[patch -mm] x86_64: fake numa cmdline flag fix

[David Rientjes]

Make sure we only reference 'cmdline' on CONFIG_NUMA_EMU.

Signed-off-by: David Rientjes <[EMAIL PROTECTED]>
---
 arch/x86_64/mm/numa.c |   16 +++++++++++-----
 1 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/arch/x86_64/mm/numa.c b/arch/x86_64/mm/numa.c
--- a/arch/x86_64/mm/numa.c
+++ b/arch/x86_64/mm/numa.c
@@ -524,22 +524,28 @@ void __init numa_initmem_init(unsigned long start_pfn, 
unsigned long end_pfn)
 { 
        unsigned long start_addr = start_pfn << PAGE_SHIFT;
        unsigned long end_addr = end_pfn << PAGE_SHIFT;
+       int numa_fake = 0;
        int i;
 
+#ifdef CONFIG_NUMA_EMU
+       /* Determine if we have a numa=fake command line */
+       if (cmdline != 0)
+               numa_fake = 1;
+#endif
+
 #ifdef CONFIG_ACPI_NUMA
-       if (!numa_off && !cmdline && !acpi_scan_nodes(start_addr, end_addr))
+       if (!numa_off && !numa_fake && !acpi_scan_nodes(start_addr, end_addr))
                return;
 #endif
 
 #ifdef CONFIG_K8_NUMA
-       if (!numa_off && !k8_scan_nodes(start_addr, end_addr, cmdline != 0))
-               if (cmdline == 0)
+       if (!numa_off && !k8_scan_nodes(start_addr, end_addr, numa_fake))
+               if (!numa_fake)
                        return;
 #endif
 
 #ifdef CONFIG_NUMA_EMU
-       if (cmdline)
-       {
+       if (numa_fake) {
                numa_emu = !numa_emulation(start_pfn, end_pfn);
                if (numa_emu)
                        return;
-
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