From 4b7775870b69129e640ed583c9b362d5cd66159d Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Sun, 15 Jul 2007 23:41:11 -0700 Subject: Introduce compat_u64 and compat_s64 types One common problem with 32 bit system call and ioctl emulation is the different alignment rules between i386 and 64 bit machines. A number of drivers work around this by marking the compat structures as 'attribute((packed))', which is not the right solution because it breaks all the non-x86 architectures that want to use the same compat code. Hopefully, this patch improves the situation, it introduces two new types, compat_u64 and compat_s64. These are defined on all architectures to have the same size and alignment as the 32 bit version of u64 and s64. Signed-off-by: Arnd Bergmann Acked-by: David S. Miller Cc: David Woodhouse Cc: Andi Kleen Cc: Benjamin Herrenschmidt Cc: Vasily Tarasov Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-ia64/compat.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/asm-ia64') diff --git a/include/asm-ia64/compat.h b/include/asm-ia64/compat.h index 40d01d80610d..0f6e5264ab8f 100644 --- a/include/asm-ia64/compat.h +++ b/include/asm-ia64/compat.h @@ -31,8 +31,10 @@ typedef s32 compat_timer_t; typedef s32 compat_int_t; typedef s32 compat_long_t; +typedef s64 __attribute__((aligned(4))) compat_s64; typedef u32 compat_uint_t; typedef u32 compat_ulong_t; +typedef u64 __attribute__((aligned(4))) compat_u64; struct compat_timespec { compat_time_t tv_sec; -- cgit v1.2.3