linux-kernel - [PATCH 02/20] ARC: uaccess: use optimized generic __strnlen_user/__strncpy_from

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Message-Id: <20230815004813.555115-3-vgupta@kernel.org>
Date:   Mon, 14 Aug 2023 17:47:55 -0700
From:   Vineet Gupta <vgupta@...nel.org>
To:     linux-snps-arc@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org,
        Shahab Vahedi <Shahab.Vahedi@...opsys.com>,
        Alexey Brodkin <abrodkin@...opsys.com>,
        Vineet Gupta <vgupta@...nel.org>
Subject: [PATCH 02/20] ARC: uaccess: use optimized generic __strnlen_user/__strncpy_from_user

The existing ARC variants have 2 issues
 - Use ZOL which may not be present in forthcoming architecture
 - Byte loop based vs. generic version which is word loop based

Signed-off-by: Vineet Gupta <vgupta@...nel.org>
---
 arch/arc/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 96cf8720bb93..47b4acc7d0c9 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -26,6 +26,8 @@ config ARC
 	select GENERIC_PENDING_IRQ if SMP
 	select GENERIC_SCHED_CLOCK
 	select GENERIC_SMP_IDLE_THREAD
+	select GENERIC_STRNCPY_FROM_USER if MMU
+	select GENERIC_STRNLEN_USER if MMU
 	select HAVE_ARCH_KGDB
 	select HAVE_ARCH_TRACEHOOK
 	select HAVE_ARCH_TRANSPARENT_HUGEPAGE if ARC_MMU_V4
-- 
2.34.1