i386 boot: replace boot_ioremap with enhanced bt_ioremap - enhance bt_ioremap
This patch makes it possible for bt_ioremap() to be used before paging_init(), via providing an early implementation of set_fixmap() that can be used before paging_init(). This way boot_ioremap() can be replaced by bt_ioremap(). Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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@@ -429,9 +429,11 @@ static void __init pagetable_init (void)
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* Fixed mappings, only the page table structure has to be
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* created - mappings will be set by set_fixmap():
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*/
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bt_ioremap_clear();
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vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
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end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK;
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page_table_range_init(vaddr, end, pgd_base);
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bt_ioremap_reset();
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permanent_kmaps_init(pgd_base);
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