Commit f56d005d authored Feb 04, 2008 by Thomas Gleixner Committed by Ingo Molnar Feb 04, 2008

x86: no CPA on iounmap

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>

parent 75ab43bf

arch/x86/mm/ioremap.c

+0 −3

Original line number	Diff line number	Diff line
		@@ -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);