +1000
From:	Nigel Cunningham <ncunningham@...a.org.au>
To:	"Rafael J. Wysocki" <rjw@...k.pl>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	TuxOnIce-devel <tuxonice-devel@...ts.tuxonice.net>
Subject: [PATCH 3/5] Hibernation: Add mass swap allocation routine.

Add a routine to allocate swap from a device en masse. This is only
for use by the in-kernel implementation, not uswsusp.

Signed-off-by: Nigel Cunningham <nigel@...onice.net>
---
  kernel/power/swap.c |   13 +++++++++++++
  1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index e555b6c..550c1ed 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -187,6 +187,19 @@ sector_t alloc_swapdev_block(int swap)
  	return 0;
  }

+int alloc_swapdev_blocks(int needed)
+{
+	int i;
+
+	for (i = 0; i < needed; i++) {
+		sector_t res = alloc_swapdev_block(root_swap);
+		if (!res)
+			break;
+	}
+
+	return i;
+}
+
  /**
   *	free_all_swap_pages - free swap pages allocated for saving image data.
   *	It also frees the extents used to register which swap entres had been
-- 
1.7.0.4

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