treewide: Use fallthrough pseudo-keyword
Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary fall-through markings when it is the case. [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>
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@@ -602,7 +602,7 @@ static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
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case TCOFLUSH:
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flush_tx_queue(tty);
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}
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/* fall through - to default */
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fallthrough; /* to default */
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default:
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error = n_tty_ioctl_helper(tty, file, cmd, arg);
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