diff --git a/fs/cifs/CHANGES b/fs/cifs/CHANGES
index 851388f..d43e0fe 100644
--- a/fs/cifs/CHANGES
+++ b/fs/cifs/CHANGES
@@ -6,7 +6,9 @@
 are authenticated as guest, as reconnections, invalidating the earlier
 user's smb session.  This fix allows cifs to mount multiple times to the
 same server with different userids without risking invalidating earlier
-established security contexts.
+established security contexts.  fsync now sends SMB Flush operation
+to better ensure that we wait for server to write all of the data to
+server disk (not just write it over the network).
 
 Version 1.56
 ------------
diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index 490e34b..877e4d9 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -340,6 +340,8 @@
 				seq_printf(m, "\nWrites: %d Bytes: %lld",
 					atomic_read(&tcon->num_writes),
 					(long long)(tcon->bytes_written));
+				seq_printf(m, "\nFlushes: %d",
+					atomic_read(&tcon->num_flushes));
 				seq_printf(m, "\nLocks: %d HardLinks: %d "
 					      "Symlinks: %d",
 					atomic_read(&tcon->num_locks),
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index e004f6d..44ff94d 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -254,6 +254,7 @@
 	atomic_t num_smbs_sent;
 	atomic_t num_writes;
 	atomic_t num_reads;
+	atomic_t num_flushes;
 	atomic_t num_oplock_brks;
 	atomic_t num_opens;
 	atomic_t num_closes;
diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index b4e2e9f0..eda6e51 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -43,6 +43,7 @@
 #define SMB_COM_CREATE_DIRECTORY      0x00 /* trivial response */
 #define SMB_COM_DELETE_DIRECTORY      0x01 /* trivial response */
 #define SMB_COM_CLOSE                 0x04 /* triv req/rsp, timestamp ignored */
+#define SMB_COM_FLUSH                 0x05 /* triv req/rsp */
 #define SMB_COM_DELETE                0x06 /* trivial response */
 #define SMB_COM_RENAME                0x07 /* trivial response */
 #define SMB_COM_QUERY_INFORMATION     0x08 /* aka getattr */
@@ -790,6 +791,12 @@
 	__u16 ByteCount;	/* bct = 0 */
 } __attribute__((packed)) CLOSE_RSP;
 
+typedef struct smb_com_flush_req {
+	struct smb_hdr hdr;	/* wct = 1 */
+	__u16 FileID;
+	__u16 ByteCount;	/* 0 */
+} __attribute__((packed)) FLUSH_REQ;
+
 typedef struct smb_com_findclose_req {
 	struct smb_hdr hdr; /* wct = 1 */
 	__u16 FileID;
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index 083dfc5..596fc86 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -281,6 +281,9 @@
 extern int CIFSSMBClose(const int xid, struct cifsTconInfo *tcon,
 			const int smb_file_id);
 
+extern int CIFSSMBFlush(const int xid, struct cifsTconInfo *tcon,
+			const int smb_file_id);
+
 extern int CIFSSMBRead(const int xid, struct cifsTconInfo *tcon,
 			const int netfid, unsigned int count,
 			const __u64 lseek, unsigned int *nbytes, char **buf,
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 939e2f7..4c344fe 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -1934,6 +1934,27 @@
 }
 
 int
+CIFSSMBFlush(const int xid, struct cifsTconInfo *tcon, int smb_file_id)
+{
+	int rc = 0;
+	FLUSH_REQ *pSMB = NULL;
+	cFYI(1, ("In CIFSSMBFlush"));
+
+	rc = small_smb_init(SMB_COM_FLUSH, 1, tcon, (void **) &pSMB);
+	if (rc)
+		return rc;
+
+	pSMB->FileID = (__u16) smb_file_id;
+	pSMB->ByteCount = 0;
+	rc = SendReceiveNoRsp(xid, tcon->ses, (struct smb_hdr *) pSMB, 0);
+	cifs_stats_inc(&tcon->num_flushes);
+	if (rc)
+		cERROR(1, ("Send error in Flush = %d", rc));
+
+	return rc;
+}
+
+int
 CIFSSMBRename(const int xid, struct cifsTconInfo *tcon,
 	      const char *fromName, const char *toName,
 	      const struct nls_table *nls_codepage, int remap)
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 12bb656..83b4741b 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1523,6 +1523,9 @@
 {
 	int xid;
 	int rc = 0;
+	struct cifsTconInfo *tcon;
+	struct cifsFileInfo *smbfile =
+		(struct cifsFileInfo *)file->private_data;
 	struct inode *inode = file->f_path.dentry->d_inode;
 
 	xid = GetXid();
@@ -1534,7 +1537,11 @@
 	if (rc == 0) {
 		rc = CIFS_I(inode)->write_behind_rc;
 		CIFS_I(inode)->write_behind_rc = 0;
+		tcon = CIFS_SB(inode->i_sb)->tcon;
+		if (!rc && tcon && smbfile)
+			rc = CIFSSMBFlush(xid, tcon, smbfile->netfid);
 	}
+
 	FreeXid(xid);
 	return rc;
 }