[PATCH] riscv: Select HAVE_ARCH_USERFAULTFD_MINOR

From: Samuel Holland <samuel.holland@sifive.com>
To: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Samuel Holland <samuel.holland@sifive.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org
Subject: [PATCH] riscv: Select HAVE_ARCH_USERFAULTFD_MINOR
Date: Fri, 23 Jun 2023 23:03:20 -0700	[thread overview]
Message-ID: <20230624060321.3401504-1-samuel.holland@sifive.com> (raw)

This allocates the VM flag needed to support the userfaultfd minor fault
functionality. Because the flag bit is >= bit 32, it can only be enabled
for 64-bit kernels. See commit 7677f7fd8be7 ("userfaultfd: add minor
fault registration mode") for more information.

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
---

 arch/riscv/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 5966ad97c30c..21e864fa93db 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -97,6 +97,7 @@ config RISCV
 	select HAVE_ARCH_THREAD_STRUCT_WHITELIST
 	select HAVE_ARCH_TRACEHOOK
 	select HAVE_ARCH_TRANSPARENT_HUGEPAGE if 64BIT && MMU
+	select HAVE_ARCH_USERFAULTFD_MINOR if 64BIT && USERFAULTFD
 	select HAVE_ARCH_VMAP_STACK if MMU && 64BIT
 	select HAVE_ASM_MODVERSIONS
 	select HAVE_CONTEXT_TRACKING_USER
-- 
2.40.1


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