linux-kernel - [PATCH v1 3/3] bug: use bool for __ret_warn_on in WARN/WARN

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Date:   Sat,  4 Mar 2023 12:19:32 +0800
From:   Wei Wang <wei.w.wang@...el.com>
To:     arnd@...db.de, akpm@...ux-foundation.org, keescook@...omium.org,
        herbert@...dor.apana.org.au, josh@...htriplett.org,
        jani.nikula@...el.com, corbet@....net, jgg@...lanox.com,
        dmatlack@...gle.com, mizhang@...gle.com, pbonzini@...hat.com,
        seanjc@...gle.com
Cc:     linux-kernel@...r.kernel.org, Wei Wang <wei.w.wang@...el.com>
Subject: [PATCH v1 3/3] bug: use bool for __ret_warn_on in WARN/WARN_ON

coding-style.rst documents below:
bool function return types and stack variables are always fine to use
whenever appropriate. Use of bool is encouraged to improve readability
and is often a better option than 'int' for storing boolean values.

__ret_warn_on is essentially used as boolean in WARN/WARN_ON, so change
its definition from 'int' to 'bool'.

Signed-off-by: Wei Wang <wei.w.wang@...el.com>
---
 include/asm-generic/bug.h | 12 ++++++------
 tools/include/asm/bug.h   | 10 +++++-----
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h
index 4050b191e1a9..3a316be73f0e 100644
--- a/include/asm-generic/bug.h
+++ b/include/asm-generic/bug.h
@@ -107,7 +107,7 @@ extern __printf(1, 2) void __warn_printk(const char *fmt, ...);
 		instrumentation_end();					\
 	} while (0)
 #define WARN_ON_ONCE(condition) ({				\
-	int __ret_warn_on = !!(condition);			\
+	bool __ret_warn_on = !!(condition);			\
 	if (unlikely(__ret_warn_on))				\
 		__WARN_FLAGS(BUGFLAG_ONCE |			\
 			     BUGFLAG_TAINT(TAINT_WARN));	\
@@ -119,7 +119,7 @@ extern __printf(1, 2) void __warn_printk(const char *fmt, ...);
 
 #ifndef WARN_ON
 #define WARN_ON(condition) ({						\
-	int __ret_warn_on = !!(condition);				\
+	bool __ret_warn_on = !!(condition);				\
 	if (unlikely(__ret_warn_on))					\
 		__WARN();						\
 	unlikely(__ret_warn_on);					\
@@ -128,7 +128,7 @@ extern __printf(1, 2) void __warn_printk(const char *fmt, ...);
 
 #ifndef WARN
 #define WARN(condition, format...) ({					\
-	int __ret_warn_on = !!(condition);				\
+	bool __ret_warn_on = !!(condition);				\
 	if (unlikely(__ret_warn_on))					\
 		__WARN_printf(TAINT_WARN, format);			\
 	unlikely(__ret_warn_on);					\
@@ -136,7 +136,7 @@ extern __printf(1, 2) void __warn_printk(const char *fmt, ...);
 #endif
 
 #define WARN_TAINT(condition, taint, format...) ({			\
-	int __ret_warn_on = !!(condition);				\
+	bool __ret_warn_on = !!(condition);				\
 	if (unlikely(__ret_warn_on))					\
 		__WARN_printf(taint, format);				\
 	unlikely(__ret_warn_on);					\
@@ -164,14 +164,14 @@ extern __printf(1, 2) void __warn_printk(const char *fmt, ...);
 
 #ifndef HAVE_ARCH_WARN_ON
 #define WARN_ON(condition) ({						\
-	int __ret_warn_on = !!(condition);				\
+	bool __ret_warn_on = !!(condition);				\
 	unlikely(__ret_warn_on);					\
 })
 #endif
 
 #ifndef WARN
 #define WARN(condition, format...) ({					\
-	int __ret_warn_on = !!(condition);				\
+	bool __ret_warn_on = !!(condition);				\
 	no_printk(format);						\
 	unlikely(__ret_warn_on);					\
 })
diff --git a/tools/include/asm/bug.h b/tools/include/asm/bug.h
index 550223f0a6e6..c1f72071303b 100644
--- a/tools/include/asm/bug.h
+++ b/tools/include/asm/bug.h
@@ -8,14 +8,14 @@
 #define __WARN_printf(arg...)	do { fprintf(stderr, arg); } while (0)
 
 #define WARN(condition, format...) ({		\
-	int __ret_warn_on = !!(condition);	\
+	bool __ret_warn_on = !!(condition);	\
 	if (unlikely(__ret_warn_on))		\
 		__WARN_printf(format);		\
 	unlikely(__ret_warn_on);		\
 })
 
 #define WARN_ON(condition) ({					\
-	int __ret_warn_on = !!(condition);			\
+	bool __ret_warn_on = !!(condition);			\
 	if (unlikely(__ret_warn_on))				\
 		__WARN_printf("assertion failed at %s:%d\n",	\
 				__FILE__, __LINE__);		\
@@ -23,8 +23,8 @@
 })
 
 #define WARN_ON_ONCE(condition) ({			\
-	static int __warned;				\
-	int __ret_warn_once = !!(condition);		\
+	static bool __warned;				\
+	bool __ret_warn_once = !!(condition);		\
 							\
 	if (unlikely(__ret_warn_once && !__warned)) {	\
 		__warned = true;			\
@@ -35,7 +35,7 @@
 
 #define WARN_ONCE(condition, format...)	({	\
 	static int __warned;			\
-	int __ret_warn_once = !!(condition);	\
+	bool __ret_warn_once = !!(condition);	\
 						\
 	if (unlikely(__ret_warn_once))		\
 		if (WARN(!__warned, format)) 	\
-- 
2.27.0