x86: fix memory setup bug

interesting...

[    0.000000]   mapped low ram: 0 - 20000000
[    0.000000]   low ram: 00000000 - 1fff0000
[    0.000000]   bootmap 00002000 - 00006000

max_pfn_mapped > max_low_pfn?

it seems init_memory_mapping reveals an old bug.

please check attached test patch.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index 4b953dc93883..392812d3c63c 100644
--- a/arch/x86/kernel/setup_32.c
+++ b/arch/x86/kernel/setup_32.c
@@ -427,7 +427,7 @@ void __init setup_arch(char **cmdline_p)
         find_low_pfn_range();
 
         /* max_pfn_mapped is updated here */
-        init_memory_mapping(0, (max_low_pfn << PAGE_SHIFT));
+        max_pfn_mapped = init_memory_mapping(0, (max_low_pfn << PAGE_SHIFT));
 
         reserve_initrd();