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y2038: parisc: Extend sysvipc data structures

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parisc, 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.

Unlike most architectures, parisc actually succeeded in
defining this right for big-endian CPUs, but as everyone else
got it wrong, we just use the same hack everywhere.

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>
This commit is contained in:
Arnd Bergmann
2015-05-05 23:19:43 +02:00
parent 3f3a4b3fbf
commit f69c97f6a4
4 changed files with 48 additions and 52 deletions
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33
arch/parisc/include/uapi/asm/msgbuf.h
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@@ -10,31 +10,30 @@
* between kernel and user space.
*
* Pad space is left for:
* - 64-bit time_t to solve y2038 problem
* - 2 miscellaneous 32-bit values
*/
struct msqid64_ds {
struct ipc64_perm msg_perm;
#if __BITS_PER_LONG != 64
unsigned int __pad1;
#endif
#if __BITS_PER_LONG == 64
__kernel_time_t msg_stime; /* last msgsnd time */
#if __BITS_PER_LONG != 64
unsigned int __pad2;
#endif
__kernel_time_t msg_rtime; /* last msgrcv time */
#if __BITS_PER_LONG != 64
unsigned int __pad3;
#endif
__kernel_time_t msg_ctime; /* last change time */
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 */
__kernel_pid_t msg_lspid; /* pid of last msgsnd */
__kernel_pid_t msg_lrpid; /* last receive pid */
unsigned long __unused1;
unsigned long __unused2;
#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 */
__kernel_pid_t msg_lspid; /* pid of last msgsnd */
__kernel_pid_t msg_lrpid; /* last receive pid */
unsigned long __unused1;
unsigned long __unused2;
};
#endif /* _PARISC_MSGBUF_H */