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infra: factor out atomic testing

This commit is contained in:
Thomas Schoebel-Theuer 2017-12-11 09:28:55 +01:00 committed by Thomas Schoebel-Theuer
parent b790c99d5a
commit f7e9619ab7
1 changed files with 8 additions and 2 deletions
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10
kernel/brick_say.c
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@ -135,11 +135,17 @@ static DECLARE_WAIT_QUEUE_HEAD(say_event);
bool say_dirty = false;
static
bool cannot_schedule(void)
{
return (preempt_count() & (SOFTIRQ_MASK | HARDIRQ_MASK | NMI_MASK)) != 0 || in_atomic() || irqs_disabled();
}
static
void wait_channel(struct say_channel *ch, int class)
{
if (delay_say_on_overflow && ch->ch_index[class] > SAY_BUF_LIMIT) {
bool use_atomic = (preempt_count() & (SOFTIRQ_MASK | HARDIRQ_MASK | NMI_MASK)) != 0 || in_atomic() || irqs_disabled();
bool use_atomic = cannot_schedule();
if (!use_atomic) {
say_dirty = true;
wake_up_interruptible(&say_event);
@ -352,7 +358,7 @@ struct say_channel *_make_channel(const char *name, bool must_exist)
struct say_channel *res = NULL;
struct kstat kstat = {};
int i, j;
bool use_atomic = (preempt_count() & (SOFTIRQ_MASK | HARDIRQ_MASK | NMI_MASK)) != 0 || in_atomic() || irqs_disabled();
bool use_atomic = cannot_schedule();
unsigned long mode = use_atomic ? GFP_ATOMIC : GFP_BRICK;
mm_segment_t oldfs;
bool is_dir = false;