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x86: cleanup e820_setup_gap(), v2

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e820_search_gap also take a end_addr parameter to limit search from
start_addr to end_addr.

Signed-off-by: AloK N Kataria <akataria@vmware.com>
Acked-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: "lenb@kernel.org" <lenb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Alok Kataria 2008-06-25 11:02:42 -07:00 committed by Ingo Molnar
parent 6a2f47ca27
commit fd6493e166
2 changed files with 8 additions and 6 deletions
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12
arch/x86/kernel/e820.c
View File

@ -487,17 +487,19 @@ void __init update_e820(void)
printk(KERN_INFO "modified physical RAM map:\n");
e820_print_map("modified");
}
#define MAX_GAP_END 0x100000000ull
/*
* Search for a gap in the e820 memory space from start_addr to 2^32.
* Search for a gap in the e820 memory space from start_addr to end_addr.
*/
__init int e820_search_gap(unsigned long *gapstart, unsigned long *gapsize,
unsigned long start_addr)
unsigned long start_addr, unsigned long long end_addr)
{
unsigned long long last = 0x100000000ull;
unsigned long long last;
int i = e820.nr_map;
int found = 0;
last = (end_addr && end_addr < MAX_GAP_END) ? end_addr : MAX_GAP_END;
while (--i >= 0) {
unsigned long long start = e820.map[i].addr;
unsigned long long end = start + e820.map[i].size;
@ -537,7 +539,7 @@ __init void e820_setup_gap(void)
gapstart = 0x10000000;
gapsize = 0x400000;
found = e820_search_gap(&gapstart, &gapsize, 0);
found = e820_search_gap(&gapstart, &gapsize, 0, MAX_GAP_END);
#ifdef CONFIG_X86_64
if (!found) {

2
include/asm-x86/e820.h
View File

@ -75,7 +75,7 @@ extern u64 e820_remove_range(u64 start, u64 size, unsigned old_type,
extern void update_e820(void);
extern void e820_setup_gap(void);
extern int e820_search_gap(unsigned long *gapstart, unsigned long *gapsize,
unsigned long start_addr);
unsigned long start_addr, unsigned long long end_addr);
struct setup_data;
extern void parse_e820_ext(struct setup_data *data, unsigned long pa_data);