Le 29/09/2015 01:41, Scott Wood a écrit :
On Tue, Sep 22, 2015 at 06:50:40PM +0200, Christophe Leroy wrote:
iounmap() cannot vunmap() area mapped by TLBCAMs either
Signed-off-by: Christophe Leroy <christophe.le...@c-s.fr>
---
No change in v2
arch/powerpc/mm/pgtable_32.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index 7692d1b..03a073a 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -278,7 +278,9 @@ void iounmap(volatile void __iomem *addr)
* If mapped by BATs then there is nothing to do.
* Calling vfree() generates a benign warning.
*/
- if (v_mapped_by_bats((unsigned long)addr)) return;
+ if (v_mapped_by_bats((unsigned long)addr) ||
+ v_mapped_by_tlbcam((unsigned long)addr))
+ return;
This is pretty pointless given that the next patch replaces both with
v_mapped_by_other().
I thought it was cleaner to first fix the bug, in order to make the
following patch straight through, but I can skip it, no problem.
Christophe
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