yamt commented on code in PR #14761:
URL: https://github.com/apache/nuttx/pull/14761#discussion_r1840331675
##########
drivers/syslog/syslog_channel.c:
##########
@@ -234,23 +229,31 @@ g_syslog_channel[CONFIG_SYSLOG_MAX_CHANNELS] =
#ifdef CONFIG_SYSLOG_DEFAULT
static int syslog_default_putc(FAR syslog_channel_t *channel, int ch)
{
- UNUSED(channel);
-
# ifdef CONFIG_ARCH_LOWPUTC
+ /* See https://github.com/apache/nuttx/issues/14662
+ * about what this critical section is for.
+ */
+
+ irqstate_t flags = enter_critical_section();
up_putc(ch);
+ leave_critical_section(flags);
Review Comment:
> Should serial.c use a spinlock / spin_lock_irqsave ? I cannot imagine why
the big kernel lock (enter/exit_critical) needs to be invoked there (although I
have not looked at the driver itself).
because we don't have a spinlock-interlocked blocking api? (do we?)
> if CONFIG_SPINLOCK = 0, then spin_lock_irqsave reverts back to a local
interrupt disable. Should work ?
i'm not sure what you mean here. is it about this PR?
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