Use f_lock to protect f_flags

[linux-flexiantxendom0-natty.git] / fs / nfsd / vfs.c

diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 6e50aaa..c165a64 100644 (file)
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -998,8 +998,11 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
 
        if (!EX_ISSYNC(exp))
                stable = 0;
-       if (stable && !EX_WGATHER(exp))
+       if (stable && !EX_WGATHER(exp)) {
+               spin_lock(&file->f_lock);
                file->f_flags |= O_SYNC;
+               spin_unlock(&file->f_lock);
+       }
 
        /* Write the data. */
        oldfs = get_fs(); set_fs(KERNEL_DS);