linux-kernel - [PATCH] ipc: Fix building compat mode without sysvipc

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Date:   Wed,  6 Mar 2019 15:29:28 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     y2038@...ts.linaro.org
Cc:     Arnd Bergmann <arnd@...db.de>, Laura Abbott <labbott@...hat.com>,
        John Stultz <john.stultz@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        linux-api@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ipc: Fix building compat mode without sysvipc

As John Stultz noticed, my y2038 syscall series caused a link
failure when CONFIG_SYSVIPC is enabled but CONFIG_COMPAT is
enabled:

arch/arm64/kernel/sys32.o:(.rodata+0x960): undefined reference to `__arm64_compat_sys_old_semctl'
arch/arm64/kernel/sys32.o:(.rodata+0x980): undefined reference to `__arm64_compat_sys_old_msgctl'
arch/arm64/kernel/sys32.o:(.rodata+0x9a0): undefined reference to `__arm64_compat_sys_old_shmctl'

Add the missing entries in kernel/sys_ni.c for the new system
calls.

Cc: Laura Abbott <labbott@...hat.com>
Cc: John Stultz <john.stultz@...aro.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
I'm about to send off my pull requests for arm-soc, so I'd just
send another one with just this common from my y2038 tree.
---
 kernel/sys_ni.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index 85e5ccec0955..62a6c8707799 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -202,6 +202,7 @@ COND_SYSCALL(msgget);
 COND_SYSCALL(old_msgctl);
 COND_SYSCALL(msgctl);
 COND_SYSCALL_COMPAT(msgctl);
+COND_SYSCALL_COMPAT(old_msgctl);
 COND_SYSCALL(msgrcv);
 COND_SYSCALL_COMPAT(msgrcv);
 COND_SYSCALL(msgsnd);
@@ -212,6 +213,7 @@ COND_SYSCALL(semget);
 COND_SYSCALL(old_semctl);
 COND_SYSCALL(semctl);
 COND_SYSCALL_COMPAT(semctl);
+COND_SYSCALL_COMPAT(old_semctl);
 COND_SYSCALL(semtimedop);
 COND_SYSCALL(semtimedop_time32);
 COND_SYSCALL(semop);
@@ -221,6 +223,7 @@ COND_SYSCALL(shmget);
 COND_SYSCALL(old_shmctl);
 COND_SYSCALL(shmctl);
 COND_SYSCALL_COMPAT(shmctl);
+COND_SYSCALL_COMPAT(old_shmctl);
 COND_SYSCALL(shmat);
 COND_SYSCALL_COMPAT(shmat);
 COND_SYSCALL(shmdt);
-- 
2.20.0