linux-kernel - Re: [PATCH] powerpc/powernv: Rename pe_level_printk to pe_printk and embed KERN

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Message-ID: <732ae03a-f0a7-450c-8896-e8a4975a5254@csgroup.eu>
Date: Wed, 27 Aug 2025 18:42:50 +0200
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Joe Perches <joe@...ches.com>
Cc: linuxppc-dev@...ts.ozlabs.org, linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] powerpc/powernv: Rename pe_level_printk to pe_printk and
 embed KERN_LEVEL in format

Hi Joe

Le 21/06/2019 à 07:36, Joe Perches a écrit :
> Remove the separate KERN_<LEVEL> from each pe_level_printk and
> instead add the KERN_<LEVEL> to the format.
> 
> pfix in pe_level_printk could also be used uninitialized so
> add a new else and set pfx to the hex value of pe->flags.
> 
> Rename pe_level_printk to pe_printk and update the pe_<level>
> macros.
> 
> Signed-off-by: Joe Perches <joe@...ches.com>
> ---
>   arch/powerpc/platforms/powernv/pci-ioda.c | 14 ++++++++++++--
>   arch/powerpc/platforms/powernv/pci.h      | 11 +++++------
>   2 files changed, 17 insertions(+), 8 deletions(-)

I can't see the added value of this patch, it adds more lines than it 
removes.

Christophe

> 
> diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
> index 10cc42b9e541..60fc36ae626a 100644
> --- a/arch/powerpc/platforms/powernv/pci-ioda.c
> +++ b/arch/powerpc/platforms/powernv/pci-ioda.c
> @@ -50,15 +50,23 @@
>   static const char * const pnv_phb_names[] = { "IODA1", "IODA2", "NPU_NVLINK",
>   					      "NPU_OCAPI" };
>   
> -void pe_level_printk(const struct pnv_ioda_pe *pe, const char *level,
> -			    const char *fmt, ...)
> +void pe_printk(const struct pnv_ioda_pe *pe, const char *fmt, ...)
>   {
>   	struct va_format vaf;
>   	va_list args;
>   	char pfix[32];
> +	char level[PRINTK_MAX_SINGLE_HEADER_LEN + 1] = "\0";
>   
>   	va_start(args, fmt);
>   
> +	while (printk_get_level(fmt)) {
> +		size_t size = printk_skip_level(fmt) - fmt;
> +
> +		memcpy(level, fmt,  size);
> +		level[size] = '\0';
> +		fmt += size;
> +	}
> +
>   	vaf.fmt = fmt;
>   	vaf.va = &args;
>   
> @@ -74,6 +82,8 @@ void pe_level_printk(const struct pnv_ioda_pe *pe, const char *level,
>   			(pe->rid & 0xff00) >> 8,
>   			PCI_SLOT(pe->rid), PCI_FUNC(pe->rid));
>   #endif /* CONFIG_PCI_IOV*/
> +	else
> +		sprintf(pfix, "(flags: 0x%lx)", pe->flags);
>   
>   	printk("%spci %s: [PE# %.2x] %pV",
>   	       level, pfix, pe->pe_number, &vaf);
> diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h
> index be26ab3d99e0..870b21f55b3f 100644
> --- a/arch/powerpc/platforms/powernv/pci.h
> +++ b/arch/powerpc/platforms/powernv/pci.h
> @@ -205,15 +205,14 @@ extern unsigned long pnv_pci_ioda2_get_table_size(__u32 page_shift,
>   		__u64 window_size, __u32 levels);
>   extern int pnv_eeh_post_init(void);
>   
> -__printf(3, 4)
> -extern void pe_level_printk(const struct pnv_ioda_pe *pe, const char *level,
> -			    const char *fmt, ...);
> +__printf(2, 3)
> +extern void pe_printk(const struct pnv_ioda_pe *pe, const char *fmt, ...);
>   #define pe_err(pe, fmt, ...)					\
> -	pe_level_printk(pe, KERN_ERR, fmt, ##__VA_ARGS__)
> +	pe_printk(pe, KERN_ERR fmt, ##__VA_ARGS__)
>   #define pe_warn(pe, fmt, ...)					\
> -	pe_level_printk(pe, KERN_WARNING, fmt, ##__VA_ARGS__)
> +	pe_printk(pe, KERN_WARNING fmt, ##__VA_ARGS__)
>   #define pe_info(pe, fmt, ...)					\
> -	pe_level_printk(pe, KERN_INFO, fmt, ##__VA_ARGS__)
> +	pe_printk(pe, KERN_INFO fmt, ##__VA_ARGS__)
>   
>   /* Nvlink functions */
>   extern void pnv_npu_try_dma_set_bypass(struct pci_dev *gpdev, bool bypass);