linux-kernel - [PATCH] mm: page-flags: fix build failure due to missing parameter for HasHWPoisoned flag

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Message-Id: <20211101194336.305546-1-shy828301@gmail.com>
Date:   Mon,  1 Nov 2021 12:43:36 -0700
From:   Yang Shi <shy828301@...il.com>
To:     naresh.kamboju@...aro.org, willy@...radead.org,
        kirill.shutemov@...ux.intel.com, naoya.horiguchi@....com,
        akpm@...ux-foundation.org
Cc:     shy828301@...il.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] mm: page-flags: fix build failure due to missing parameter for HasHWPoisoned flag

The below build failure when !CONFIG_MEMORY_FAILURE was reported for
v5.16 merge window:
In file included from include/linux/mmzone.h:22,
                 from include/linux/gfp.h:6,
                 from include/linux/slab.h:15,
                 from include/linux/crypto.h:20,
                 from arch/x86/kernel/asm-offsets.c:9:
include/linux/page-flags.h:806:29: error: macro "PAGEFLAG_FALSE"
requires 2 arguments, but only 1 given
  806 | PAGEFLAG_FALSE(HasHWPoisoned)
      |                             ^
include/linux/page-flags.h:411: note: macro "PAGEFLAG_FALSE" defined here
  411 | #define PAGEFLAG_FALSE(uname, lname) TESTPAGEFLAG_FALSE(uname, lname)   \
      |
include/linux/page-flags.h:807:39: error: macro "TESTSCFLAG_FALSE"
requires 2 arguments, but only 1 given
  807 |         TESTSCFLAG_FALSE(HasHWPoisoned)
      |                                       ^
include/linux/page-flags.h:414: note: macro "TESTSCFLAG_FALSE" defined here
  414 | #define TESTSCFLAG_FALSE(uname, lname)
         \
      |
include/linux/page-flags.h:806:1: error: unknown type name 'PAGEFLAG_FALSE'
  806 | PAGEFLAG_FALSE(HasHWPoisoned)
      | ^~~~~~~~~~~~~~
include/linux/page-flags.h:807:25: error: expected ';' before 'static'
  807 |         TESTSCFLAG_FALSE(HasHWPoisoned)
      |                         ^
      |                         ;
......
  815 | static inline bool is_page_hwpoison(struct page *page)
      | ~~~~~~
make[2]: *** [scripts/Makefile.build:121: arch/x86/kernel/asm-offsets.s] Error 1

The commit d389a4a81155 ("mm: Add folio flag manipulation functions")
changed the definition of PAGEFLAG macros, this caused the build failure
for HasHWPoisoned flag.  The new flag was introduced by commit
eac96c3efdb5 ("mm: filemap: check if THP has hwpoisoned subpage for PMD
page fault") in v5.15-rc7.  But the folio series pull request was
prepared before v5.15, so this new flag was missed.

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
Cc: Naresh Kamboju <naresh.kamboju@...aro.org>
Cc: Matthew Wilcox <willy@...radead.org>
Cc: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Cc: Naoya Horiguchi <naoya.horiguchi@....com>
Signed-off-by: Yang Shi <shy828301@...il.com>
---
 include/linux/page-flags.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index d8623d6e1141..981341a3c3c4 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -803,8 +803,8 @@ PAGEFLAG_FALSE(DoubleMap, double_map)
 PAGEFLAG(HasHWPoisoned, has_hwpoisoned, PF_SECOND)
 	TESTSCFLAG(HasHWPoisoned, has_hwpoisoned, PF_SECOND)
 #else
-PAGEFLAG_FALSE(HasHWPoisoned)
-	TESTSCFLAG_FALSE(HasHWPoisoned)
+PAGEFLAG_FALSE(HasHWPoisoned, has_hwpoisoned)
+	TESTSCFLAG_FALSE(HasHWPoisoned, has_hwpoisoned)
 #endif
 
 /*
-- 
2.26.2