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SubjectRe: [PATCH v3 07/21] x86/fpu/xstate: Introduce helpers to manage dynamic xstate buffers
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On Jan 26, 2021, at 12:17, Borislav Petkov <bp@suse.de> wrote:
> On Wed, Dec 23, 2020 at 07:57:03AM -0800, Chang S. Bae wrote:
>>
>> +int alloc_xstate_buffer(struct fpu *fpu, u64 mask)

<snip>

>> + if (newsz > fpu_kernel_xstate_max_size) {
>> + pr_warn_once("x86/fpu: xstate buffer too large (%u > %u bytes)\n",
>> + newsz, fpu_kernel_xstate_max_size);
>> + XSTATE_WARN_ON(1);
>> + return 0;
>
> return 0?!? On an error?!?

With more discussions, I now think it is too much to check like this. This
function (merely) allocates the requested size. So, going to remove it.

Thanks,
Chang

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