cifsd: enclose macro variables in parenthesis

checkpatch.pl complains as the following:

CHECK: Macro argument 'fp' may be better as '(fp)' to avoid
precedence issues.
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/cifsd/vfs_cache.h

@@ -25,14 +25,14 @@
 #define KSMBD_NO_FID		(UINT_MAX)
 #define SMB2_NO_FID		(0xFFFFFFFFFFFFFFFFULL)
 
-#define FP_FILENAME(fp)		fp->filp->f_path.dentry->d_name.name
-#define FP_INODE(fp)		d_inode(fp->filp->f_path.dentry)
-#define PARENT_INODE(fp)	d_inode(fp->filp->f_path.dentry->d_parent)
-
-#define ATTR_FP(fp) (fp->attrib_only && \
-		(fp->cdoption != FILE_OVERWRITE_IF_LE && \
-		fp->cdoption != FILE_OVERWRITE_LE && \
-		fp->cdoption != FILE_SUPERSEDE_LE))
+#define FP_FILENAME(fp)		((fp)->filp->f_path.dentry->d_name.name)
+#define FP_INODE(fp)		d_inode((fp)->filp->f_path.dentry)
+#define PARENT_INODE(fp)	d_inode((fp)->filp->f_path.dentry->d_parent)
+
+#define ATTR_FP(fp) ((fp)->attrib_only && \
+		     ((fp)->cdoption != FILE_OVERWRITE_IF_LE && \
+		      (fp)->cdoption != FILE_OVERWRITE_LE && \
+		      (fp)->cdoption != FILE_SUPERSEDE_LE))
 
 struct ksmbd_conn;
 struct ksmbd_session;