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Date: Thu, 2 Nov 2017 09:51:08 +0100
From: Ingo Molnar <mingo@kernel.org>
To: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>, Thomas Gleixner <tglx@linutronix.de>,
        "H. Peter Anvin" <hpa@zytor.com>, Andy Lutomirski <luto@kernel.org>,
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Subject: Re: [PATCH v10 02/13] x86/insn-eval: Compute linear address in
 several utility functions
Message-ID: <20171102085108.pgiem4kplrcmbzh6@gmail.com>
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* Ricardo Neri <ricardo.neri-calderon@linux.intel.com> wrote:

> +	/*
> +	 * -EDOM means that we must ignore the address_offset. In such a case,
> +	 * in 64-bit mode the effective address relative to the RIP of the
> +	 * following instruction.
> +	 */
> +	if (*regoff == -EDOM) {
> +		if (user_64bit_mode(regs))
> +			tmp = (long)regs->ip + insn->length;
> +		else
> +			tmp = 0;
> +	} else if (*regoff < 0) {
> +		return -EINVAL;
> +	} else {
> +		tmp = (long)regs_get_register(regs, *regoff);
> +	}

> +	else
> +		indx = (long)regs_get_register(regs, indx_offset);

This and subsequent patches include a disgustly insane amount of type casts - why?

For example here 'tmp' is 'long', while regs_get_register() returns
'unsigned long', but no type cast is necessary for that.

> +			ret = get_eff_addr_modrm(insn, regs, &addr_offset,
> +						 &eff_addr);

Also, please don't break lines slightly longer than 80 cols just to pacify 
checkpatch (and this holds for other patches as well) - the cure is worse than the 
illness!

Thanks,

	Ingo