linux-kernel - Re: [PATCHv8 14/17] x86/traps: Handle LASS thrown #SS

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Message-ID: <19868e42-5f00-4127-a48c-ed48c0297a87@intel.com>
Date: Wed, 2 Jul 2025 10:56:25 -0700
From: Sohil Mehta <sohil.mehta@...el.com>
To: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
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Subject: Re: [PATCHv8 14/17] x86/traps: Handle LASS thrown #SS

On 7/2/2025 6:27 AM, Kirill A. Shutemov wrote:
>>> +
>>> +	if (cpu_feature_enabled(X86_FEATURE_LASS)) {
>>> +		enum kernel_exc_hint hint;
>>> +		unsigned long exc_addr;
>>> +
>>> +		hint = get_kernel_exc_address(regs, &exc_addr);
>>> +		if (hint != EXC_NO_HINT) {
>>
>> The brackets are not needed for singular statements. Also the max line
>> length is longer now. You can fit this all in a single line.
> 
> I think line split if justified. It is 120 characters long otherwise.
> And with multi-line statement, brackets help readability.
> 

Are you sure? Below ends at 90 characters for me, including the three
8-char tabs:

printk(SSFSTR ", %s 0x%lx", kernel_exc_hint_help[hint], exc_addr);

> I don't see a reason to change it.

To reduce indentation, you could also do:

	if (!cpu_feature_enabled(X86_FEATURE_LASS))
		goto error_trap;

> 
>>> +			printk(SSFSTR ", %s 0x%lx", kernel_exc_hint_help[hint],
>>> +			       exc_addr);
>>> +		}
>>> +
>>