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

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Message-ID: <81c62af671ebbfad61dd46aa056050a56bf535a2.camel@perches.com>
Date:   Wed, 29 Nov 2023 18:52:24 -0800
From:   Joe Perches <joe@...ches.com>
To:     Baoquan He <bhe@...hat.com>, linux-kernel@...r.kernel.org
Cc:     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 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.