linux-kernel - [PATCH -next] riscv/mm: Fix build error while PAGE_TABLE

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Date:   Fri, 24 Jun 2022 16:52:36 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     <paul.walmsley@...ive.com>, <palmer@...belt.com>,
        <aou@...s.berkeley.edu>, <akpm@...ux-foundation.org>,
        <pasha.tatashin@...een.com>, <tongtiangen@...wei.com>
CC:     <linux-riscv@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        YueHaibing <yuehaibing@...wei.com>
Subject: [PATCH -next] riscv/mm: Fix build error while PAGE_TABLE_CHECK enabled without MMU

mm/page_table_check.c: In function ‘__page_table_check_pte_clear’:
mm/page_table_check.c:148:6: error: implicit declaration of function ‘pte_user_accessible_page’; did you mean ‘user_access_save’? [-Werror=implicit-function-declaration]
  if (pte_user_accessible_page(pte)) {
      ^~~~~~~~~~~~~~~~~~~~~~~~
      user_access_save

ARCH_SUPPORTS_PAGE_TABLE_CHECK should only enabled with MMU.

Fixes: 3fee229a8eb9 ("riscv/mm: enable ARCH_SUPPORTS_PAGE_TABLE_CHECK")
Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 arch/riscv/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 850f6fbb0b5f..d6a07b9add05 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -38,7 +38,7 @@ config RISCV
 	select ARCH_SUPPORTS_ATOMIC_RMW
 	select ARCH_SUPPORTS_DEBUG_PAGEALLOC if MMU
 	select ARCH_SUPPORTS_HUGETLBFS if MMU
-	select ARCH_SUPPORTS_PAGE_TABLE_CHECK
+	select ARCH_SUPPORTS_PAGE_TABLE_CHECK if MMU
 	select ARCH_USE_MEMTEST
 	select ARCH_USE_QUEUED_RWLOCKS
 	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU
-- 
2.17.1