From: Arnd Bergmann <arnd@arndb.de>
To: y2038@lists.linaro.org
Cc: baolin.wang@linaro.org, albert.aribaud@3adev.fr,
john.stultz@linaro.org, bamvor.zhangjian@linaro.org,
ruchandani.tina@gmail.com, linux-api@vger.kernel.org,
linux-kernel@vger.kernel.org, libc-alpha@sourceware.org,
linux-arch@vger.kernel.org,
Manfred Spraul <manfred@colorfullife.com>,
Michael Kerrisk <mtk.manpages@gmail.com>,
Arnd Bergmann <arnd@arndb.de>
Subject: [PATCH 7/9] y2038: powerpc: extend sysvipc data structures
Date: Wed, 20 May 2015 17:07:23 +0200 [thread overview]
Message-ID: <1432134445-804487-8-git-send-email-arnd@arndb.de> (raw)
In-Reply-To: <1432134445-804487-1-git-send-email-arnd@arndb.de>
powerpc, uses a nonstandard variation of the generic sysvipc
data structures, intended to have the padding moved around
so it can deal with big-endian 32-bit user space that has
64-bit time_t.
powerpc has the same definition as parisc and sparc, but now also
supports little-endian mode, which is now wrong because the
padding is made for big-endian user space.
This takes just take the same approach here that we have for
the asm-generic headers and adds separate 32-bit fields for the
upper halves of the timestamps, to let libc deal with the mess
in user space.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
arch/powerpc/include/asm/compat.h | 32 ++++++++++++++++----------------
arch/powerpc/include/uapi/asm/msgbuf.h | 18 +++++++++---------
arch/powerpc/include/uapi/asm/sembuf.h | 14 +++++++-------
arch/powerpc/include/uapi/asm/shmbuf.h | 18 ++++++++----------
4 files changed, 40 insertions(+), 42 deletions(-)
diff --git a/arch/powerpc/include/asm/compat.h b/arch/powerpc/include/asm/compat.h
index 4f8901448eba..2bdcb95ca0ec 100644
--- a/arch/powerpc/include/asm/compat.h
+++ b/arch/powerpc/include/asm/compat.h
@@ -221,10 +221,10 @@ struct compat_ipc64_perm {
struct compat_semid64_ds {
struct compat_ipc64_perm sem_perm;
- unsigned int __unused1;
- compat_time_t sem_otime;
- unsigned int __unused2;
- compat_time_t sem_ctime;
+ unsigned int sem_otime_high;
+ unsigned int sem_otime;
+ unsigned int sem_ctime_high;
+ unsigned int sem_ctime;
compat_ulong_t sem_nsems;
compat_ulong_t __unused3;
compat_ulong_t __unused4;
@@ -232,12 +232,12 @@ struct compat_semid64_ds {
struct compat_msqid64_ds {
struct compat_ipc64_perm msg_perm;
- unsigned int __unused1;
- compat_time_t msg_stime;
- unsigned int __unused2;
- compat_time_t msg_rtime;
- unsigned int __unused3;
- compat_time_t msg_ctime;
+ unsigned int msg_stime_high;
+ unsigned int msg_stime;
+ unsigned int msg_rtime_high;
+ unsigned int msg_rtime;
+ unsigned int msg_ctime_high;
+ unsigned int msg_ctime;
compat_ulong_t msg_cbytes;
compat_ulong_t msg_qnum;
compat_ulong_t msg_qbytes;
@@ -249,12 +249,12 @@ struct compat_msqid64_ds {
struct compat_shmid64_ds {
struct compat_ipc64_perm shm_perm;
- unsigned int __unused1;
- compat_time_t shm_atime;
- unsigned int __unused2;
- compat_time_t shm_dtime;
- unsigned int __unused3;
- compat_time_t shm_ctime;
+ unsigned int shm_atime_high;
+ unsigned int shm_atime;
+ unsigned int shm_dtime_high;
+ unsigned int shm_dtime;
+ unsigned int shm_ctime_high;
+ unsigned int shm_ctime;
unsigned int __unused4;
compat_size_t shm_segsz;
compat_pid_t shm_cpid;
diff --git a/arch/powerpc/include/uapi/asm/msgbuf.h b/arch/powerpc/include/uapi/asm/msgbuf.h
index dd76743c7537..c5534fd3df40 100644
--- a/arch/powerpc/include/uapi/asm/msgbuf.h
+++ b/arch/powerpc/include/uapi/asm/msgbuf.h
@@ -9,18 +9,18 @@
struct msqid64_ds {
struct ipc64_perm msg_perm;
-#ifndef __powerpc64__
- unsigned int __unused1;
-#endif
+#ifdef __powerpc64__
__kernel_time_t msg_stime; /* last msgsnd time */
-#ifndef __powerpc64__
- unsigned int __unused2;
-#endif
__kernel_time_t msg_rtime; /* last msgrcv time */
-#ifndef __powerpc64__
- unsigned int __unused3;
-#endif
__kernel_time_t msg_ctime; /* last change time */
+#else
+ unsigned long msg_stime_high;
+ unsigned long msg_stime; /* last msgsnd time */
+ unsigned long msg_rtime_high;
+ unsigned long msg_rtime; /* last msgrcv time */
+ unsigned long msg_ctime_high;
+ unsigned long msg_ctime; /* last change time */
+#endif
unsigned long msg_cbytes; /* current number of bytes on queue */
unsigned long msg_qnum; /* number of messages in queue */
unsigned long msg_qbytes; /* max number of bytes on queue */
diff --git a/arch/powerpc/include/uapi/asm/sembuf.h b/arch/powerpc/include/uapi/asm/sembuf.h
index 99a41938ae3d..f78b129fd68e 100644
--- a/arch/powerpc/include/uapi/asm/sembuf.h
+++ b/arch/powerpc/include/uapi/asm/sembuf.h
@@ -14,20 +14,20 @@
* between kernel and user space.
*
* Pad space is left for:
- * - 64-bit time_t to solve y2038 problem
- * - 2 miscellaneous 32-bit values
+ * - 2 miscellaneous 32/64-bit values
*/
struct semid64_ds {
struct ipc64_perm sem_perm; /* permissions .. see ipc.h */
#ifndef __powerpc64__
- unsigned long __unused1;
-#endif
+ unsigned long sem_otime_high;
+ unsigned long sem_otime; /* last semop time */
+ unsigned long sem_ctime_high;
+ unsigned long sem_ctime; /* last change time */
+#else
__kernel_time_t sem_otime; /* last semop time */
-#ifndef __powerpc64__
- unsigned long __unused2;
-#endif
__kernel_time_t sem_ctime; /* last change time */
+#endif
unsigned long sem_nsems; /* no. of semaphores in array */
unsigned long __unused3;
unsigned long __unused4;
diff --git a/arch/powerpc/include/uapi/asm/shmbuf.h b/arch/powerpc/include/uapi/asm/shmbuf.h
index 8efa39698b6c..c57bfec7317c 100644
--- a/arch/powerpc/include/uapi/asm/shmbuf.h
+++ b/arch/powerpc/include/uapi/asm/shmbuf.h
@@ -21,19 +21,17 @@
struct shmid64_ds {
struct ipc64_perm shm_perm; /* operation perms */
-#ifndef __powerpc64__
- unsigned long __unused1;
-#endif
+#ifdef __powerpc64__
__kernel_time_t shm_atime; /* last attach time */
-#ifndef __powerpc64__
- unsigned long __unused2;
-#endif
__kernel_time_t shm_dtime; /* last detach time */
-#ifndef __powerpc64__
- unsigned long __unused3;
-#endif
__kernel_time_t shm_ctime; /* last change time */
-#ifndef __powerpc64__
+#else
+ unsigned long shm_atime_high;
+ unsigned long shm_atime; /* last attach time */
+ unsigned long shm_dtime_high;
+ unsigned long shm_dtime; /* last detach time */
+ unsigned long shm_ctime_high;
+ unsigned long shm_ctime; /* last change time */
unsigned long __unused4;
#endif
size_t shm_segsz; /* size of segment (bytes) */
--
2.1.0.rc2
next prev parent reply other threads:[~2015-05-20 15:07 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-20 15:07 [PATCH 0/9] converting system calls to 64-bit time_t, part 2 Arnd Bergmann
2015-05-20 15:07 ` [PATCH 1/9] y2038: remove unneeded ipc uapi header files Arnd Bergmann
[not found] ` <1432134445-804487-2-git-send-email-arnd-r2nGTMty4D4@public.gmane.org>
2015-05-20 15:12 ` Arnd Bergmann
2015-05-20 15:07 ` [PATCH 2/9] y2038: asm-generic: extend sysvipc data structures Arnd Bergmann
2015-05-21 8:56 ` Geert Uytterhoeven
2015-05-21 14:52 ` Arnd Bergmann
2015-05-20 15:07 ` [PATCH 3/9] y2038: mips: " Arnd Bergmann
2015-05-20 15:07 ` [PATCH 4/9] y2038: x86: " Arnd Bergmann
2015-05-20 15:07 ` [PATCH 5/9] y2038: parisc: " Arnd Bergmann
2015-05-20 15:07 ` [PATCH 6/9] y2038: sparc: " Arnd Bergmann
2015-05-20 15:07 ` Arnd Bergmann [this message]
2015-05-20 15:07 ` [PATCH 8/9] y2038: xtensa: " Arnd Bergmann
2015-05-20 15:07 ` [PATCH 9/9] y2038: ipc: report long times to user space Arnd Bergmann
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