[Xen-devel] [PATCH 1 of 4 v3] blktap: remove local definitions and include byteswap.h

[Roger Pau Monne <roger.pau@xxxxxxxxxxxxx>]

# HG changeset patch
# User Roger Pau Monne <roger.pau@xxxxxxxxxxxxx>
# Date 1324366300 -3600
# Node ID 32c735e9b6fc6250cb465d091e7fd30d95bf699e
# Parent  cf68eb390e1bf2fa4bb005ffeccfd41a01c3f81d
blktap: remove local definitions and include byteswap.h

Use the same approach as tools/blktap2/include/libvhd.h, remove local
definitions of bswap* and include byteswap.h. Also remove the
HAVE_BYTESWAP_H ifdef, since it was not defined in this context (it's
defined by QEMU).

Signed-off-by: Roger Pau Monne <roger.pau@xxxxxxxxxxxxx>

diff -r cf68eb390e1b -r 32c735e9b6fc tools/blktap/drivers/bswap.h
--- a/tools/blktap/drivers/bswap.h      Tue Dec 20 08:21:11 2011 +0100
+++ b/tools/blktap/drivers/bswap.h      Tue Dec 20 08:31:40 2011 +0100
@@ -13,45 +13,9 @@
 #define bswap_16(x) swap16(x)
 #define bswap_32(x) swap32(x)
 #define bswap_64(x) swap64(x)
-#else
+#elif defined(__linux__)
 
-#ifdef HAVE_BYTESWAP_H
 #include <byteswap.h>
-#else
-
-#define bswap_16(x) \
-({ \
-       uint16_t __x = (x); \
-       ((uint16_t)( \
-               (((uint16_t)(__x) & (uint16_t)0x00ffU) << 8) | \
-               (((uint16_t)(__x) & (uint16_t)0xff00U) >> 8) )); \
-})
-
-#define bswap_32(x) \
-({ \
-       uint32_t __x = (x); \
-       ((uint32_t)( \
-               (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
-               (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) <<  8) | \
-               (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >>  8) | \
-               (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )); \
-})
-
-#define bswap_64(x) \
-({ \
-       uint64_t __x = (x); \
-       ((uint64_t)( \
-               (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000000000ffULL) 
<< 56) | \
-               (uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000000000ff00ULL) 
<< 40) | \
-               (uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000000000ff0000ULL) 
<< 24) | \
-               (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000ff000000ULL) 
<<  8) | \
-               (uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000ff00000000ULL) 
>>  8) | \
-               (uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000ff0000000000ULL) 
>> 24) | \
-               (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00ff000000000000ULL) 
>> 40) | \
-               (uint64_t)(((uint64_t)(__x) & (uint64_t)0xff00000000000000ULL) 
>> 56) )); \
-})
-
-#endif /* !HAVE_BYTESWAP_H */
 
 static inline uint16_t bswap16(uint16_t x)
 {

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