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authorKumar Gala <galak@kernel.crashing.org>2009-02-10 10:57:46 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-02-11 16:07:02 +1100
commitf99fb8a2cbf0fd9ce9b2d5d298943d0d4dc479f7 (patch)
tree6412544d8bfa43be47dd959a999680c077240d80 /arch
parent1db8508cf483dc1ecf66141f90a7c03659d69512 (diff)
downloadlinux-f99fb8a2cbf0fd9ce9b2d5d298943d0d4dc479f7.tar.bz2
powerpc/mm: Fix _PAGE_COHERENT support on classic ppc32 HW
The following commit: commit 64b3d0e8122b422e879b23d42f9e0e8efbbf9744 Author: Benjamin Herrenschmidt <benh@kernel.crashing.org> Date: Thu Dec 18 19:13:51 2008 +0000 powerpc/mm: Rework usage of _PAGE_COHERENT/NO_CACHE/GUARDED broke setting of the _PAGE_COHERENT bit in the PPC HW PTE. Since we now actually set _PAGE_COHERENT in the Linux PTE we shouldn't be clearing it out before we propogate it to the PPC HW PTE. Reported-by: Martyn Welch <martyn.welch@gefanuc.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/mm/hash_low_32.S2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/mm/hash_low_32.S b/arch/powerpc/mm/hash_low_32.S
index 67850ec9feb3..14af8cedab70 100644
--- a/arch/powerpc/mm/hash_low_32.S
+++ b/arch/powerpc/mm/hash_low_32.S
@@ -320,7 +320,7 @@ _GLOBAL(create_hpte)
and r8,r8,r0 /* writable if _RW & _DIRTY */
rlwimi r5,r5,32-1,30,30 /* _PAGE_USER -> PP msb */
rlwimi r5,r5,32-2,31,31 /* _PAGE_USER -> PP lsb */
- ori r8,r8,0xe14 /* clear out reserved bits and M */
+ ori r8,r8,0xe04 /* clear out reserved bits */
andc r8,r5,r8 /* PP = user? (rw&dirty? 2: 3): 0 */
BEGIN_FTR_SECTION
rlwinm r8,r8,0,~_PAGE_COHERENT /* clear M (coherence not required) */