From patchwork Fri Feb 1 22:26:48 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [v2] bswap: Fix width of swap in leul_to_cpu Date: Fri, 01 Feb 2013 12:26:48 -0000 From: Richard Henderson X-Patchwork-Id: 217604 Message-Id: <1359757608-1927-1-git-send-email-rth@twiddle.net> To: qemu-devel@nongnu.org Cc: blauwirbel@gmail.com, afaerber@suse.de The misnamed HOST_LONG_BITS is really HOST_POINTER_BITS. Here we're explicitly using an unsigned long, rather than uintptr_t, so it is more correct to select the swap size via ULONG_MAX. Signed-off-by: Richard Henderson Acked-by: Andreas Färber --- include/qemu/bswap.h | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) This is the patch from http://lists.gnu.org/archive/html/qemu-devel/2013-01/msg05868.html with the commit message re-worded as per Andreas Färber feedback. r~ diff --git a/include/qemu/bswap.h b/include/qemu/bswap.h index e6d4798..d3af35d 100644 --- a/include/qemu/bswap.h +++ b/include/qemu/bswap.h @@ -2,8 +2,8 @@ #define BSWAP_H #include "config-host.h" - #include +#include #include "fpu/softfloat.h" #ifdef CONFIG_MACHINE_BSWAP_H @@ -458,7 +458,15 @@ static inline void cpu_to_32wu(uint32_t *p, uint32_t v) static inline unsigned long leul_to_cpu(unsigned long v) { - return le_bswap(v, HOST_LONG_BITS); + /* In order to break an include loop between here and + qemu-common.h, don't rely on HOST_LONG_BITS. */ +#if ULONG_MAX == UINT32_MAX + return le_bswap(v, 32); +#elif ULONG_MAX == UINT64_MAX + return le_bswap(v, 64); +#else +# error Unknown sizeof long +#endif } #undef le_bswap