printk: Use fallthrough pseudo-keyword

Replace /* FALL THRU */ comment with the new pseudo-keyword macro
fallthrough[1].

[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20201002224627.GA30475@embeddedor

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index e4987eb..8c870ba 100644 (file)
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -1567,7 +1567,7 @@ int do_syslog(int type, char __user *buf, int len, int source)
        /* Read/clear last kernel messages */
        case SYSLOG_ACTION_READ_CLEAR:
                clear = true;
-               /* FALL THRU */
+               fallthrough;
        /* Read last kernel messages */
        case SYSLOG_ACTION_READ_ALL:
                if (!buf || len < 0)