y2038: x86: Extend sysvipc data structures
This extends the x86 copy of the sysvipc data structures to deal with 32-bit user space that has 64-bit time_t and wants to see timestamps beyond 2038. Fortunately, x86 has padding for this purpose in all the data structures, so we can just add extra fields. With msgid64_ds and shmid64_ds, the data structure is identical to the asm-generic version, which we have already extended. For some reason however, the 64-bit version of semid64_ds ended up with extra padding, so I'm implementing the same approach as the asm-generic version here, by using separate fields for the upper and lower halves of the two timestamps. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
@@ -8,15 +8,24 @@
|
||||
* between kernel and user space.
|
||||
*
|
||||
* Pad space is left for:
|
||||
* - 64-bit time_t to solve y2038 problem
|
||||
* - 2 miscellaneous 32-bit values
|
||||
*
|
||||
* x86_64 and x32 incorrectly added padding here, so the structures
|
||||
* are still incompatible with the padding on x86.
|
||||
*/
|
||||
struct semid64_ds {
|
||||
struct ipc64_perm sem_perm; /* permissions .. see ipc.h */
|
||||
#ifdef __i386__
|
||||
unsigned long sem_otime; /* last semop time */
|
||||
unsigned long sem_otime_high;
|
||||
unsigned long sem_ctime; /* last change time */
|
||||
unsigned long sem_ctime_high;
|
||||
#else
|
||||
__kernel_time_t sem_otime; /* last semop time */
|
||||
__kernel_ulong_t __unused1;
|
||||
__kernel_time_t sem_ctime; /* last change time */
|
||||
__kernel_ulong_t __unused2;
|
||||
#endif
|
||||
__kernel_ulong_t sem_nsems; /* no. of semaphores in array */
|
||||
__kernel_ulong_t __unused3;
|
||||
__kernel_ulong_t __unused4;
|
||||
|
Reference in New Issue
Block a user