Commit 0e3a9549 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

x86: early_ioremap_init(), enhance warnings 



enhance the debug warning in early_ioremap_init().

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 927222b1

arch/x86/mm/ioremap_32.c

+16 −1
Original line number Diff line number Diff line
@@ -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)