From: Joe Eykholt <jeykholt@cisco.com>
Date: Fri, 9 Apr 2010 21:22:39 +0000 (-0700)
Subject: [SCSI] libfc: fix hton24 macro to take expressions as args
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=0b2f74a47f2b10bd4c70324820a93c070b3960a5;p=linux-beck.git

[SCSI] libfc: fix hton24 macro to take expressions as args

hton24(p + 3, value) would fail to compile because
p + 3[0] is not a valid expression.

Went ahead and converted hton24 and ntoh24 to inline
functions, which is better because the parameters
are evalutated only once.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
---

diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index 8d0d1b2d8258..a26bb50c0c8b 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -47,13 +47,18 @@
 #define ntohll(x) be64_to_cpu(x)
 #define htonll(x) cpu_to_be64(x)
 
-#define ntoh24(p) (((p)[0] << 16) | ((p)[1] << 8) | ((p)[2]))
 
-#define hton24(p, v)	do {			\
-		p[0] = (((v) >> 16) & 0xFF);	\
-		p[1] = (((v) >> 8) & 0xFF);	\
-		p[2] = ((v) & 0xFF);		\
-	} while (0)
+static inline u32 ntoh24(const u8 *p)
+{
+	return (p[0] << 16) | (p[1] << 8) | p[2];
+}
+
+static inline void hton24(u8 *p, u32 v)
+{
+	p[0] = (v >> 16) & 0xff;
+	p[1] = (v >> 8) & 0xff;
+	p[2] = v & 0xff;
+}
 
 /**
  * enum fc_lport_state - Local port states