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Merge branch 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu

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Pull percpu consistent-ops changes from Tejun Heo:
 "Way back, before the current percpu allocator was implemented, static
  and dynamic percpu memory areas were allocated and handled separately
  and had their own accessors.  The distinction has been gone for many
  years now; however, the now duplicate two sets of accessors remained
  with the pointer based ones - this_cpu_*() - evolving various other
  operations over time.  During the process, we also accumulated other
  inconsistent operations.

  This pull request contains Christoph's patches to clean up the
  duplicate accessor situation.  __get_cpu_var() uses are replaced with
  with this_cpu_ptr() and __this_cpu_ptr() with raw_cpu_ptr().

  Unfortunately, the former sometimes is tricky thanks to C being a bit
  messy with the distinction between lvalues and pointers, which led to
  a rather ugly solution for cpumask_var_t involving the introduction of
  this_cpu_cpumask_var_ptr().

  This converts most of the uses but not all.  Christoph will follow up
  with the remaining conversions in this merge window and hopefully
  remove the obsolete accessors"

* 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: (38 commits)
  irqchip: Properly fetch the per cpu offset
  percpu: Resolve ambiguities in __get_cpu_var/cpumask_var_t -fix
  ia64: sn_nodepda cannot be assigned to after this_cpu conversion. Use __this_cpu_write.
  percpu: Resolve ambiguities in __get_cpu_var/cpumask_var_t
  Revert "powerpc: Replace __get_cpu_var uses"
  percpu: Remove __this_cpu_ptr
  clocksource: Replace __this_cpu_ptr with raw_cpu_ptr
  sparc: Replace __get_cpu_var uses
  avr32: Replace __get_cpu_var with __this_cpu_write
  blackfin: Replace __get_cpu_var uses
  tile: Use this_cpu_ptr() for hardware counters
  tile: Replace __get_cpu_var uses
  powerpc: Replace __get_cpu_var uses
  alpha: Replace __get_cpu_var
  ia64: Replace __get_cpu_var uses
  s390: cio driver &__get_cpu_var replacements
  s390: Replace __get_cpu_var uses
  mips: Replace __get_cpu_var uses
  MIPS: Replace __get_cpu_var uses in FPU emulator.
  arm: Replace __this_cpu_ptr with raw_cpu_ptr
  ...
This commit is contained in:
Linus Torvalds
2014-10-15 07:48:18 +02:00
parent 6929c35897 513d1a2884
commit 0429fbc0bd
149 changed files with 560 additions and 547 deletions
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24
kernel/time/tick-sched.c
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@@ -205,7 +205,7 @@ static void tick_nohz_restart_sched_tick(struct tick_sched *ts, ktime_t now);
*/
void __tick_nohz_full_check(void)
{
struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
if (tick_nohz_full_cpu(smp_processor_id())) {
if (ts->tick_stopped && !is_idle_task(current)) {
@@ -573,7 +573,7 @@ static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts,
unsigned long seq, last_jiffies, next_jiffies, delta_jiffies;
ktime_t last_update, expires, ret = { .tv64 = 0 };
unsigned long rcu_delta_jiffies;
struct clock_event_device *dev = __get_cpu_var(tick_cpu_device).evtdev;
struct clock_event_device *dev = __this_cpu_read(tick_cpu_device.evtdev);
u64 time_delta;
time_delta = timekeeping_max_deferment();
@@ -841,7 +841,7 @@ void tick_nohz_idle_enter(void)
local_irq_disable();
ts = &__get_cpu_var(tick_cpu_sched);
ts = this_cpu_ptr(&tick_cpu_sched);
ts->inidle = 1;
__tick_nohz_idle_enter(ts);
@@ -859,7 +859,7 @@ EXPORT_SYMBOL_GPL(tick_nohz_idle_enter);
*/
void tick_nohz_irq_exit(void)
{
struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
if (ts->inidle)
__tick_nohz_idle_enter(ts);
@@ -874,7 +874,7 @@ void tick_nohz_irq_exit(void)
*/
ktime_t tick_nohz_get_sleep_length(void)
{
struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
return ts->sleep_length;
}
@@ -952,7 +952,7 @@ static void tick_nohz_account_idle_ticks(struct tick_sched *ts)
*/
void tick_nohz_idle_exit(void)
{
struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
ktime_t now;
local_irq_disable();
@@ -987,7 +987,7 @@ static int tick_nohz_reprogram(struct tick_sched *ts, ktime_t now)
*/
static void tick_nohz_handler(struct clock_event_device *dev)
{
struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
struct pt_regs *regs = get_irq_regs();
ktime_t now = ktime_get();
@@ -1011,7 +1011,7 @@ static void tick_nohz_handler(struct clock_event_device *dev)
*/
static void tick_nohz_switch_to_nohz(void)
{
struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
ktime_t next;
if (!tick_nohz_enabled)
@@ -1073,7 +1073,7 @@ static void tick_nohz_kick_tick(struct tick_sched *ts, ktime_t now)
static inline void tick_nohz_irq_enter(void)
{
struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
ktime_t now;
if (!ts->idle_active && !ts->tick_stopped)
@@ -1151,7 +1151,7 @@ early_param("skew_tick", skew_tick);
*/
void tick_setup_sched_timer(void)
{
struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
ktime_t now = ktime_get();
/*
@@ -1220,7 +1220,7 @@ void tick_clock_notify(void)
*/
void tick_oneshot_notify(void)
{
struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
set_bit(0, &ts->check_clocks);
}
@@ -1235,7 +1235,7 @@ void tick_oneshot_notify(void)
*/
int tick_check_oneshot_change(int allow_nohz)
{
struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
if (!test_and_clear_bit(0, &ts->check_clocks))
return 0;