linux-kernel - [PATCH 3.16 44/63] arm64: support keyctl() system call in 32-bit mode

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Message-ID: <lsq.1578512578.323963673@decadent.org.uk>
Date:   Wed, 08 Jan 2020 19:43:42 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "Will Deacon" <will.deacon@....com>,
        "Arnd Bergmann" <arnd@...db.de>,
        "Eric Biggers" <ebiggers@...gle.com>
Subject: [PATCH 3.16 44/63] arm64: support keyctl() system call in 32-bit mode

3.16.81-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Eric Biggers <ebiggers@...gle.com>

commit 5c2a625937ba49bc691089370638223d310cda9a upstream.

As is the case for a number of other architectures that have a 32-bit
compat mode, enable KEYS_COMPAT if both COMPAT and KEYS are enabled.
This allows AArch32 programs to use the keyctl() system call when
running on an AArch64 kernel.

Signed-off-by: Eric Biggers <ebiggers@...gle.com>
Signed-off-by: Will Deacon <will.deacon@....com>
Cc: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 arch/arm64/Kconfig | 4 ++++
 1 file changed, 4 insertions(+)

--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -352,6 +352,10 @@ config SYSVIPC_COMPAT
 	def_bool y
 	depends on COMPAT && SYSVIPC
 
+config KEYS_COMPAT
+	def_bool y
+	depends on COMPAT && KEYS
+
 endmenu
 
 menu "Power management options"