[PATCH] Btrfs: fix reada debug code compilation

[Vincent]

This fixes the following errors:

  fs/btrfs/reada.c: In function ‘btrfs_reada_wait’:
  fs/btrfs/reada.c:958:42: error: invalid operands to binary < (have ‘atomic_t’ 
and ‘int’)
  fs/btrfs/reada.c:961:41: error: invalid operands to binary < (have ‘atomic_t’ 
and ‘int’)

Signed-off-by: Vincent Stehlé <vincent.ste...@laposte.net>
Cc: Chris Mason <chris.ma...@fusionio.com>
Cc: linux-btrfs@vger.kernel.org
---
 fs/btrfs/reada.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c
index 692185e..d1690c3 100644
--- a/fs/btrfs/reada.c
+++ b/fs/btrfs/reada.c
@@ -955,10 +955,11 @@ int btrfs_reada_wait(void *handle)
        while (atomic_read(&rc->elems)) {
                wait_event_timeout(rc->wait, atomic_read(&rc->elems) == 0,
                                   5 * HZ);
-               dump_devs(rc->root->fs_info, rc->elems < 10 ? 1 : 0);
+               dump_devs(rc->root->fs_info,
+                         atomic_read(&rc->elems) < 10 ? 1 : 0);
        }
 
-       dump_devs(rc->root->fs_info, rc->elems < 10 ? 1 : 0);
+       dump_devs(rc->root->fs_info, atomic_read(&rc->elems) < 10 ? 1 : 0);
 
        kref_put(&rc->refcnt, reada_control_release);
 
-- 
1.7.10.4

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