From d88316c243e5458a1888edbe0353c4dec6e61c73 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Thu, 12 Feb 2009 15:16:03 +0100 Subject: [PATCH] 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 --- arch/x86/mm/init_32.c | 15 ++++++++------- 1 file 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 -- 2.30.2