m68knommu: Add missing initialization of max_pfn and {min,max}_low_pfn

If max_pfn is not initialized, the block layer may use wrong DMA masks.

Replace open-coded shifts by PFN_DOWN(), and drop the "0 on coldfire"
comment, as it is not even true on all Coldfires, let alone all
m68knommu platforms.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Tested-By: Greg Ungerer <gerg@uclinux.org>

diff --git a/arch/m68k/kernel/setup_no.c b/arch/m68k/kernel/setup_no.c
index 88c27d94a7214c959c6d75a3ac992a4c95b13b2e..76b9113f30922df74e8dac0d8dccca9d7c48fd6b 100644 (file)
--- a/arch/m68k/kernel/setup_no.c
+++ b/arch/m68k/kernel/setup_no.c
@@ -238,11 +238,14 @@ void __init setup_arch(char **cmdline_p)
         * Give all the memory to the bootmap allocator, tell it to put the
         * boot mem_map at the start of memory.
         */
+       min_low_pfn = PFN_DOWN(memory_start);
+       max_pfn = max_low_pfn = PFN_DOWN(memory_end);
+
        bootmap_size = init_bootmem_node(
                        NODE_DATA(0),
-                       memory_start >> PAGE_SHIFT, /* map goes here */
-                       PAGE_OFFSET >> PAGE_SHIFT,      /* 0 on coldfire */
-                       memory_end >> PAGE_SHIFT);
+                       min_low_pfn,            /* map goes here */
+                       PFN_DOWN(PAGE_OFFSET),
+                       max_pfn);
        /*
         * Free the usable memory, we have to make sure we do not free
         * the bootmem bitmap so we then reserve it after freeing it :-)