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[PATCH] initialize end of memory variables as early as possible

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While an earlier patch already did a small step into that direction,
this patch moves initialization of all memory end variables to as
early as possible, so that dependent code doesn't need to check
whether these variables have already been set.

Also, remove a misleading (perhaps just outdated) comment, and make
static a variable only used in a single file.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
Jan Beulich 2006-09-26 10:52:31 +02:00 committed by Andi Kleen
parent 44cc45267b
commit caff0710eb
3 changed files with 7 additions and 8 deletions
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2
arch/x86_64/kernel/e820.c
View file

@ -40,7 +40,7 @@ unsigned long end_pfn_map;
/*
* Last pfn which the user wants to use.
*/
unsigned long end_user_pfn = MAXMEM>>PAGE_SHIFT;
static unsigned long __initdata end_user_pfn = MAXMEM>>PAGE_SHIFT;
extern struct resource code_resource, data_resource;

7
arch/x86_64/kernel/setup.c
View file

@ -554,7 +554,7 @@ void __init setup_arch(char **cmdline_p)
* we are rounding upwards:
*/
end_pfn = e820_end_of_ram();
num_physpages = end_pfn; /* for pfn_valid */
num_physpages = end_pfn;
check_efer();
@ -574,6 +574,11 @@ void __init setup_arch(char **cmdline_p)
acpi_boot_table_init();
#endif
/* How many end-of-memory variables you have, grandma! */
max_low_pfn = end_pfn;
max_pfn = end_pfn;
high_memory = (void *)__va(end_pfn * PAGE_SIZE - 1) + 1;
#ifdef CONFIG_ACPI_NUMA
/*
* Parse SRAT to discover nodes.

6
arch/x86_64/mm/init.c
View file

@ -597,12 +597,6 @@ void __init mem_init(void)
pci_iommu_alloc();
/* How many end-of-memory variables you have, grandma! */
max_low_pfn = end_pfn;
max_pfn = end_pfn;
num_physpages = end_pfn;
high_memory = (void *) __va(end_pfn * PAGE_SIZE);
/* clear the zero-page */
memset(empty_zero_page, 0, PAGE_SIZE);