Commit 83335eb4 authored by Arnd Bergmann's avatar Arnd Bergmann
Browse files

y2038: arm64: Extend sysvipc compat data structures 



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: default avatarArnd Bergmann <arnd@arndb.de>
parent 26293b31

arch/arm64/include/asm/compat.h

+16 −16
Original line number Diff line number Diff line
@@ -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;

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