From 4b7775870b69129e640ed583c9b362d5cd66159d Mon Sep 17 00:00:00 2001 From: Arnd Bergmann <arnd@arndb.de> 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 <arnd@arndb.de> Acked-by: David S. Miller <davem@davemloft.net> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Andi Kleen <ak@suse.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Vasily Tarasov <vtaras@openvz.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> --- include/asm-mips/compat.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/asm-mips') diff --git a/include/asm-mips/compat.h b/include/asm-mips/compat.h index 67c3f8ec0303..568c76cdd900 100644 --- a/include/asm-mips/compat.h +++ b/include/asm-mips/compat.h @@ -37,8 +37,10 @@ typedef s32 compat_key_t; typedef s32 compat_int_t; typedef s32 compat_long_t; +typedef s64 compat_s64; typedef u32 compat_uint_t; typedef u32 compat_ulong_t; +typedef u64 compat_u64; struct compat_timespec { compat_time_t tv_sec; -- cgit v1.2.3