Andi Kleen <[EMAIL PROTECTED]> writes: > Don't need 16 byte alignment because kernel doesn't use SSE2 > ... > cflags-y += -maccumulate-outgoing-args > +cflags-y += -mpreferred-stack-boundary=4 >
>From gcc manpage: -mpreferred-stack-boundary=num Attempt to keep the stack boundary aligned to a 2 raised to num byte boundary. If -mpreferred-stack-boundary is not specified, the default is 4 (16 bytes or 128 bits), except when optimizing for code size (-Os), in which case the default is the minimum correct alignment (4 bytes for x86, and 8 bytes for x86-64). So -mpreferred-stack-boundary=4 is the default and to align stack to 8 bytes you want -mpreferred-stack-boundary=3, not 4, IIUC. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/