linux-kernel - Re: [PATCH v3 2/7] kexec_file: print out debugging message if required

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Date:   Mon, 4 Dec 2023 16:43:05 +0800
From:   Baoquan He <bhe@...hat.com>
To:     Joe Perches <joe@...ches.com>
Cc:     linux-kernel@...r.kernel.org, kexec@...ts.infradead.org,
        x86@...nel.org, linux-arm-kernel@...ts.infradead.org,
        linux-riscv@...ts.infradead.org, linuxppc-dev@...ts.ozlabs.org,
        linux-parisc@...r.kernel.org, akpm@...ux-foundation.org,
        nathan@...nel.org
Subject: Re: [PATCH v3 2/7] kexec_file: print out debugging message if
 required

On 11/29/23 at 06:52pm, Joe Perches wrote:
> On Thu, 2023-11-30 at 10:39 +0800, Baoquan He wrote:
> > Replace pr_debug() with the newly added kexec_dprintk() in kexec_file
> > loading related codes.
> 
> trivia:
> 
> > diff --git a/kernel/crash_core.c b/kernel/crash_core.c
> []
> > @@ -551,9 +551,12 @@ int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map,
> >  		phdr->p_filesz = phdr->p_memsz = mend - mstart + 1;
> >  		phdr->p_align = 0;
> >  		ehdr->e_phnum++;
> > -		pr_debug("Crash PT_LOAD ELF header. phdr=%p vaddr=0x%llx, paddr=0x%llx, sz=0x%llx e_phnum=%d p_offset=0x%llx\n",
> > -			phdr, phdr->p_vaddr, phdr->p_paddr, phdr->p_filesz,
> > -			ehdr->e_phnum, phdr->p_offset);
> > +#ifdef CONFIG_KEXEC_FILE
> > +		kexec_dprintk("Crash PT_LOAD ELF header. phdr=%p vaddr=0x%llx, paddr=0x%llx, "
> > +			      "sz=0x%llx e_phnum=%d p_offset=0x%llx\n",
> > +			      phdr, phdr->p_vaddr, phdr->p_paddr, phdr->p_filesz,
> > +			      ehdr->e_phnum, phdr->p_offset);
> > +#endif
> 
> Perhaps run checkpatch and coalesce the format string.

Sorry for being late to reply, this comment was missed.

I broke it into two because it's a too long line and not friendly for
reading. I did notice there's such line breaking code. I can change it
if it's not suggested. Thanks for careful checking.