linux-kernel - [PATCH 5/5] params: improve standard definitions

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Date:	Sat, 16 Nov 2013 11:32:31 -0600
From:	Felipe Contreras <felipe.contreras@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Rusty Russell <rusty@...tcorp.com.au>, Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Levente Kurusa <levex@...ux.com>,
	Felipe Contreras <felipe.contreras@...il.com>
Subject: [PATCH 5/5] params: improve standard definitions

We are repeating the functionality of kstrtol in param_set_long, and the
same for kstrtoint. We can get rid of the extra code by using the right
functions.

Signed-off-by: Felipe Contreras <felipe.contreras@...il.com>
---
 kernel/params.c | 25 +++++++++----------------
 1 file changed, 9 insertions(+), 16 deletions(-)

diff --git a/kernel/params.c b/kernel/params.c
index c00d5b5..48e1a81 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -227,17 +227,10 @@ int parse_args(const char *doing,
 }
 
 /* Lazy bastard, eh? */
-#define STANDARD_PARAM_DEF(name, type, format, tmptype, strtolfn)      	\
+#define STANDARD_PARAM_DEF(name, type, format, strtolfn)      		\
 	int param_set_##name(const char *val, const struct kernel_param *kp) \
 	{								\
-		tmptype l;						\
-		int ret;						\
-									\
-		ret = strtolfn(val, 0, &l);				\
-		if (ret < 0 || ((type)l != l))				\
-			return ret < 0 ? ret : -EINVAL;			\
-		*((type *)kp->arg) = l;					\
-		return 0;						\
+		return strtolfn(val, 0, (type *)kp->arg);		\
 	}								\
 	int param_get_##name(char *buffer, const struct kernel_param *kp) \
 	{								\
@@ -253,13 +246,13 @@ int parse_args(const char *doing,
 	EXPORT_SYMBOL(param_ops_##name)
 
 
-STANDARD_PARAM_DEF(byte, unsigned char, "%hhu", unsigned long, kstrtoul);
-STANDARD_PARAM_DEF(short, short, "%hi", long, kstrtol);
-STANDARD_PARAM_DEF(ushort, unsigned short, "%hu", unsigned long, kstrtoul);
-STANDARD_PARAM_DEF(int, int, "%i", long, kstrtol);
-STANDARD_PARAM_DEF(uint, unsigned int, "%u", unsigned long, kstrtoul);
-STANDARD_PARAM_DEF(long, long, "%li", long, kstrtol);
-STANDARD_PARAM_DEF(ulong, unsigned long, "%lu", unsigned long, kstrtoul);
+STANDARD_PARAM_DEF(byte, unsigned char, "%hhu", kstrtou8);
+STANDARD_PARAM_DEF(short, short, "%hi", kstrtos16);
+STANDARD_PARAM_DEF(ushort, unsigned short, "%hu", kstrtou16);
+STANDARD_PARAM_DEF(int, int, "%i", kstrtoint);
+STANDARD_PARAM_DEF(uint, unsigned int, "%u", kstrtouint);
+STANDARD_PARAM_DEF(long, long, "%li", kstrtol);
+STANDARD_PARAM_DEF(ulong, unsigned long, "%lu", kstrtoul);
 
 int param_set_charp(const char *val, const struct kernel_param *kp)
 {
-- 
1.8.4.2+fc1

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