[SERIAL]: Avoid 'statement with no effect' warnings.
When SUPPORT_SYSRQ is false, gcc can emit warnings for
the uart_handle_sysrq_char() that results. Using an
empty inline returning zero kills the warning.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index cf0f64e..9b12fe7 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -385,11 +385,11 @@
/*
* The following are helper functions for the low level drivers.
*/
-#ifdef SUPPORT_SYSRQ
static inline int
uart_handle_sysrq_char(struct uart_port *port, unsigned int ch,
struct pt_regs *regs)
{
+#ifdef SUPPORT_SYSRQ
if (port->sysrq) {
if (ch && time_before(jiffies, port->sysrq)) {
handle_sysrq(ch, regs, NULL);
@@ -398,11 +398,9 @@
}
port->sysrq = 0;
}
+#endif
return 0;
}
-#else
-#define uart_handle_sysrq_char(port,ch,regs) (0)
-#endif
/*
* We do the SysRQ and SAK checking like this...