Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f56d005d30342a45d8af2b75ecccc82200f09600
Commit:     f56d005d30342a45d8af2b75ecccc82200f09600
Parent:     75ab43bfce51085ffd627c470f48ae49ba6e6da3
Author:     Thomas Gleixner <[EMAIL PROTECTED]>
AuthorDate: Mon Feb 4 16:48:05 2008 +0100
Committer:  Ingo Molnar <[EMAIL PROTECTED]>
CommitDate: Mon Feb 4 16:48:05 2008 +0100

    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 <[EMAIL PROTECTED]>
    Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
---
 arch/x86/mm/ioremap.c |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)

diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 4e21231..ee6648f 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -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);
-
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