linux-kernel - [PATCH] mtd: phram: Mark expected switch fall-throughs

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Date:   Fri, 8 Feb 2019 12:09:11 -0600
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Joern Engel <joern@...ybastard.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Boris Brezillon <bbrezillon@...nel.org>,
        Marek Vasut <marek.vasut@...il.com>,
        Richard Weinberger <richard@....at>
Cc:     linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Subject: [PATCH] mtd: phram: Mark expected switch fall-throughs

In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

This patch fixes the following warnings:

drivers/mtd/devices/phram.c: In function ‘parse_num64’:
drivers/mtd/devices/phram.c:149:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
     shift += 10;
     ~~~~~~^~~~~
drivers/mtd/devices/phram.c:150:4: note: here
    case 'M':
    ^~~~
drivers/mtd/devices/phram.c:151:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
     shift += 10;
     ~~~~~~^~~~~
drivers/mtd/devices/phram.c:152:4: note: here
    case 'k':
    ^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enabling
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
---
 drivers/mtd/devices/phram.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mtd/devices/phram.c b/drivers/mtd/devices/phram.c
index 9ee04b5f9311..8a8627c30aed 100644
--- a/drivers/mtd/devices/phram.c
+++ b/drivers/mtd/devices/phram.c
@@ -147,8 +147,10 @@ static int parse_num64(uint64_t *num64, char *token)
 			switch (token[len - 2]) {
 			case 'G':
 				shift += 10;
+				/* fall through */
 			case 'M':
 				shift += 10;
+				/* fall through */
 			case 'k':
 				shift += 10;
 				token[len - 2] = 0;
-- 
2.20.1