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Subject[PATCH] x86: remove end_user_pfn
Date

e820 map already get updated, so don't need to keep that anymore

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

---
arch/x86/kernel/e820.c | 19 ++-----------------
1 file changed, 2 insertions(+), 17 deletions(-)

Index: linux-2.6/arch/x86/kernel/e820.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/e820.c
+++ linux-2.6/arch/x86/kernel/e820.c
@@ -1049,11 +1049,6 @@ u64 __init early_reserve_e820(u64 startt
#endif

/*
- * Last pfn which the user wants to use.
- */
-unsigned long __initdata end_user_pfn = MAX_ARCH_PFN;
-
-/*
* Find the highest page frame number we have available
*/
static unsigned long __init e820_end_pfn(unsigned long limit_pfn, unsigned type)
@@ -1085,8 +1080,6 @@ static unsigned long __init e820_end_pfn

if (last_pfn > max_arch_pfn)
last_pfn = max_arch_pfn;
- if (last_pfn > end_user_pfn)
- last_pfn = end_user_pfn;

printk(KERN_INFO "last_pfn = %#lx max_arch_pfn = %#lx\n",
last_pfn, max_arch_pfn);
@@ -1131,12 +1124,6 @@ int __init e820_find_active_region(const
if (*ei_endpfn > last_pfn)
*ei_endpfn = last_pfn;

- /* Obey end_user_pfn to save on memmap */
- if (*ei_startpfn >= end_user_pfn)
- return 0;
- if (*ei_endpfn > end_user_pfn)
- *ei_endpfn = end_user_pfn;
-
return 1;
}

@@ -1201,7 +1188,6 @@ static int __init parse_memopt(char *p)

userdef = 1;
mem_size = memparse(p, &p);
- end_user_pfn = mem_size>>PAGE_SHIFT;
e820_remove_range(mem_size, ULLONG_MAX - mem_size, E820_RAM, 1);

return 0;
@@ -1245,10 +1231,9 @@ static int __init parse_memmap_opt(char
} else if (*p == '$') {
start_at = memparse(p+1, &p);
e820_add_region(start_at, mem_size, E820_RESERVED);
- } else {
- end_user_pfn = (mem_size >> PAGE_SHIFT);
+ } else
e820_remove_range(mem_size, ULLONG_MAX - mem_size, E820_RAM, 1);
- }
+
return *p == '\0' ? 0 : -EINVAL;
}
early_param("memmap", parse_memmap_opt);

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