diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-02-12 15:16:03 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-12 15:21:17 +0100 |
| commit | d88316c243e5458a1888edbe0353c4dec6e61c73 (patch) | |
| tree | 6c4c87c1c415ac6b8684c15d779580f721529da4 /arch | |
| parent | 4769843bc265a9c24584b98709cf39e1df5c1404 (diff) | |
x86, 32-bit: refactor find_low_pfn_range()
Impact: cleanup
Make the max_low_pfn logic a bit more standard between
lowmem_pfn_init() and highmem_pfn_init().
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/mm/init_32.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index 9d36eb9ebd53..1a9612499a34 100644 --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -687,6 +687,9 @@ early_param("highmem", parse_highmem); */ void __init lowmem_pfn_init(void) { + /* max_low_pfn is 0, we already have early_res support */ + max_low_pfn = max_pfn; + if (highmem_pages == -1) highmem_pages = 0; #ifdef CONFIG_HIGHMEM @@ -720,6 +723,8 @@ void __init lowmem_pfn_init(void) */ void __init highmem_pfn_init(void) { + max_low_pfn = MAXMEM_PFN; + if (highmem_pages == -1) highmem_pages = max_pfn - MAXMEM_PFN; @@ -732,7 +737,6 @@ void __init highmem_pfn_init(void) pages_to_mb(highmem_pages)); highmem_pages = 0; } - max_low_pfn = MAXMEM_PFN; #ifndef CONFIG_HIGHMEM /* Maximum memory usable is what is directly addressable */ printk(KERN_WARNING "Warning only %ldMB will be used.\n", MAXMEM>>20); @@ -758,13 +762,10 @@ void __init find_low_pfn_range(void) { /* it could update max_pfn */ - /* max_low_pfn is 0, we already have early_res support */ - max_low_pfn = max_pfn; - - if (max_low_pfn > MAXMEM_PFN) - highmem_pfn_init(); - else + if (max_pfn <= MAXMEM_PFN) lowmem_pfn_init(); + else + highmem_pfn_init(); } #ifndef CONFIG_NEED_MULTIPLE_NODES |