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From: Arnd Bergmann <arnd@arndb.de>
To: y2038@lists.linaro.org, linux-kernel@vger.kernel.org
Cc: Arnd Bergmann <arnd@arndb.de>
Subject: [PATCH v2 05/13] y2038: arm64: extend sysvipc compat data structures
Date: Thu, 12 Apr 2018 16:20:16 +0200	[thread overview]
Message-ID: <20180412142024.853892-6-arnd@arndb.de> (raw)
In-Reply-To: <20180412142024.853892-1-arnd@arndb.de>

Both 32-bit amd 64-bit ARM use the asm-generic header files for their
sysvipc data structures, so no special care is needed to make those
work beyond y2038, with the one exception of compat mode: Since there
is no asm-generic definition of the compat mode IPC structures, ARM64
provides its own copy, and we make those match the changes in the native
asm-generic header files.

There is sufficient padding in these data structures to extend all
timestamps to 64 bit, but on big-endian ARM kernels, the padding
is in the wrong place, so the C library has to ensure it reassembles
a 64-bit time_t correctly.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm64/include/asm/compat.h | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h
index 0030f79808b3..1a037b94eba1 100644
--- a/arch/arm64/include/asm/compat.h
+++ b/arch/arm64/include/asm/compat.h
@@ -181,10 +181,10 @@ struct compat_ipc64_perm {
 
 struct compat_semid64_ds {
 	struct compat_ipc64_perm sem_perm;
-	compat_time_t  sem_otime;
-	compat_ulong_t __unused1;
-	compat_time_t  sem_ctime;
-	compat_ulong_t __unused2;
+	compat_ulong_t sem_otime;
+	compat_ulong_t sem_otime_high;
+	compat_ulong_t sem_ctime;
+	compat_ulong_t sem_ctime_high;
 	compat_ulong_t sem_nsems;
 	compat_ulong_t __unused3;
 	compat_ulong_t __unused4;
@@ -192,12 +192,12 @@ struct compat_semid64_ds {
 
 struct compat_msqid64_ds {
 	struct compat_ipc64_perm msg_perm;
-	compat_time_t  msg_stime;
-	compat_ulong_t __unused1;
-	compat_time_t  msg_rtime;
-	compat_ulong_t __unused2;
-	compat_time_t  msg_ctime;
-	compat_ulong_t __unused3;
+	compat_ulong_t msg_stime;
+	compat_ulong_t msg_stime_high;
+	compat_ulong_t msg_rtime;
+	compat_ulong_t msg_rtime_high;
+	compat_ulong_t msg_ctime;
+	compat_ulong_t msg_ctime_high;
 	compat_ulong_t msg_cbytes;
 	compat_ulong_t msg_qnum;
 	compat_ulong_t msg_qbytes;
@@ -210,12 +210,12 @@ struct compat_msqid64_ds {
 struct compat_shmid64_ds {
 	struct compat_ipc64_perm shm_perm;
 	compat_size_t  shm_segsz;
-	compat_time_t  shm_atime;
-	compat_ulong_t __unused1;
-	compat_time_t  shm_dtime;
-	compat_ulong_t __unused2;
-	compat_time_t  shm_ctime;
-	compat_ulong_t __unused3;
+	compat_ulong_t shm_atime;
+	compat_ulong_t shm_atime_high;
+	compat_ulong_t shm_dtime;
+	compat_ulong_t shm_dtime_high;
+	compat_ulong_t shm_ctime;
+	compat_ulong_t shm_ctime_high;
 	compat_pid_t   shm_cpid;
 	compat_pid_t   shm_lpid;
 	compat_ulong_t shm_nattch;
-- 
2.9.0

  parent reply	other threads:[~2018-04-12 14:23 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-12 14:20 [PATCH v2 00/13] y2038: convert IPC syscalls Arnd Bergmann
2018-04-12 14:20 ` Arnd Bergmann
2018-04-12 14:20 ` [PATCH v2 01/13] y2038: asm-generic: extend sysvipc data structures Arnd Bergmann
2018-04-12 14:20 ` [PATCH v2 02/13] y2038: alpha: remove unneeded ipc uapi header files Arnd Bergmann
2018-04-12 14:20 ` [PATCH v2 03/13] y2038: ia64: " Arnd Bergmann
2018-04-12 14:20 ` [PATCH v2 04/13] y2038: s390: " Arnd Bergmann
2018-04-12 14:20 ` Arnd Bergmann [this message]
2018-04-12 14:20 ` [PATCH v2 06/13] y2038: mips: extend sysvipc data structures Arnd Bergmann
2018-04-12 14:20 ` [PATCH v2 07/13] y2038: x86: " Arnd Bergmann
2018-04-12 14:20 ` [PATCH v2 08/13] y2038: parisc: " Arnd Bergmann
2018-04-12 14:20 ` [PATCH v2 09/13] y2038: sparc: " Arnd Bergmann
2018-04-12 14:20 ` [PATCH v2 10/13] y2038: powerpc: " Arnd Bergmann
2018-04-12 14:20 ` [PATCH v2 11/13] y2038: xtensa: " Arnd Bergmann
2018-04-12 14:20 ` [PATCH v2 12/13] y2038: ipc: use ktime_get_real_seconds consistently Arnd Bergmann
2018-04-12 14:20 ` [PATCH v2 13/13] y2038: ipc: report long times to user space Arnd Bergmann

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