diff mbox

pc: Avoid registering zero sized memory

Message ID 20100706163700.7542.81367.stgit@localhost.localdomain
State New
Headers show

Commit Message

Alex Williamson July 6, 2010, 4:37 p.m. UTC 
No need to call cpu_register_physical_memory() for a zero sized area.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
---

 hw/pc.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
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Patch

diff --git a/hw/pc.c b/hw/pc.c
index a96187f..58dea57 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -916,8 +916,10 @@  void pc_memory_init(ram_addr_t ram_size,
                  below_4g_mem_size - 0x100000,
                  ram_addr + 0x100000);
 #if TARGET_PHYS_ADDR_BITS > 32
-    cpu_register_physical_memory(0x100000000ULL, above_4g_mem_size,
-                                 ram_addr + below_4g_mem_size);
+    if (above_4g_mem_size > 0) {
+        cpu_register_physical_memory(0x100000000ULL, above_4g_mem_size,
+                                     ram_addr + below_4g_mem_size);
+    }
 #endif
 
     /* BIOS load */