[Suspend2][ 11/32] [Suspend2] Test whether readahead is ready.

[Nigel Cunningham <nigel@suspend2.net>]

Determine whether a particular page's readahead has completed.

Signed-off-by: Nigel Cunningham <nigel@suspend2.net>

 kernel/power/suspend_block_io.c |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/kernel/power/suspend_block_io.c b/kernel/power/suspend_block_io.c
index ae45fc3..f14939e 100644
--- a/kernel/power/suspend_block_io.c
+++ b/kernel/power/suspend_block_io.c
@@ -400,3 +400,17 @@ static void suspend_wait_on_readahead(in
 		do_bio_wait(6);
 }
 
+/*
+ * readahead_done
+ *
+ * Returns whether the readahead requested is ready.
+ */
+
+static int suspend_readahead_ready(int readahead_index)
+{
+	int index = readahead_index / BITS_PER_LONG;
+	int bit = readahead_index - (index * BITS_PER_LONG);
+
+	return test_bit(bit, &suspend_readahead_flags[index]);
+}
+

--
Nigel Cunningham		nigel at suspend2 dot net
-
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