linux-kernel - [PATCH v2 3/3] Constify some function parameters

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Date:	Wed, 6 Jul 2016 18:44:28 +0200
From:	Emese Revfy <re.emese@...il.com>
To:	kernel-hardening@...ts.openwall.com
Cc:	pageexec@...email.hu, spender@...ecurity.net, mmarek@...e.com,
	keescook@...omium.org, linux-kernel@...r.kernel.org,
	yamada.masahiro@...ionext.com, linux-kbuild@...r.kernel.org,
	minipli@...linux.so, linux@...linux.org.uk,
	catalin.marinas@....com, linux@...musvillemoes.dk,
	david.brown@...aro.org, benh@...nel.crashing.org,
	tglx@...utronix.de, akpm@...ux-foundation.org,
	jlayton@...chiereds.net, arnd@...db.de, sam@...nborg.org,
	isdn@...ux-pingi.de
Subject: [PATCH v2 3/3] Constify some function parameters

Initify needs const pointer types, the initify plugin caught some __printf
arguments that weren't const yet.

Signed-off-by: Emese Revfy <re.emese@...il.com>
---
 drivers/isdn/hisax/config.c | 16 ++++++++--------
 drivers/isdn/hisax/hisax.h  |  4 ++--
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/isdn/hisax/config.c b/drivers/isdn/hisax/config.c
index bf04d2a..2d12c6c 100644
--- a/drivers/isdn/hisax/config.c
+++ b/drivers/isdn/hisax/config.c
@@ -659,7 +659,7 @@ int jiftime(char *s, long mark)
 
 static u_char tmpbuf[HISAX_STATUS_BUFSIZE];
 
-void VHiSax_putstatus(struct IsdnCardState *cs, char *head, char *fmt,
+void VHiSax_putstatus(struct IsdnCardState *cs, char *head, const char *fmt,
 		      va_list args)
 {
 	/* if head == NULL the fmt contains the full info */
@@ -669,23 +669,24 @@ void VHiSax_putstatus(struct IsdnCardState *cs, char *head, char *fmt,
 	u_char		*p;
 	isdn_ctrl	ic;
 	int		len;
+	const u_char	*data;
 
 	if (!cs) {
 		printk(KERN_WARNING "HiSax: No CardStatus for message");
 		return;
 	}
 	spin_lock_irqsave(&cs->statlock, flags);
-	p = tmpbuf;
 	if (head) {
+		p = tmpbuf;
 		p += jiftime(p, jiffies);
 		p += sprintf(p, " %s", head);
 		p += vsprintf(p, fmt, args);
 		*p++ = '\n';
 		*p = 0;
 		len = p - tmpbuf;
-		p = tmpbuf;
+		data = tmpbuf;
 	} else {
-		p = fmt;
+		data = fmt;
 		len = strlen(fmt);
 	}
 	if (len > HISAX_STATUS_BUFSIZE) {
@@ -699,13 +700,12 @@ void VHiSax_putstatus(struct IsdnCardState *cs, char *head, char *fmt,
 	if (i >= len)
 		i = len;
 	len -= i;
-	memcpy(cs->status_write, p, i);
+	memcpy(cs->status_write, data, i);
 	cs->status_write += i;
 	if (cs->status_write > cs->status_end)
 		cs->status_write = cs->status_buf;
-	p += i;
 	if (len) {
-		memcpy(cs->status_write, p, len);
+		memcpy(cs->status_write, data + i, len);
 		cs->status_write += len;
 	}
 #ifdef KERNELSTACK_DEBUG
@@ -729,7 +729,7 @@ void VHiSax_putstatus(struct IsdnCardState *cs, char *head, char *fmt,
 	}
 }
 
-void HiSax_putstatus(struct IsdnCardState *cs, char *head, char *fmt, ...)
+void HiSax_putstatus(struct IsdnCardState *cs, char *head, const char *fmt, ...)
 {
 	va_list args;
 
diff --git a/drivers/isdn/hisax/hisax.h b/drivers/isdn/hisax/hisax.h
index 6ead6314..338d040 100644
--- a/drivers/isdn/hisax/hisax.h
+++ b/drivers/isdn/hisax/hisax.h
@@ -1288,9 +1288,9 @@ int jiftime(char *s, long mark);
 int HiSax_command(isdn_ctrl *ic);
 int HiSax_writebuf_skb(int id, int chan, int ack, struct sk_buff *skb);
 __printf(3, 4)
-void HiSax_putstatus(struct IsdnCardState *cs, char *head, char *fmt, ...);
+void HiSax_putstatus(struct IsdnCardState *cs, char *head, const char *fmt, ...);
 __printf(3, 0)
-void VHiSax_putstatus(struct IsdnCardState *cs, char *head, char *fmt, va_list args);
+void VHiSax_putstatus(struct IsdnCardState *cs, char *head, const char *fmt, va_list args);
 void HiSax_reportcard(int cardnr, int sel);
 int QuickHex(char *txt, u_char *p, int cnt);
 void LogFrame(struct IsdnCardState *cs, u_char *p, int size);
-- 
2.8.1