korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-09-22 04:31:58 +08:00
Code Issues Packages Projects Releases Wiki Activity

NFSv4/pnfs: Fix barriers in nfs4_mark_deviceid_unavailable()

Browse Source 
Fix the memory barriers in nfs4_mark_deviceid_unavailable() and
nfs4_test_deviceid_unavailable().

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2019-02-26 14:27:58 -05:00
parent 762bb7e973
commit 39a5201a2b
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
fs/nfs/pnfs_dev.c
View File

@ -287,7 +287,9 @@ void
nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node) nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node)
{ {
node->timestamp_unavailable = jiffies; node->timestamp_unavailable = jiffies;
smp_mb__before_atomic();
set_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags); set_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags);
smp_mb__after_atomic();
} }
EXPORT_SYMBOL_GPL(nfs4_mark_deviceid_unavailable); 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)) if (time_in_range(node->timestamp_unavailable, start, end))
return true; return true;
clear_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags); clear_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags);
smp_mb__after_atomic();
} }
return false; return false;
} }