Subject: Re: linux-next: build failure after merge of the akpm-current tree

From: Mike Rapoport <[email-masked]>
Date: Thu, 27 Aug 2020 15:45:49 +0300

On Thu, Aug 27, 2020 at 06:20:58PM +1000, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the akpm-current tree, today's linux-next build (mips
> cavium_octeon_defconfig) failed like this:
> 
> arch/mips/cavium-octeon/dma-octeon.c:205:7: error: ‘mem’ undeclared (first use in this function); did you mean ‘sem’?
> 
> Caused by commit
> 
>   52e1a745395d ("arch, drivers: replace for_each_membock() with for_each_mem_range()")
> 
> Reported by "kernelci.org bot" <[email-masked]>.

Here's the fix:

>From 9e46da6793528e35883ff81835d65a864bf98007 Mon Sep 17 00:00:00 2001
From: Mike Rapoport <[email-masked]>
Date: Thu, 27 Aug 2020 15:42:49 +0300
Subject: [PATCH] mips: fix cavium-octeon build caused by memblock refactoring
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MIPS cavium_octeon_defconfig build failed like this:

arch/mips/cavium-octeon/dma-octeon.c:205:7: error: ‘mem’ undeclared
(first use in this function); did you mean ‘sem’?

Caused by patch ("arch, drivers: replace for_each_membock() with
for_each_mem_range()")

Replacing stale 'mem->base' reference with 'start' fixes the issue.

Reported by "kernelci.org bot" <[email-masked]>.
Signed-off-by: Mike Rapoport <[email-masked]>
---
 arch/mips/cavium-octeon/dma-octeon.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/mips/cavium-octeon/dma-octeon.c b/arch/mips/cavium-octeon/dma-octeon.c
index d938c1f7c1e1..ad1aecc4b401 100644
--- a/arch/mips/cavium-octeon/dma-octeon.c
+++ b/arch/mips/cavium-octeon/dma-octeon.c
@@ -202,7 +202,7 @@ void __init plat_swiotlb_setup(void)
 
 	for_each_mem_range(i, &start, &end) {
 		/* These addresses map low for PCI. */
-		if (mem->base > 0x410000000ull && !OCTEON_IS_OCTEON2())
+		if (start > 0x410000000ull && !OCTEON_IS_OCTEON2())
 			continue;
 
 		addr_size += (end - start);
-- 
2.26.2