Re: [PATCH 05/10] mm: remove flag argument from soft offline functions

[David Hildenbrand <david@redhat.com>]

On 10.09.19 12:30, Oscar Salvador wrote:
> From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
> 
> The argument @flag no longer affects the behavior of soft_offline_page()
> and its variants, so let's remove them.
> 
> Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
> Signed-off-by: Oscar Salvador <osalvador@suse.de>
> ---
>  drivers/base/memory.c |  2 +-
>  include/linux/mm.h    |  2 +-
>  mm/madvise.c          |  2 +-
>  mm/memory-failure.c   | 27 +++++++++++++--------------
>  4 files changed, 16 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/base/memory.c b/drivers/base/memory.c
> index 6bea4f3f8040..e5485c22ef77 100644
> --- a/drivers/base/memory.c
> +++ b/drivers/base/memory.c
> @@ -540,7 +540,7 @@ static ssize_t soft_offline_page_store(struct device *dev,
>  	pfn >>= PAGE_SHIFT;
>  	if (!pfn_valid(pfn))
>  		return -ENXIO;
> -	ret = soft_offline_page(pfn_to_page(pfn), 0);
> +	ret = soft_offline_page(pfn_to_page(pfn));
>  	return ret == 0 ? count : ret;
>  }
>  
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index fb36a4165a4e..3cc800d9f57a 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -2827,7 +2827,7 @@ extern int sysctl_memory_failure_early_kill;
>  extern int sysctl_memory_failure_recovery;
>  extern void shake_page(struct page *p, int access);
>  extern atomic_long_t num_poisoned_pages __read_mostly;
> -extern int soft_offline_page(struct page *page, int flags);
> +extern int soft_offline_page(struct page *page);
>  
>  
>  /*
> diff --git a/mm/madvise.c b/mm/madvise.c
> index fbe6d402232c..ece128211400 100644
> --- a/mm/madvise.c
> +++ b/mm/madvise.c
> @@ -906,7 +906,7 @@ static int madvise_inject_error(int behavior,
>  			pr_info("Soft offlining pfn %#lx at process virtual address %#lx\n",
>  					pfn, start);
>  
> -			ret = soft_offline_page(page, 0);
> +			ret = soft_offline_page(page);
>  			if (ret)
>  				return ret;
>  			continue;
> diff --git a/mm/memory-failure.c b/mm/memory-failure.c
> index 1be785b25324..5071d39bdfef 100644
> --- a/mm/memory-failure.c
> +++ b/mm/memory-failure.c
> @@ -1478,7 +1478,7 @@ static void memory_failure_work_func(struct work_struct *work)
>  		if (!gotten)
>  			break;
>  		if (entry.flags & MF_SOFT_OFFLINE)
> -			soft_offline_page(pfn_to_page(entry.pfn), entry.flags);
> +			soft_offline_page(pfn_to_page(entry.pfn));
>  		else
>  			memory_failure(entry.pfn, entry.flags);
>  	}
> @@ -1611,7 +1611,7 @@ static struct page *new_page(struct page *p, unsigned long private)
>   * that is not free, and 1 for any other page type.
>   * For 1 the page is returned with increased page count, otherwise not.
>   */
> -static int __get_any_page(struct page *p, unsigned long pfn, int flags)
> +static int __get_any_page(struct page *p, unsigned long pfn)
>  {
>  	int ret;
>  
> @@ -1638,9 +1638,9 @@ static int __get_any_page(struct page *p, unsigned long pfn, int flags)
>  	return ret;
>  }
>  
> -static int get_any_page(struct page *page, unsigned long pfn, int flags)
> +static int get_any_page(struct page *page, unsigned long pfn)
>  {
> -	int ret = __get_any_page(page, pfn, flags);
> +	int ret = __get_any_page(page, pfn);
>  
>  	if (ret == 1 && !PageHuge(page) &&
>  	    !PageLRU(page) && !__PageMovable(page)) {
> @@ -1653,7 +1653,7 @@ static int get_any_page(struct page *page, unsigned long pfn, int flags)
>  		/*
>  		 * Did it turn free?
>  		 */
> -		ret = __get_any_page(page, pfn, 0);
> +		ret = __get_any_page(page, pfn);
>  		if (ret == 1 && !PageLRU(page)) {
>  			/* Drop page reference which is from __get_any_page() */
>  			put_hwpoison_page(page);
> @@ -1665,7 +1665,7 @@ static int get_any_page(struct page *page, unsigned long pfn, int flags)
>  	return ret;
>  }
>  
> -static int soft_offline_huge_page(struct page *page, int flags)
> +static int soft_offline_huge_page(struct page *page)
>  {
>  	int ret;
>  	unsigned long pfn = page_to_pfn(page);
> @@ -1724,7 +1724,7 @@ static int soft_offline_huge_page(struct page *page, int flags)
>  	return ret;
>  }
>  
> -static int __soft_offline_page(struct page *page, int flags)
> +static int __soft_offline_page(struct page *page)
>  {
>  	int ret;
>  	unsigned long pfn = page_to_pfn(page);
> @@ -1804,7 +1804,7 @@ static int __soft_offline_page(struct page *page, int flags)
>  	return ret;
>  }
>  
> -static int soft_offline_in_use_page(struct page *page, int flags)
> +static int soft_offline_in_use_page(struct page *page)
>  {
>  	int ret;
>  	int mt;
> @@ -1834,9 +1834,9 @@ static int soft_offline_in_use_page(struct page *page, int flags)
>  	mt = get_pageblock_migratetype(page);
>  	set_pageblock_migratetype(page, MIGRATE_ISOLATE);
>  	if (PageHuge(page))
> -		ret = soft_offline_huge_page(page, flags);
> +		ret = soft_offline_huge_page(page);
>  	else
> -		ret = __soft_offline_page(page, flags);
> +		ret = __soft_offline_page(page);
>  	set_pageblock_migratetype(page, mt);
>  	return ret;
>  }
> @@ -1857,7 +1857,6 @@ static int soft_offline_free_page(struct page *page)
>  /**
>   * soft_offline_page - Soft offline a page.
>   * @page: page to offline
> - * @flags: flags. Same as memory_failure().
>   *
>   * Returns 0 on success, otherwise negated errno.
>   *
> @@ -1876,7 +1875,7 @@ static int soft_offline_free_page(struct page *page)
>   * This is not a 100% solution for all memory, but tries to be
>   * ``good enough'' for the majority of memory.
>   */
> -int soft_offline_page(struct page *page, int flags)
> +int soft_offline_page(struct page *page)
>  {
>  	int ret;
>  	unsigned long pfn = page_to_pfn(page);
> @@ -1893,11 +1892,11 @@ int soft_offline_page(struct page *page, int flags)
>  	}
>  
>  	get_online_mems();
> -	ret = get_any_page(page, pfn, flags);
> +	ret = get_any_page(page, pfn);
>  	put_online_mems();
>  
>  	if (ret > 0)
> -		ret = soft_offline_in_use_page(page, flags);
> +		ret = soft_offline_in_use_page(page);
>  	else if (ret == 0)
>  		ret = soft_offline_free_page(page);
>  
> 

Acked-by: David Hildenbrand <david@redhat.com>

-- 

Thanks,

David / dhildenb