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x86: early_ioremap_init(), enhance warnings

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enhance the debug warning in early_ioremap_init().

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ingo Molnar 2008-01-30 13:33:49 +01:00
parent 927222b102
commit 0e3a954929
1 changed files with 16 additions and 1 deletions
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17
arch/x86/mm/ioremap_32.c
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@ -243,7 +243,22 @@ void __init early_ioremap_init(void)
pgd = early_ioremap_pgd(fix_to_virt(FIX_BTMAP_BEGIN));
*pgd = __pa(bm_pte) | _PAGE_TABLE;
memset(bm_pte, 0, sizeof(bm_pte));
BUG_ON(pgd != early_ioremap_pgd(fix_to_virt(FIX_BTMAP_END)));
/*
* The boot-ioremap range spans multiple pgds, for which
* we are not prepared:
*/
if (pgd != early_ioremap_pgd(fix_to_virt(FIX_BTMAP_END))) {
WARN_ON(1);
printk("pgd %p != %p\n",
pgd, early_ioremap_pgd(fix_to_virt(FIX_BTMAP_END)));
printk("fix_to_virt(FIX_BTMAP_BEGIN): %08lx\n",
fix_to_virt(FIX_BTMAP_BEGIN));
printk("fix_to_virt(FIX_BTMAP_END): %08lx\n",
fix_to_virt(FIX_BTMAP_END));
printk("FIX_BTMAP_END: %d\n", FIX_BTMAP_END);
printk("FIX_BTMAP_BEGIN: %d\n", FIX_BTMAP_BEGIN);
}
}
void __init early_ioremap_clear(void)