yamt commented on code in PR #14761:
URL: https://github.com/apache/nuttx/pull/14761#discussion_r1840117002
##########
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:
spin_lock_irqsave doesn't fix the issue because serial.c uses critical
section, not spinlock.
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