y2038: remove struct definition redirects

We now use 64-bit time_t on all architectures, so the __kernel_timex,
__kernel_timeval and __kernel_timespec redirects can be removed
after having served their purpose.

This makes it all much less confusing, as the __kernel_* types
now always refer to the same layout based on 64-bit time_t across
all 32-bit and 64-bit architectures.

Signed-off-by: Arnd Bergmann <[e-mail]>

include/linux/time64.h

···
 typedef __s64 time64_t;
 typedef __u64 timeu64_t;
 
-/* CONFIG_64BIT_TIME enables new 64 bit time_t syscalls in the compat path
- * and 32-bit emulation.
- */
-#ifndef CONFIG_64BIT_TIME
-#define __kernel_timespec timespec
-#define __kernel_itimerspec itimerspec
-#endif
-
 #include <uapi/linux/time.h>
 
 struct timespec64 {

include/linux/timex.h

···
 #ifndef _LINUX_TIMEX_H
 #define _LINUX_TIMEX_H
 
-/* CONFIG_64BIT_TIME enables new 64 bit time_t syscalls in the compat path
- * and 32-bit emulation.
- */
-#ifndef CONFIG_64BIT_TIME
-#define __kernel_timex timex
-#endif
-
 #include <uapi/linux/timex.h>
 
 #define ADJ_ADJTIME		0x8000	/* switch between adjtime/adjtimex modes */

include/uapi/linux/time.h

···
 	struct timeval it_value;	/* current value */
 };
 
-#ifndef __kernel_timespec
 struct __kernel_timespec {
 	__kernel_time64_t       tv_sec;                 /* seconds */
 	long long               tv_nsec;                /* nanoseconds */
 };
-#endif
 
-#ifndef __kernel_itimerspec
 struct __kernel_itimerspec {
 	struct __kernel_timespec it_interval;    /* timer period */
 	struct __kernel_timespec it_value;       /* timer expiration */
 };
-#endif
 
 /*
  * legacy timeval structure, only embedded in structures that

include/uapi/linux/timex.h

···
 	long long		tv_usec;
 };
 
-#ifndef __kernel_timex
 struct __kernel_timex {
 	unsigned int modes;	/* mode selector */
 	int :32;            /* pad */
···
 	int  :32; int  :32; int  :32; int  :32;
 	int  :32; int  :32; int  :32;
 };
-#endif
 
 /*
  * Mode codes (timex.mode)