[PATCH] x86: make memtest support 32bit

[Yinghai Lu <yhlu.kernel@gmail.com>]

only support max_low_pfn below...

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>

---
 Documentation/kernel-parameters.txt |    2 +-
 arch/x86/Kconfig                    |    1 -
 arch/x86/mm/init_32.c               |    3 +++
 3 files changed, 4 insertions(+), 2 deletions(-)

Index: linux-2.6/Documentation/kernel-parameters.txt
===================================================================
--- linux-2.6.orig/Documentation/kernel-parameters.txt
+++ linux-2.6/Documentation/kernel-parameters.txt
@@ -1200,7 +1200,7 @@ and is between 256 and 4096 characters.
 			         or
 			         memmap=0x10000$0x18690000
 
-	memtest=	[KNL,X86_64] Enable memtest
+	memtest=	[KNL,X86] Enable memtest
 			Format: <integer>
 			range: 0,4 : pattern number
 			default : 0 <disable>
Index: linux-2.6/arch/x86/mm/init_32.c
===================================================================
--- linux-2.6.orig/arch/x86/mm/init_32.c
+++ linux-2.6/arch/x86/mm/init_32.c
@@ -844,6 +844,9 @@ unsigned long __init_refok init_memory_m
 		reserve_early(table_start << PAGE_SHIFT,
 				 table_end << PAGE_SHIFT, "PGTABLE");
 
+	if (!after_init_bootmem)
+		early_memtest(start, end);
+
 	return end >> PAGE_SHIFT;
 }
 
Index: linux-2.6/arch/x86/Kconfig
===================================================================
--- linux-2.6.orig/arch/x86/Kconfig
+++ linux-2.6/arch/x86/Kconfig
@@ -448,7 +448,6 @@ config PARAVIRT_DEBUG
 
 config MEMTEST
 	bool "Memtest"
-	depends on X86_64
 	default y
 	help
 	  This option adds a kernel parameter 'memtest', which allows memtest