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| author | Trond Myklebust <trond.myklebust@hammerspace.com> | 2019-02-26 22:27:58 +0300 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2019-03-02 00:20:16 +0300 |
| commit | 39a5201a2b450c2bf0447fb65305654c65f7f954 (patch) | |
| tree | fca8d1037cf87934c2abf5c4185270652cf44bc8 /fs/nfs | |
| parent | 762bb7e97351b37c6267509d5806b4c151250ab1 (diff) | |
| download | linux-39a5201a2b450c2bf0447fb65305654c65f7f954.tar.xz | |
NFSv4/pnfs: Fix barriers in nfs4_mark_deviceid_unavailable()
Fix the memory barriers in nfs4_mark_deviceid_unavailable() and
nfs4_test_deviceid_unavailable().
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/pnfs_dev.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/nfs/pnfs_dev.c b/fs/nfs/pnfs_dev.c index 7fb59487ee90..ec6b607ff1d7 100644 --- a/fs/nfs/pnfs_dev.c +++ b/fs/nfs/pnfs_dev.c @@ -287,7 +287,9 @@ void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node) { node->timestamp_unavailable = jiffies; + smp_mb__before_atomic(); set_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags); + smp_mb__after_atomic(); } EXPORT_SYMBOL_GPL(nfs4_mark_deviceid_unavailable); @@ -302,6 +304,7 @@ nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node) if (time_in_range(node->timestamp_unavailable, start, end)) return true; clear_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags); + smp_mb__after_atomic(); } return false; } |