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Subject[RFC/RFT patch 6/7] hrtimer: Conflate clock MONOTONIC and BOOTTIME
Now that clock MONOTONIC and BOOTTIME are indentical remove all the special
casing. The user space visible interfaces still support both clocks.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
include/linux/hrtimer.h | 2 --
kernel/time/hrtimer.c | 16 ++--------------
kernel/time/timekeeping.c | 4 +---
kernel/time/timekeeping.h | 1 -
4 files changed, 3 insertions(+), 20 deletions(-)

--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -161,11 +161,9 @@ struct hrtimer_clock_base {
enum hrtimer_base_type {
HRTIMER_BASE_MONOTONIC,
HRTIMER_BASE_REALTIME,
- HRTIMER_BASE_BOOTTIME,
HRTIMER_BASE_TAI,
HRTIMER_BASE_MONOTONIC_SOFT,
HRTIMER_BASE_REALTIME_SOFT,
- HRTIMER_BASE_BOOTTIME_SOFT,
HRTIMER_BASE_TAI_SOFT,
HRTIMER_MAX_CLOCK_BASES,
};
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -91,11 +91,6 @@ DEFINE_PER_CPU(struct hrtimer_cpu_base,
.get_time = &ktime_get_real,
},
{
- .index = HRTIMER_BASE_BOOTTIME,
- .clockid = CLOCK_BOOTTIME,
- .get_time = &ktime_get_boottime,
- },
- {
.index = HRTIMER_BASE_TAI,
.clockid = CLOCK_TAI,
.get_time = &ktime_get_clocktai,
@@ -111,11 +106,6 @@ DEFINE_PER_CPU(struct hrtimer_cpu_base,
.get_time = &ktime_get_real,
},
{
- .index = HRTIMER_BASE_BOOTTIME_SOFT,
- .clockid = CLOCK_BOOTTIME,
- .get_time = &ktime_get_boottime,
- },
- {
.index = HRTIMER_BASE_TAI_SOFT,
.clockid = CLOCK_TAI,
.get_time = &ktime_get_clocktai,
@@ -129,7 +119,7 @@ static const int hrtimer_clock_to_base_t

[CLOCK_REALTIME] = HRTIMER_BASE_REALTIME,
[CLOCK_MONOTONIC] = HRTIMER_BASE_MONOTONIC,
- [CLOCK_BOOTTIME] = HRTIMER_BASE_BOOTTIME,
+ [CLOCK_BOOTTIME] = HRTIMER_BASE_MONOTONIC,
[CLOCK_TAI] = HRTIMER_BASE_TAI,
};

@@ -565,14 +555,12 @@ static ktime_t
static inline ktime_t hrtimer_update_base(struct hrtimer_cpu_base *base)
{
ktime_t *offs_real = &base->clock_base[HRTIMER_BASE_REALTIME].offset;
- ktime_t *offs_boot = &base->clock_base[HRTIMER_BASE_BOOTTIME].offset;
ktime_t *offs_tai = &base->clock_base[HRTIMER_BASE_TAI].offset;

ktime_t now = ktime_get_update_offsets_now(&base->clock_was_set_seq,
- offs_real, offs_boot, offs_tai);
+ offs_real, offs_tai);

base->clock_base[HRTIMER_BASE_REALTIME_SOFT].offset = *offs_real;
- base->clock_base[HRTIMER_BASE_BOOTTIME_SOFT].offset = *offs_boot;
base->clock_base[HRTIMER_BASE_TAI_SOFT].offset = *offs_tai;

return now;
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -2242,7 +2242,6 @@ void do_timer(unsigned long ticks)
* ktime_get_update_offsets_now - hrtimer helper
* @cwsseq: pointer to check and store the clock was set sequence number
* @offs_real: pointer to storage for monotonic -> realtime offset
- * @offs_boot: pointer to storage for monotonic -> boottime offset
* @offs_tai: pointer to storage for monotonic -> clock tai offset
*
* Returns current monotonic time and updates the offsets if the
@@ -2252,7 +2251,7 @@ void do_timer(unsigned long ticks)
* Called from hrtimer_interrupt() or retrigger_next_event()
*/
ktime_t ktime_get_update_offsets_now(unsigned int *cwsseq, ktime_t *offs_real,
- ktime_t *offs_boot, ktime_t *offs_tai)
+ ktime_t *offs_tai)
{
struct timekeeper *tk = &tk_core.timekeeper;
unsigned int seq;
@@ -2269,7 +2268,6 @@ ktime_t ktime_get_update_offsets_now(uns
if (*cwsseq != tk->clock_was_set_seq) {
*cwsseq = tk->clock_was_set_seq;
*offs_real = tk->offs_real;
- *offs_boot = tk->offs_boot;
*offs_tai = tk->offs_tai;
}

--- a/kernel/time/timekeeping.h
+++ b/kernel/time/timekeeping.h
@@ -6,7 +6,6 @@
*/
extern ktime_t ktime_get_update_offsets_now(unsigned int *cwsseq,
ktime_t *offs_real,
- ktime_t *offs_boot,
ktime_t *offs_tai);

extern int timekeeping_valid_for_hres(void);

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