From: Hollis Blanchard <hollisb@us.ibm.com>
Date: Mon, 10 Nov 2008 14:33:36 +0000 (+0000)
Subject: powerpc: Remove superfluous WARN_ON() from dma-noncoherent.c
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=7526ff76f84178f8c926de7e590e4c5f9d4a2e62;p=linux-beck.git

powerpc: Remove superfluous WARN_ON() from dma-noncoherent.c

I can't tell why this WARN_ON exists, and there's no comment
explaining it.  Whether the pmd is present or not, pte_alloc_kernel()
seems to handle both cases.

Booting a 440 kernel with 64K PAGE_SIZE triggers the warning, but boot
successfully completes and I see no problems beyond that.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---

diff --git a/arch/powerpc/lib/dma-noncoherent.c b/arch/powerpc/lib/dma-noncoherent.c
index 31734c0969cd..2b1ce1849344 100644
--- a/arch/powerpc/lib/dma-noncoherent.c
+++ b/arch/powerpc/lib/dma-noncoherent.c
@@ -320,7 +320,6 @@ static int __init dma_alloc_init(void)
 			ret = -ENOMEM;
 			break;
 		}
-		WARN_ON(!pmd_none(*pmd));
 
 		pte = pte_alloc_kernel(pmd, CONSISTENT_BASE);
 		if (!pte) {