linux-kernel - [PATCH 23/24] types: add C99-style constructors to <asm-generic/int-*.h>

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Date:	Thu, 24 Apr 2008 16:05:51 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux Arch Mailing List <linux-arch@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: [PATCH 23/24] types: add C99-style constructors to <asm-generic/int-*.h>

Add C99-style constructor macros for fixed types to
<asm-generic/int-*.h>.  Since Linux uses names like "u64" instead of
"uint64_t", the constructor macros are called U64_C() instead of
UINT64_C() and so forth.

These macros allow specific sizes to be specified as
U64_C(0x123456789abcdef), without gcc issuing warnings as it will if
one writes (u64)0x123456789abcdef.

When used from assembly, these macros pass their argument unchanged.

Signed-off-by: H. Peter Anvin <hpa@...or.com>
---
 include/asm-generic/int-l64.h  |   20 ++++++++++++++++++++
 include/asm-generic/int-ll64.h |   20 ++++++++++++++++++++
 2 files changed, 40 insertions(+), 0 deletions(-)

diff --git a/include/asm-generic/int-l64.h b/include/asm-generic/int-l64.h
index 629b5a4..2af9b75 100644
--- a/include/asm-generic/int-l64.h
+++ b/include/asm-generic/int-l64.h
@@ -44,6 +44,26 @@ typedef unsigned int u32;
 typedef signed long s64;
 typedef unsigned long u64;
 
+#define S8_C(x)  x
+#define U8_C(x)  x ## U
+#define S16_C(x) x
+#define U16_C(x) x ## U
+#define S32_C(x) x
+#define U32_C(x) x ## U
+#define S64_C(x) x ## L
+#define U64_C(x) x ## UL
+
+#else /* __ASSEMBLY__ */
+
+#define S8_C(x)  x
+#define U8_C(x)  x
+#define S16_C(x) x
+#define U16_C(x) x
+#define S32_C(x) x
+#define U32_C(x) x
+#define S64_C(x) x
+#define U64_C(x) x
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* __KERNEL__ */
diff --git a/include/asm-generic/int-ll64.h b/include/asm-generic/int-ll64.h
index 1e5ffec..2609489 100644
--- a/include/asm-generic/int-ll64.h
+++ b/include/asm-generic/int-ll64.h
@@ -49,6 +49,26 @@ typedef unsigned int u32;
 typedef signed long long s64;
 typedef unsigned long long u64;
 
+#define S8_C(x)  x
+#define U8_C(x)  x ## U
+#define S16_C(x) x
+#define U16_C(x) x ## U
+#define S32_C(x) x
+#define U32_C(x) x ## U
+#define S64_C(x) x ## LL
+#define U64_C(x) x ## ULL
+
+#else /* __ASSEMBLY__ */
+
+#define S8_C(x)  x
+#define U8_C(x)  x
+#define S16_C(x) x
+#define U16_C(x) x
+#define S32_C(x) x
+#define U32_C(x) x
+#define S64_C(x) x
+#define U64_C(x) x
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* __KERNEL__ */
-- 
1.5.4.1

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