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>

diff --git a/arch/parisc/kernel/vmlinux.lds.S b/arch/parisc/kernel/vmlinux.lds.S
index b37787d..9a44e92 100644 (file)
--- a/arch/parisc/kernel/vmlinux.lds.S
+++ b/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 = .;