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x86: no CPA on iounmap

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When an ioremap is unmapped, do not change the page attributes. There might
be another mapping of the same physical address. PAT might detect a conflicting
mapping attribute for no good reason. The mapping is removed anyway.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner 2008-02-04 16:48:05 +01:00 committed by Ingo Molnar
parent 75ab43bfce
commit f56d005d30
1 changed files with 0 additions and 3 deletions
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3
arch/x86/mm/ioremap.c
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@ -240,9 +240,6 @@ void iounmap(volatile void __iomem *addr)
return;
}
/* Reset the direct mapping. Can block */
ioremap_change_attr(p->phys_addr, p->size, IOR_MODE_CACHED);
/* Finally remove it */
o = remove_vm_area((void *)addr);
BUG_ON(p != o || o == NULL);