Re: [patch v5 06/19] x86/cpu: Provide a sane leaf 0xb/0x1f parser

[Thomas Gleixner <tglx@linutronix.de>]

On Mon, Feb 12 2024 at 16:00, Borislav Petkov wrote:
> On Mon, Feb 12, 2024 at 03:17:45PM +0100, Thomas Gleixner wrote:
>> Especially x2apic_shift is horrible and the comments of EBX are visually
>> impaired while with the C++ comments x2apic_shift looks natural and the
>> EBX comments are just open to the right and therefore simpler.
>
> I'd say, put comments *above* the member versus on the side. We don't
> like side comments, if you remember. :-)

In code, no. For struct definitions if they are strictly tabular
formatted, they are actually nice as they are more compact and take less
space than the above member variant.

		// eax
		u32	x2apic_shift	:  5, // Number of bits to shift APIC ID right
					      // for the topology ID at the next level
					: 27; // Reserved
		// ebx
		u32	num_processors	: 16, // Number of processors at current level
					: 16; // Reserved

versus:

		/* eax */
                	/*
                         * Number of bits to shift APIC ID right for the topology ID
	                 * at the next level
                         */
		u32	x2apic_shift	:  5,
                	/* Reserved */
					: 27;

		/* ebx */
                	 /* Number of processors at current level */
		u32	num_processors	: 16,
                	 /* Reserved */
					: 16;

This really makes my eyes bleed.