linux-kernel - [PATCH] fault-inject: Declare the second argument of setup_fault

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Date:   Thu,  8 Jul 2021 11:34:26 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Akinobu Mita <akinobu.mita@...il.com>
Cc:     linux-kernel@...r.kernel.org, Jaegeuk Kim <jaegeuk@...nel.org>,
        Bart Van Assche <bvanassche@....org>
Subject: [PATCH] fault-inject: Declare the second argument of setup_fault_attr() const

This patch makes it possible to pass a const char * argument to
setup_fault_attr() without having to cast away constness.

Cc: Akinobu Mita <akinobu.mita@...il.com>
Signed-off-by: Bart Van Assche <bvanassche@....org>
---
 include/linux/fault-inject.h | 2 +-
 lib/fault-inject.c           | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/fault-inject.h b/include/linux/fault-inject.h
index e525f6957c49..afc649f0102b 100644
--- a/include/linux/fault-inject.h
+++ b/include/linux/fault-inject.h
@@ -42,7 +42,7 @@ struct fault_attr {
 	}
 
 #define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER
-int setup_fault_attr(struct fault_attr *attr, char *str);
+int setup_fault_attr(struct fault_attr *attr, const char *str);
 bool should_fail(struct fault_attr *attr, ssize_t size);
 
 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
diff --git a/lib/fault-inject.c b/lib/fault-inject.c
index ce12621b4275..45520151b32d 100644
--- a/lib/fault-inject.c
+++ b/lib/fault-inject.c
@@ -15,7 +15,7 @@
  * setup_fault_attr() is a helper function for various __setup handlers, so it
  * returns 0 on error, because that is what __setup handlers do.
  */
-int setup_fault_attr(struct fault_attr *attr, char *str)
+int setup_fault_attr(struct fault_attr *attr, const char *str)
 {
 	unsigned long probability;
 	unsigned long interval;