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| author |   Pekka Enberg <penberg@cs.helsinki.fi> | 2009-03-05 14:54:54 +0200 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2009-03-05 14:17:11 +0100 |
| commit | 49a2bf7303b0dc5fccbb3ff7cf2e7751f0e3953d (patch) | |
| tree | 00d72cbbe8e048e586c1cee24f6e832b0d306e86 /arch/x86/mm/init_64.c | |
| parent | x86: add gbpages support to 32-bit init_memory_mapping() (diff) | |
| download | linux-dev-49a2bf7303b0dc5fccbb3ff7cf2e7751f0e3953d.tar.xz linux-dev-49a2bf7303b0dc5fccbb3ff7cf2e7751f0e3953d.zip | |
x86: find_early_table_space() unification
Impact: cleanup
There are some minor differences between the 32-bit and 64-bit
find_early_table_space() functions. This patch wraps those
differences under CONFIG_X86_32 to make the function identical
on both configurations.
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <1236257708-27269-3-git-send-email-penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/mm/init_64.c')
| -rw-r--r-- | arch/x86/mm/init_64.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index cdb3be1c41f1..151e5ba34412 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -569,19 +569,33 @@ static void __init find_early_table_space(unsigned long end, int use_pse, unsigned long extra; extra = end - ((end>>PMD_SHIFT) << PMD_SHIFT); +#ifdef CONFIG_X86_32 + extra += PMD_SIZE; +#endif ptes = (extra + PAGE_SIZE - 1) >> PAGE_SHIFT; } else ptes = (end + PAGE_SIZE - 1) >> PAGE_SHIFT; tables += roundup(ptes * sizeof(pte_t), PAGE_SIZE); +#ifdef CONFIG_X86_32 + /* for fixmap */ + tables += roundup(__end_of_fixed_addresses * sizeof(pte_t), PAGE_SIZE); +#endif + /* * RED-PEN putting page tables only on node 0 could * cause a hotspot and fill up ZONE_DMA. The page tables * need roughly 0.5KB per GB. */ +#ifdef CONFIG_X86_32 + start = 0x7000; + table_start = find_e820_area(start, max_pfn_mapped<<PAGE_SHIFT, + tables, PAGE_SIZE); +#else /* CONFIG_X86_64 */ start = 0x8000; table_start = find_e820_area(start, end, tables, PAGE_SIZE); +#endif if (table_start == -1UL) panic("Cannot find space for the kernel page tables"); |