m68k: Fix boot regression on machines with RAM at non-zero

My enhancement to store the initial mapping size for later reuse in commit
486df8bc4627bdfc032d11bedcd056cc5343ee62 ("m68k: Increase initial mapping
to 8 or 16 MiB if possible") broke booting on machines where RAM doesn't
start at address zero.

Use pc-relative addressing to fix this.

Reported-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Andreas Schwab <schwab@linux-m68k.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/m68k/kernel/head.S b/arch/m68k/kernel/head.S
index dbb118e1a4e0..a54788458ca3 100644
--- a/arch/m68k/kernel/head.S
+++ b/arch/m68k/kernel/head.S
@@ -921,7 +921,8 @@ L(nocon):
         jls     1f
         lsrl    #1,%d1
 1:
-        movel   %d1,m68k_init_mapped_size
+        lea     %pc@(m68k_init_mapped_size),%a0
+        movel   %d1,%a0@
         mmu_map #PAGE_OFFSET,%pc@(L(phys_kernel_start)),%d1,\
                 %pc@(m68k_supervisor_cachemode)