Re: [PATCH] x86/sgx: Use goto to remove redundant if check in sgx_encl_init

[Jarkko Sakkinen <jarkko@kernel.org>]

On Fri, Dec 12, 2025 at 10:05:00PM +0100, Thorsten Blum wrote:
> On 11. Dec 2025, at 21:15, Jarkko Sakkinen wrote:
> > On Thu, Dec 11, 2025 at 10:03:56PM +0200, Jarkko Sakkinen wrote:
> >> On Wed, Dec 10, 2025 at 04:48:08PM +0100, Thorsten Blum wrote:
> >>> On 10. Dec 2025, at 16:32, Jarkko Sakkinen wrote:
> >>>> On Wed, Dec 10, 2025 at 02:00:35PM +0100, Thorsten Blum wrote:
> >>>>> Immediately break out of both loops when 'ret != SGX_UNMASKED_EVENT'
> >>>>> instead of checking for the same condition again in the outer loop.
> >>>>> 
> >>>>> Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
> >>>>> ---
> >>>>> [...]
> >>>> 
> >>>> I don't think moving code around is very useful.
> >>> 
> >>> The patch doesn't actually move any code around, but it removes up to 50
> >>> (SGX_EINIT_SLEEP_COUNT) duplicate and therefore unnecessary if checks in
> >>> the outer for loop.
> >> 
> >> Temporary change for generating disassembly:
> >> [...]
> > 
> > It pretty much does what I said i.e., shuffles a new location for a code block.
> 
> GCC emits a much larger diff; however, discussing the patch based solely
> on the disassembled code probably isn't very meaningful.

It does close the "does nothing useful" claim. It really does nothing 
useful.


> 
> Thanks,
> Thorsten
> 
> 

BR, Jarkko