linux-kernel - Re: [PATCH v2 3/3] RISC-V: Add arch functions to support hibernation/suspend-to-disk

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Date:   Tue, 10 Jan 2023 20:22:00 +0000
From:   Conor Dooley <conor@...nel.org>
To:     JeeHeng Sia <jeeheng.sia@...rfivetech.com>
Cc:     Andrew Jones <ajones@...tanamicro.com>,
        "paul.walmsley@...ive.com" <paul.walmsley@...ive.com>,
        "palmer@...belt.com" <palmer@...belt.com>,
        "aou@...s.berkeley.edu" <aou@...s.berkeley.edu>,
        "linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Leyfoon Tan <leyfoon.tan@...rfivetech.com>,
        Mason Huo <mason.huo@...rfivetech.com>
Subject: Re: [PATCH v2 3/3] RISC-V: Add arch functions to support
 hibernation/suspend-to-disk

Hey JeeHeng,

On Tue, Jan 10, 2023 at 08:37:01AM +0000, JeeHeng Sia wrote:
> > From: Andrew Jones <ajones@...tanamicro.com>
> > On Mon, Jan 09, 2023 at 02:24:07PM +0800, Sia Jee Heng wrote:

> > > +/* Helper parameters that help us to restore the image.
> > 
> > Separate line for /*
> ok

I'm not sure why this one struct has an actual description that
resembles kerneldoc, when nothing else does - but why not make it
actually kerneldoc, as you're almost there as things stand:
https://docs.kernel.org/doc-guide/kernel-doc.html#structure-union-and-enumeration-documentation

> > > + * @hartid: To make sure same boot_cpu executing the hibernate/restore
> > code.
> > > + * @saved_satp: Original page table used by the hibernated image.
> > > + * @restore_cpu_addr: The kernel's image address to restore the CPU
> > context.

^^ also your mail client is doing some really odd things wrapping wise.

> > > +static unsigned long temp_pgtable_map_pmd(pmd_t *pmdp, unsigned
> > long vaddr, pgprot_t prot)
> > > +{
> > > +	uintptr_t pmd_idx = pmd_index(vaddr);
> > > +	pte_t *ptep;
> > > +
> > > +	if (pmd_none(pmdp[pmd_idx])) {
> > > +		ptep = (pte_t *) get_safe_page(GFP_ATOMIC);
> > 
> > No space between cast and function. Same comment for following functions.
> > I thought checkpatch complained about that.
> Ok. But it is weird that checkpatch doesn't report the issue.

It does:
20:08:17 conor /stuff/linux$ ./scripts/checkpatch.pl --strict --terse -g HEAD~3..HEAD
7481f133eb0310496742c27d15a20fdd2c499d29:97: CHECK: Alignment should match open parenthesis
[...]
7481f133eb0310496742c27d15a20fdd2c499d29:370: CHECK: No space is necessary after a cast
[...]
7481f133eb0310496742c27d15a20fdd2c499d29:460: CHECK: No space is necessary after a cast
7481f133eb0310496742c27d15a20fdd2c499d29:467: CHECK: No space is necessary after a cast
7481f133eb0310496742c27d15a20fdd2c499d29:475: CHECK: Blank lines aren't necessary after an open brace '{'
7481f133eb0310496742c27d15a20fdd2c499d29:480: CHECK: No space is necessary after a cast
7481f133eb0310496742c27d15a20fdd2c499d29:487: CHECK: No space is necessary after a cast
7481f133eb0310496742c27d15a20fdd2c499d29:499: CHECK: No space is necessary after a cast
7481f133eb0310496742c27d15a20fdd2c499d29:506: CHECK: No space is necessary after a cast
7481f133eb0310496742c27d15a20fdd2c499d29:518: CHECK: No space is necessary after a cast
7481f133eb0310496742c27d15a20fdd2c499d29:525: CHECK: No space is necessary after a cast
7481f133eb0310496742c27d15a20fdd2c499d29:577: CHECK: No space is necessary after a cast
7481f133eb0310496742c27d15a20fdd2c499d29:591: CHECK: Alignment should match open parenthesis
7481f133eb0310496742c27d15a20fdd2c499d29:596: CHECK: Alignment should match open parenthesis
total: 0 errors, 1 warnings, 21 checks, 545 lines checked

The patchwork automation seems to have ignored this patchset for some
reason. It was stuck on a patchset for some reason and this one may
have got skipped when I tried to sort that out.
Ordinarily, you'd see it complaining about these sorts of things.

Thanks,
Conor.


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