core: Move early_res from arch/x86 to kernel/
This makes the range reservation feature available to other
architectures.
-v2: add get_max_mapped, max_pfn_mapped only defined in x86...
to fix PPC compiling
-v3: according to hpa, add CONFIG_HAVE_EARLY_RES
-v4: fix typo about EARLY_RES in config
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <4B7B5723.4070009@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 36918d8..740b440 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -17,7 +17,6 @@
#include <linux/firmware-map.h>
#include <asm/e820.h>
-#include <asm/early_res.h>
#include <asm/proto.h>
#include <asm/setup.h>
@@ -752,6 +751,15 @@
{
return find_e820_area(start, end, size, align);
}
+
+u64 __init get_max_mapped(void)
+{
+ u64 end = max_pfn_mapped;
+
+ end <<= PAGE_SHIFT;
+
+ return end;
+}
/*
* Find next free range after *start
*/