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* [PATCH] cpufreq: s3c244x: add fallthrough comments for switch
@ 2021-09-27  9:51 Arnd Bergmann
  2021-09-27  9:55 ` Krzysztof Kozlowski
  2021-10-04  6:13 ` Viresh Kumar
  0 siblings, 2 replies; 3+ messages in thread
From: Arnd Bergmann @ 2021-09-27  9:51 UTC (permalink / raw)
  To: Krzysztof Kozlowski, Rafael J. Wysocki, Viresh Kumar
  Cc: Arnd Bergmann, linux-arm-kernel, linux-samsung-soc, linux-pm,
	linux-kernel

From: Arnd Bergmann <arnd@arndb.de>

Apparently nobody has so far caught this warning, I hit it in randconfig
build testing:

drivers/cpufreq/s3c2440-cpufreq.c: In function 's3c2440_cpufreq_setdivs':
drivers/cpufreq/s3c2440-cpufreq.c:175:10: error: this statement may fall through [-Werror=implicit-fallthrough=]
   camdiv |= S3C2440_CAMDIVN_HCLK3_HALF;
          ^
drivers/cpufreq/s3c2440-cpufreq.c:176:2: note: here
  case 3:
  ^~~~
drivers/cpufreq/s3c2440-cpufreq.c:181:10: error: this statement may fall through [-Werror=implicit-fallthrough=]
   camdiv |= S3C2440_CAMDIVN_HCLK4_HALF;
          ^
drivers/cpufreq/s3c2440-cpufreq.c:182:2: note: here
  case 4:
  ^~~~

Both look like the fallthrough is intentional, so add the new
"fallthrough;" keyword.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/cpufreq/s3c2440-cpufreq.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/cpufreq/s3c2440-cpufreq.c b/drivers/cpufreq/s3c2440-cpufreq.c
index 148e8aedefa9..2011fb9c03a4 100644
--- a/drivers/cpufreq/s3c2440-cpufreq.c
+++ b/drivers/cpufreq/s3c2440-cpufreq.c
@@ -173,12 +173,14 @@ static void s3c2440_cpufreq_setdivs(struct s3c_cpufreq_config *cfg)
 
 	case 6:
 		camdiv |= S3C2440_CAMDIVN_HCLK3_HALF;
+		fallthrough;
 	case 3:
 		clkdiv |= S3C2440_CLKDIVN_HDIVN_3_6;
 		break;
 
 	case 8:
 		camdiv |= S3C2440_CAMDIVN_HCLK4_HALF;
+		fallthrough;
 	case 4:
 		clkdiv |= S3C2440_CLKDIVN_HDIVN_4_8;
 		break;
-- 
2.29.2


^ permalink raw reply	[flat|nested] 3+ messages in thread

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2021-09-27  9:51 [PATCH] cpufreq: s3c244x: add fallthrough comments for switch Arnd Bergmann
2021-09-27  9:55 ` Krzysztof Kozlowski
2021-10-04  6:13 ` Viresh Kumar

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