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| author | Yinghai Lu <yhlu.kernel@gmail.com> | 2008-07-08 18:56:38 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-09 10:43:25 +0200 |
| commit | 2dc807b37b7b8c7df445513ad2b415df4ebcaf6d (patch) | |
| tree | a28cb322758351c9549c1e73f1ebcad3d85913e2 /arch/x86/kernel/e820.c | |
| parent | 49c980df552499e5e8595b52448f612fdab0484a (diff) | |
| download | blackbird-op-linux-2dc807b37b7b8c7df445513ad2b415df4ebcaf6d.tar.gz blackbird-op-linux-2dc807b37b7b8c7df445513ad2b415df4ebcaf6d.zip | |
x86: make max_pfn cover acpi table below 4g
When system have 4g less ram installed, and acpi table sit
near end of ram, make max_pfn cover them too,
so 64bit kernel don't need to mess up fixmap.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: "Suresh Siddha" <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/e820.c')
| -rw-r--r-- | arch/x86/kernel/e820.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index e07d4019e266..2e08619a9c5c 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -1056,12 +1056,20 @@ unsigned long __initdata end_user_pfn = MAX_ARCH_PFN; /* * Find the highest page frame number we have available */ -unsigned long __init e820_end_of_ram(void) +unsigned long __init e820_end(void) { - unsigned long last_pfn; + int i; + unsigned long last_pfn = 0; unsigned long max_arch_pfn = MAX_ARCH_PFN; - last_pfn = find_max_pfn_with_active_regions(); + for (i = 0; i < e820.nr_map; i++) { + struct e820entry *ei = &e820.map[i]; + unsigned long end_pfn; + + end_pfn = (ei->addr + ei->size) >> PAGE_SHIFT; + if (end_pfn > last_pfn) + last_pfn = end_pfn; + } if (last_pfn > max_arch_pfn) last_pfn = max_arch_pfn; @@ -1192,9 +1200,7 @@ static int __init parse_memmap_opt(char *p) * the real mem size before original memory map is * reset. */ - e820_register_active_regions(0, 0, -1UL); - saved_max_pfn = e820_end_of_ram(); - remove_all_active_ranges(); + saved_max_pfn = e820_end(); #endif e820.nr_map = 0; userdef = 1; |
