[PATCH 5/5] powerpc: remove unused to_tm() helper

From: Arnd Bergmann
Date: Mon Apr 23 2018 - 04:38:42 EST


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@xxxxxxxx>
---
arch/powerpc/include/asm/time.h | 2 --
arch/powerpc/kernel/time.c | 50 ---------------------------------------
arch/powerpc/platforms/ps3/time.c | 24 -------------------
3 files changed, 76 deletions(-)

diff --git a/arch/powerpc/include/asm/time.h b/arch/powerpc/include/asm/time.h
index db546c034905..79bc9c3e4325 100644
--- a/arch/powerpc/include/asm/time.h
+++ b/arch/powerpc/include/asm/time.h
@@ -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 tick_broadcast_ipi_handler(void);

extern void generic_calibrate_decr(void);
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index f9b0baa3fa2b..79bdeea85ab4 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -1138,56 +1138,6 @@ 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.
diff --git a/arch/powerpc/platforms/ps3/time.c b/arch/powerpc/platforms/ps3/time.c
index 9dac125c997e..08ca76e23d09 100644
--- a/arch/powerpc/platforms/ps3/time.c
+++ b/arch/powerpc/platforms/ps3/time.c
@@ -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;
--
2.9.0