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powerpc: remove unused to_tm() helper 

to_tm() is now completely unused, the only reference being in the
_dump_time() helper that is also unused. This removes both, leaving
the rest of the powerpc RTC code y2038 safe to as far as the hardware
supports.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Arnd Bergmann 2018-04-23 10:36:42 +02:00 committed by Michael Ellerman
parent 5235afa89a
commit 34efabe418
3 changed files with 0 additions and 76 deletions
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2
arch/powerpc/include/asm/time.h
View File

@ -26,8 +26,6 @@ extern unsigned long tb_ticks_per_usec;
extern unsigned long tb_ticks_per_sec;
extern struct clock_event_device decrementer_clockevent;
struct rtc_time;
extern void to_tm(int tim, struct rtc_time * tm);
extern void generic_calibrate_decr(void);
extern void hdec_interrupt(struct pt_regs *regs);

50
arch/powerpc/kernel/time.c
View File

@ -1159,56 +1159,6 @@ void __init time_init(void)
#endif
}
#define FEBRUARY 2
#define STARTOFTIME 1970
#define SECDAY 86400L
#define SECYR (SECDAY * 365)
#define leapyear(year) ((year) % 4 == 0 && \
((year) % 100 != 0 || (year) % 400 == 0))
#define days_in_year(a) (leapyear(a) ? 366 : 365)
#define days_in_month(a) (month_days[(a) - 1])
static int month_days[12] = {
31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
};
void to_tm(int tim, struct rtc_time * tm)
{
register int i;
register long hms, day;
day = tim / SECDAY;
hms = tim % SECDAY;
/* Hours, minutes, seconds are easy */
tm->tm_hour = hms / 3600;
tm->tm_min = (hms % 3600) / 60;
tm->tm_sec = (hms % 3600) % 60;
/* Number of years in days */
for (i = STARTOFTIME; day >= days_in_year(i); i++)
day -= days_in_year(i);
tm->tm_year = i;
/* Number of months in days left */
if (leapyear(tm->tm_year))
days_in_month(FEBRUARY) = 29;
for (i = 1; day >= days_in_month(i); i++)
day -= days_in_month(i);
days_in_month(FEBRUARY) = 28;
tm->tm_mon = i;
/* Days are what is left over (+1) from all that. */
tm->tm_mday = day + 1;
/*
* No-one uses the day of the week.
*/
tm->tm_wday = -1;
}
EXPORT_SYMBOL(to_tm);
/*
* Divide a 128-bit dividend by a 32-bit divisor, leaving a 128 bit
* result.

24
arch/powerpc/platforms/ps3/time.c
View File

@ -28,30 +28,6 @@
#include "platform.h"
#define dump_tm(_a) _dump_tm(_a, __func__, __LINE__)
static void _dump_tm(const struct rtc_time *tm, const char* func, int line)
{
pr_debug("%s:%d tm_sec %d\n", func, line, tm->tm_sec);
pr_debug("%s:%d tm_min %d\n", func, line, tm->tm_min);
pr_debug("%s:%d tm_hour %d\n", func, line, tm->tm_hour);
pr_debug("%s:%d tm_mday %d\n", func, line, tm->tm_mday);
pr_debug("%s:%d tm_mon %d\n", func, line, tm->tm_mon);
pr_debug("%s:%d tm_year %d\n", func, line, tm->tm_year);
pr_debug("%s:%d tm_wday %d\n", func, line, tm->tm_wday);
}
#define dump_time(_a) _dump_time(_a, __func__, __LINE__)
static void __maybe_unused _dump_time(int time, const char *func,
int line)
{
struct rtc_time tm;
to_tm(time, &tm);
pr_debug("%s:%d time %d\n", func, line, time);
_dump_tm(&tm, func, line);
}
void __init ps3_calibrate_decr(void)
{
int result;