sh: Only reserve memory under CONFIG_ZERO_PAGE_OFFSET when it != 0.

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

1 files changed, 4 insertions, 4 deletions

diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index 534247508572..370d2cfa34eb 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -262,11 +262,11 @@ void __init setup_bootmem_allocator(unsigned long free_pfn)
                         BOOTMEM_DEFAULT);
 
         /*
-         * reserve physical page 0 - it's a special BIOS page on many boxes,
-         * enabling clean reboots, SMP operation, laptop functions.
+         * Reserve physical pages below CONFIG_ZERO_PAGE_OFFSET.
          */
-        reserve_bootmem(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET,
-                        BOOTMEM_DEFAULT);
+        if (CONFIG_ZERO_PAGE_OFFSET != 0)
+                reserve_bootmem(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET,
+                                BOOTMEM_DEFAULT);
 
         sparse_memory_present_with_active_regions(0);