parisc: Fix kernel memory layout regarding position of __gp

Architecturally we need to keep __gp below 0x1000000.

But because of ftrace and tracepoint support, the RO_DATA_SECTION now gets much
bigger than it was before. By moving the linkage tables before RO_DATA_SECTION
we can avoid that __gp gets positioned at a too high address.

Cc: stable@vger.kernel.org # 4.4+
Signed-off-by: Helge Deller <deller@gmx.de>

arch/parisc/kernel/vmlinux.lds.S

@@ -90,8 +90,9 @@ SECTIONS
 	/* Start of data section */
 	_sdata = .;
 
-	RO_DATA_SECTION(8)
+	/* Architecturally we need to keep __gp below 0x1000000 and thus
-
+	 * in front of RO_DATA_SECTION() which stores lots of tracepoint
+	 * and ftrace symbols. */
 #ifdef CONFIG_64BIT
 	. = ALIGN(16);
 	/* Linkage tables */
@@ -106,6 +107,8 @@ SECTIONS
 	}
 #endif
 
+	RO_DATA_SECTION(8)
+
 	/* unwind info */
 	.PARISC.unwind : {
 		__start___unwind = .;