linux-kernel - mm: huge_memory.c:2736:31: error: variable 'page' is uninitialized when used here [-Werror,-Wuninitialized]

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Date: Wed, 26 Jun 2024 22:14:56 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: open list <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>, 
	lkft-triage@...ts.linaro.org, clang-built-linux <llvm@...ts.linux.dev>
Cc: Andrew Morton <akpm@...ux-foundation.org>, Arnd Bergmann <arnd@...db.de>, 
	Lance Yang <ioworker0@...il.com>
Subject: mm: huge_memory.c:2736:31: error: variable 'page' is uninitialized
 when used here [-Werror,-Wuninitialized]

The x86_64 clang builds failed on Linux next due to these warnings / errors.

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

Build error:
------
mm/huge_memory.c:2736:31: error: variable 'page' is uninitialized when
used here [-Werror,-Wuninitialized]
 2736 |         folio_remove_rmap_pmd(folio, page, vma);
      |                                      ^~~~
/builds/linux/mm/huge_memory.c:2700:19: note: initialize the variable
'page' to silence this warning
 2700 |         struct page *page;
      |                          ^
      |                           = NULL
1 error generated.

patch that is causing this build failures,
  mm/vmscan: avoid split lazyfree THP during shrink_folio_list()

metadata:

--
  git_describe: next-20240625
  git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
  git_short_log: 0fc4bfab2cd4 ("Add linux-next specific files for 20240625")
  arch: x86_64
  toolchain: clang-18

Links:
 - https://storage.tuxsuite.com/public/linaro/lkft/builds/2iNfPlsMdxsqZTOC14r1xZZxq8X/
 - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240625/testrun/24448204/suite/build/test/clang-18-lkftconfig/details/

--
Linaro LKFT
https://lkft.linaro.org