linux-kernel - linux-next: build failure after merge of the dma-mapping tree

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Date: Wed, 8 May 2024 09:16:31 +1000
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: Christoph Hellwig <hch@....de>
Cc: Alexander Lobakin <aleksander.lobakin@...el.com>, Linux Kernel Mailing
 List <linux-kernel@...r.kernel.org>, Linux Next Mailing List
 <linux-next@...r.kernel.org>
Subject: linux-next: build failure after merge of the dma-mapping tree

Hi all,

After merging the dma-mapping tree, today's linux-next build (x86_64
allmodconfig) failed like this:

net/core/page_pool.c: In function '__page_pool_dma_sync_for_device':
net/core/page_pool.c:406:54: error: passing argument 1 of 'page_pool_get_dma_addr' discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers]
  406 |         dma_addr_t dma_addr = page_pool_get_dma_addr(page);
      |                                                      ^~~~
In file included from net/core/page_pool.c:13:
include/net/page_pool/helpers.h:373:62: note: expected 'struct page *' but argument is of type 'const struct page *'
  373 | static inline dma_addr_t page_pool_get_dma_addr(struct page *page)
      |                                                 ~~~~~~~~~~~~~^~~~
cc1: all warnings being treated as errors

Caused by commit

  8bf4d7154d4c ("page_pool: check for DMA sync shortcut earlier")

I have used the dma-mapping tree from next-20240507 for today.

-- 
Cheers,
Stephen Rothwell

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