sh: Fix up broken 32-bit initrd support.

Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 9 insertions, 8 deletions

diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index 6d0899e890d0..fc7171a9c804 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -249,17 +249,18 @@ void __init setup_bootmem_allocator(unsigned long free_pfn)
         ROOT_DEV = Root_RAM0;
 
         if (LOADER_TYPE && INITRD_START) {
-                if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
-                        reserve_bootmem(INITRD_START + __MEMORY_START,
-                                        INITRD_SIZE, BOOTMEM_DEFAULT);
-                        initrd_start = INITRD_START + PAGE_OFFSET +
-                                        __MEMORY_START;
+                unsigned long initrd_start_phys = INITRD_START + __MEMORY_START;
+
+                if (initrd_start_phys + INITRD_SIZE <= PFN_PHYS(max_low_pfn)) {
+                        reserve_bootmem(initrd_start_phys, INITRD_SIZE,
+                                        BOOTMEM_DEFAULT);
+                        initrd_start = (unsigned long)__va(initrd_start_phys);
                         initrd_end = initrd_start + INITRD_SIZE;
                 } else {
                         printk("initrd extends beyond end of memory "
-                            "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
-                                    INITRD_START + INITRD_SIZE,
-                                    max_low_pfn << PAGE_SHIFT);
+                               "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+                               initrd_start_phys + INITRD_SIZE,
+                               PFN_PHYS(max_low_pfn));
                         initrd_start = 0;
                 }
         }