Re: [PATCH v4 1/4] mm: reference totalram_pages and managed_pages once per function

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On Mon, Nov 12, 2018 at 11:37:46AM +0530, Arun KS wrote:
> +++ b/arch/um/kernel/mem.c
> @@ -51,8 +51,7 @@ void __init mem_init(void)
>  
>  	/* this will put all low memory onto the freelists */
>  	memblock_free_all();
> -	max_low_pfn = totalram_pages;
> -	max_pfn = totalram_pages;
> +	max_pfn = max_low_pfn = totalram_pages;

We don't normally do "a = b = c".  How about:

 	max_low_pfn = totalram_pages;
-	max_pfn = totalram_pages;
+	max_pfn = max_low_pfn;

> +++ b/arch/x86/kernel/cpu/microcode/core.c
> @@ -434,9 +434,10 @@ static ssize_t microcode_write(struct file *file, const char __user *buf,
>  			       size_t len, loff_t *ppos)
>  {
>  	ssize_t ret = -EINVAL;
> +	unsigned long totalram_pgs = totalram_pages;

Can't we use a better variable name here?  Even nr_pages would look
better to me.

> +++ b/drivers/hv/hv_balloon.c
> +	unsigned long totalram_pgs = totalram_pages;

Ditto

> +++ b/fs/file_table.c
> +	unsigned long totalram_pgs = totalram_pages;

... throughout, I guess.




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