[PATCH] x86: Make _syscallX() macros compile in PIC mode

[PATCH] x86: Make _syscallX() macros compile in PIC mode

Gcc reserves %ebx when compiling position-independent-code on i386.  This
means, the _syscallX() macros in include/asm-i386/unistd.h will not
compile.  This patch is changes the existing macros to take special care to
preserve %ebx.

The bug can be tracked at http://bugzilla.kernel.org/show_bug.cgi?id=6204

Signed-off-by: Markus Gutschke <markus@google.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>