MIPS: VDSO: Remove unused gettimeofday.c

arch/mips/vdso/gettimeofday.c has been unused since commit 24640f233b46
("mips: Add support for generic vDSO"). Remove the dead code.

Signed-off-by: Paul Burton <paul.burton@mips.com>
Fixes: 24640f233b46 ("mips: Add support for generic vDSO")
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: linux-mips@vger.kernel.org

diff --git a/arch/mips/vdso/gettimeofday.c b/arch/mips/vdso/gettimeofday.c
deleted file mode 100644 (file)
index e8243c7..0000000
--- a/arch/mips/vdso/gettimeofday.c
+++ /dev/null
@@ -1,269 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2015 Imagination Technologies
- * Author: Alex Smith <alex.smith@imgtec.com>
- */
-
-#include "vdso.h"
-
-#include <linux/compiler.h>
-#include <linux/time.h>
-
-#include <asm/clocksource.h>
-#include <asm/io.h>
-#include <asm/unistd.h>
-#include <asm/vdso.h>
-
-#ifdef CONFIG_MIPS_CLOCK_VSYSCALL
-
-static __always_inline long gettimeofday_fallback(struct timeval *_tv,
-                                         struct timezone *_tz)
-{
-       register struct timezone *tz asm("a1") = _tz;
-       register struct timeval *tv asm("a0") = _tv;
-       register long ret asm("v0");
-       register long nr asm("v0") = __NR_gettimeofday;
-       register long error asm("a3");
-
-       asm volatile(
-       "       syscall\n"
-       : "=r" (ret), "=r" (error)
-       : "r" (tv), "r" (tz), "r" (nr)
-       : "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13",
-         "$14", "$15", "$24", "$25", "hi", "lo", "memory");
-
-       return error ? -ret : ret;
-}
-
-#endif
-
-static __always_inline long clock_gettime_fallback(clockid_t _clkid,
-                                          struct timespec *_ts)
-{
-       register struct timespec *ts asm("a1") = _ts;
-       register clockid_t clkid asm("a0") = _clkid;
-       register long ret asm("v0");
-       register long nr asm("v0") = __NR_clock_gettime;
-       register long error asm("a3");
-
-       asm volatile(
-       "       syscall\n"
-       : "=r" (ret), "=r" (error)
-       : "r" (clkid), "r" (ts), "r" (nr)
-       : "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13",
-         "$14", "$15", "$24", "$25", "hi", "lo", "memory");
-
-       return error ? -ret : ret;
-}
-
-static __always_inline int do_realtime_coarse(struct timespec *ts,
-                                             const union mips_vdso_data *data)
-{
-       u32 start_seq;
-
-       do {
-               start_seq = vdso_data_read_begin(data);
-
-               ts->tv_sec = data->xtime_sec;
-               ts->tv_nsec = data->xtime_nsec >> data->cs_shift;
-       } while (vdso_data_read_retry(data, start_seq));
-
-       return 0;
-}
-
-static __always_inline int do_monotonic_coarse(struct timespec *ts,
-                                              const union mips_vdso_data *data)
-{
-       u32 start_seq;
-       u64 to_mono_sec;
-       u64 to_mono_nsec;
-
-       do {
-               start_seq = vdso_data_read_begin(data);
-
-               ts->tv_sec = data->xtime_sec;
-               ts->tv_nsec = data->xtime_nsec >> data->cs_shift;
-
-               to_mono_sec = data->wall_to_mono_sec;
-               to_mono_nsec = data->wall_to_mono_nsec;
-       } while (vdso_data_read_retry(data, start_seq));
-
-       ts->tv_sec += to_mono_sec;
-       timespec_add_ns(ts, to_mono_nsec);
-
-       return 0;
-}
-
-#ifdef CONFIG_CSRC_R4K
-
-static __always_inline u64 read_r4k_count(void)
-{
-       unsigned int count;
-
-       __asm__ __volatile__(
-       "       .set push\n"
-       "       .set mips32r2\n"
-       "       rdhwr   %0, $2\n"
-       "       .set pop\n"
-       : "=r" (count));
-
-       return count;
-}
-
-#endif
-
-#ifdef CONFIG_CLKSRC_MIPS_GIC
-
-static __always_inline u64 read_gic_count(const union mips_vdso_data *data)
-{
-       void __iomem *gic = get_gic(data);
-       u32 hi, hi2, lo;
-
-       do {
-               hi = __raw_readl(gic + sizeof(lo));
-               lo = __raw_readl(gic);
-               hi2 = __raw_readl(gic + sizeof(lo));
-       } while (hi2 != hi);
-
-       return (((u64)hi) << 32) + lo;
-}
-
-#endif
-
-static __always_inline u64 get_ns(const union mips_vdso_data *data)
-{
-       u64 cycle_now, delta, nsec;
-
-       switch (data->clock_mode) {
-#ifdef CONFIG_CSRC_R4K
-       case VDSO_CLOCK_R4K:
-               cycle_now = read_r4k_count();
-               break;
-#endif
-#ifdef CONFIG_CLKSRC_MIPS_GIC
-       case VDSO_CLOCK_GIC:
-               cycle_now = read_gic_count(data);
-               break;
-#endif
-       default:
-               return 0;
-       }
-
-       delta = (cycle_now - data->cs_cycle_last) & data->cs_mask;
-
-       nsec = (delta * data->cs_mult) + data->xtime_nsec;
-       nsec >>= data->cs_shift;
-
-       return nsec;
-}
-
-static __always_inline int do_realtime(struct timespec *ts,
-                                      const union mips_vdso_data *data)
-{
-       u32 start_seq;
-       u64 ns;
-
-       do {
-               start_seq = vdso_data_read_begin(data);
-
-               if (data->clock_mode == VDSO_CLOCK_NONE)
-                       return -ENOSYS;
-
-               ts->tv_sec = data->xtime_sec;
-               ns = get_ns(data);
-       } while (vdso_data_read_retry(data, start_seq));
-
-       ts->tv_nsec = 0;
-       timespec_add_ns(ts, ns);
-
-       return 0;
-}
-
-static __always_inline int do_monotonic(struct timespec *ts,
-                                       const union mips_vdso_data *data)
-{
-       u32 start_seq;
-       u64 ns;
-       u64 to_mono_sec;
-       u64 to_mono_nsec;
-
-       do {
-               start_seq = vdso_data_read_begin(data);
-
-               if (data->clock_mode == VDSO_CLOCK_NONE)
-                       return -ENOSYS;
-
-               ts->tv_sec = data->xtime_sec;
-               ns = get_ns(data);
-
-               to_mono_sec = data->wall_to_mono_sec;
-               to_mono_nsec = data->wall_to_mono_nsec;
-       } while (vdso_data_read_retry(data, start_seq));
-
-       ts->tv_sec += to_mono_sec;
-       ts->tv_nsec = 0;
-       timespec_add_ns(ts, ns + to_mono_nsec);
-
-       return 0;
-}
-
-#ifdef CONFIG_MIPS_CLOCK_VSYSCALL
-
-/*
- * This is behind the ifdef so that we don't provide the symbol when there's no
- * possibility of there being a usable clocksource, because there's nothing we
- * can do without it. When libc fails the symbol lookup it should fall back on
- * the standard syscall path.
- */
-int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz)
-{
-       const union mips_vdso_data *data = get_vdso_data();
-       struct timespec ts;
-       int ret;
-
-       ret = do_realtime(&ts, data);
-       if (ret)
-               return gettimeofday_fallback(tv, tz);
-
-       if (tv) {
-               tv->tv_sec = ts.tv_sec;
-               tv->tv_usec = ts.tv_nsec / 1000;
-       }
-
-       if (tz) {
-               tz->tz_minuteswest = data->tz_minuteswest;
-               tz->tz_dsttime = data->tz_dsttime;
-       }
-
-       return 0;
-}
-
-#endif /* CONFIG_MIPS_CLOCK_VSYSCALL */
-
-int __vdso_clock_gettime(clockid_t clkid, struct timespec *ts)
-{
-       const union mips_vdso_data *data = get_vdso_data();
-       int ret = -1;
-
-       switch (clkid) {
-       case CLOCK_REALTIME_COARSE:
-               ret = do_realtime_coarse(ts, data);
-               break;
-       case CLOCK_MONOTONIC_COARSE:
-               ret = do_monotonic_coarse(ts, data);
-               break;
-       case CLOCK_REALTIME:
-               ret = do_realtime(ts, data);
-               break;
-       case CLOCK_MONOTONIC:
-               ret = do_monotonic(ts, data);
-               break;
-       default:
-               break;
-       }
-
-       if (ret)
-               ret = clock_gettime_fallback(clkid, ts);
-
-       return ret;
-}