From 3c9cafe05ff002eb84d438a02f3c8d468720463b Mon Sep 17 00:00:00 2001
From: Sasha Levin <sasha.levin@oracle.com>
Date: Tue, 21 Oct 2014 16:43:55 -0400
Subject: [PATCH] fs, jbd: use a more generic hash function

While the hash function used by the revoke hashtable is good somewhere else,
it's not really good here.

The default hash shift (8) means that one third of the hashing function
gets lost (and is undefined anyways (8 - 12 = negative shift)):

	"(block << (hash_shift - 12))) & (table->hash_size - 1)"

Instead, just use the kernel's generic hash function that gets used everywhere
else.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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