ich777/linux_media
1
0
Fork 0
mirror of https://github.com/tbsdtv/linux_media.git synced 2025-07-23 12:43:29 +02:00
Code Issues Packages Projects Releases Wiki Activity

smp: Inline on_each_cpu_cond() and on_each_cpu()

Browse Source 
Simplify the code and avoid having an additional function on the stack
by inlining on_each_cpu_cond() and on_each_cpu().

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Nadav Amit <namit@vmware.com>
[ Minor edits. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20210220231712.2475218-10-namit@vmware.com
This commit is contained in:
Nadav Amit
2021-02-20 15:17:12 -08:00
committed by Ingo Molnar
parent 1608e4cf31
commit a5aa5ce300
3 changed files with 43 additions and 113 deletions
Download Patch File Download Diff File Expand all files Collapse all files

56
kernel/smp.c
View File

@@ -847,55 +847,6 @@ void __init smp_init(void)
smp_cpus_done(setup_max_cpus);
}
/*
* Call a function on all processors. May be used during early boot while
* early_boot_irqs_disabled is set. Use local_irq_save/restore() instead
* of local_irq_disable/enable().
*/
void on_each_cpu(smp_call_func_t func, void *info, int wait)
{
unsigned long flags;
preempt_disable();
smp_call_function(func, info, wait);
local_irq_save(flags);
func(info);
local_irq_restore(flags);
preempt_enable();
}
EXPORT_SYMBOL(on_each_cpu);
/**
* on_each_cpu_mask(): Run a function on processors specified by
* cpumask, which may include the local processor.
* @mask: The set of cpus to run on (only runs on online subset).
* @func: The function to run. This must be fast and non-blocking.
* @info: An arbitrary pointer to pass to the function.
* @wait: If true, wait (atomically) until function has completed
* on other CPUs.
*
* If @wait is true, then returns once @func has returned.
*
* You must not call this function with disabled interrupts or from a
* hardware interrupt handler or from a bottom half handler. The
* exception is that it may be used during early boot while
* early_boot_irqs_disabled is set.
*/
void on_each_cpu_mask(const struct cpumask *mask, smp_call_func_t func,
void *info, bool wait)
{
unsigned int scf_flags;
scf_flags = SCF_RUN_LOCAL;
if (wait)
scf_flags |= SCF_WAIT;
preempt_disable();
smp_call_function_many_cond(mask, func, info, scf_flags, NULL);
preempt_enable();
}
EXPORT_SYMBOL(on_each_cpu_mask);
/*
* on_each_cpu_cond(): Call a function on each processor for which
* the supplied function cond_func returns true, optionally waiting
@@ -932,13 +883,6 @@ void on_each_cpu_cond_mask(smp_cond_func_t cond_func, smp_call_func_t func,
}
EXPORT_SYMBOL(on_each_cpu_cond_mask);
void on_each_cpu_cond(smp_cond_func_t cond_func, smp_call_func_t func,
void *info, bool wait)
{
on_each_cpu_cond_mask(cond_func, func, info, wait, cpu_online_mask);
}
EXPORT_SYMBOL(on_each_cpu_cond);
static void do_nothing(void *unused)
{
}