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Date: Fri, 22 Mar 2019 12:16:16 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Jonathan Neuschafer <j.neuschaefer@....net>, Christophe Leroy <christophe.leroy@....fr>, Michael Ellerman <mpe@...erman.id.au> Subject: [PATCH 5.0 157/238] powerpc/wii: properly disable use of BATs when requested. 5.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Christophe Leroy <christophe.leroy@....fr> commit 6d183ca8baec983dc4208ca45ece3c36763df912 upstream. 'nobats' kernel parameter or some options like CONFIG_DEBUG_PAGEALLOC deny the use of BATS for mapping memory. This patch makes sure that the specific wii RAM mapping function takes it into account as well. Fixes: de32400dd26e ("wii: use both mem1 and mem2 as ram") Cc: stable@...r.kernel.org Reviewed-by: Jonathan Neuschafer <j.neuschaefer@....net> Signed-off-by: Christophe Leroy <christophe.leroy@....fr> Signed-off-by: Michael Ellerman <mpe@...erman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- arch/powerpc/platforms/embedded6xx/wii.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/arch/powerpc/platforms/embedded6xx/wii.c +++ b/arch/powerpc/platforms/embedded6xx/wii.c @@ -83,6 +83,10 @@ unsigned long __init wii_mmu_mapin_mem2( /* MEM2 64MB@...0000000 */ delta = wii_hole_start + wii_hole_size; size = top - delta; + + if (__map_without_bats) + return delta; + for (bl = 128<<10; bl < max_size; bl <<= 1) { if (bl * 2 > size) break;
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