hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

stop_machine: remove try_stop_cpus helper 

try_stop_cpus is not used after this:

commit c190c3b16c ("rcu: Switch synchronize_sched_expedited() to
stop_one_cpu()")

So remove it.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20191214195107.26480-1-tiny.windzz@gmail.com
This commit is contained in:
Yangtao Li 2019-12-14 19:51:07 +00:00 committed by Peter Zijlstra
parent d040e0734f
commit a5e37de90e
2 changed files with 0 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
include/linux/stop_machine.h
View File

@ -33,7 +33,6 @@ int stop_two_cpus(unsigned int cpu1, unsigned int cpu2, cpu_stop_fn_t fn, void *
bool stop_one_cpu_nowait(unsigned int cpu, cpu_stop_fn_t fn, void *arg, bool stop_one_cpu_nowait(unsigned int cpu, cpu_stop_fn_t fn, void *arg,
struct cpu_stop_work *work_buf); struct cpu_stop_work *work_buf);
int stop_cpus(const struct cpumask *cpumask, cpu_stop_fn_t fn, void *arg); int stop_cpus(const struct cpumask *cpumask, cpu_stop_fn_t fn, void *arg);
int try_stop_cpus(const struct cpumask *cpumask, cpu_stop_fn_t fn, void *arg);
void stop_machine_park(int cpu); void stop_machine_park(int cpu);
void stop_machine_unpark(int cpu); void stop_machine_unpark(int cpu);
void stop_machine_yield(const struct cpumask *cpumask); void stop_machine_yield(const struct cpumask *cpumask);
@ -90,12 +89,6 @@ static inline int stop_cpus(const struct cpumask *cpumask,
return -ENOENT; return -ENOENT;
} }
static inline int try_stop_cpus(const struct cpumask *cpumask,
cpu_stop_fn_t fn, void *arg)
{
return stop_cpus(cpumask, fn, arg);
}
#endif /* CONFIG_SMP */ #endif /* CONFIG_SMP */
/* /*

30
kernel/stop_machine.c
View File

@ -453,36 +453,6 @@ int stop_cpus(const struct cpumask *cpumask, cpu_stop_fn_t fn, void *arg)
return ret; return ret;
} }
/**
* try_stop_cpus - try to stop multiple cpus
* @cpumask: cpus to stop
* @fn: function to execute
* @arg: argument to @fn
*
* Identical to stop_cpus() except that it fails with -EAGAIN if
* someone else is already using the facility.
*
* CONTEXT:
* Might sleep.
*
* RETURNS:
* -EAGAIN if someone else is already stopping cpus, -ENOENT if
* @fn(@arg) was not executed at all because all cpus in @cpumask were
* offline; otherwise, 0 if all executions of @fn returned 0, any non
* zero return value if any returned non zero.
*/
int try_stop_cpus(const struct cpumask *cpumask, cpu_stop_fn_t fn, void *arg)
{
int ret;
/* static works are used, process one request at a time */
if (!mutex_trylock(&stop_cpus_mutex))
return -EAGAIN;
ret = __stop_cpus(cpumask, fn, arg);
mutex_unlock(&stop_cpus_mutex);
return ret;
}
static int cpu_stop_should_run(unsigned int cpu) static int cpu_stop_should_run(unsigned int cpu)
{ {
struct cpu_stopper *stopper = &per_cpu(cpu_stopper, cpu); struct cpu_stopper *stopper = &per_cpu(cpu_stopper, cpu);