linux-kernel - Re: [PATCH v2 1/3] zram: Replace bit spinlocks with a spinlock

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Message-ID: <20240704121908.GjH4p40u@linutronix.de>
Date: Thu, 4 Jul 2024 14:19:08 +0200
From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To: Alexander Lobakin <aleksander.lobakin@...el.com>
Cc: linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
	Minchan Kim <minchan@...nel.org>,
	Sergey Senozhatsky <senozhatsky@...omium.org>,
	Jens Axboe <axboe@...nel.dk>, Thomas Gleixner <tglx@...utronix.de>,
	Mike Galbraith <umgwanakikbuti@...il.com>
Subject: Re: [PATCH v2 1/3] zram: Replace bit spinlocks with a spinlock_t.

On 2024-07-04 13:38:04 [+0200], Alexander Lobakin wrote:
> > index 3acd7006ad2cc..036845cd4f25e 100644
> > --- a/drivers/block/zram/zram_drv.c
> > +++ b/drivers/block/zram/zram_drv.c
> > @@ -57,19 +57,34 @@ static void zram_free_page(struct zram *zram, size_t index);
> >  static int zram_read_page(struct zram *zram, struct page *page, u32 index,
> >  			  struct bio *parent);
> >  
> > +static void zram_meta_init_table_locks(struct zram *zram, size_t num_pages)
> > +{
> > +	size_t index;
> > +
> > +	for (index = 0; index < num_pages; index++)
> 
> Maybe declare @index right here?

But why? Declarations at the top followed by code. 

> 
> > +		spin_lock_init(&zram->table[index].lock);
> > +}
> 
> [...]
> 
> Thanks,
> Olek

Sebastian