From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Vishal Moola (Oracle)" Subject: [PATCH v4 01/23] pagemap: Add filemap_grab_folio() Date: Wed, 2 Nov 2022 09:10:09 -0700 Message-ID: <20221102161031.5820-2-vishal.moola@gmail.com> References: <20221102161031.5820-1-vishal.moola@gmail.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=lbrAaY6idpkhBtxaaJGwUptujZ0EZql70PDCszR9xSI=; b=b22oyujJhcmEnIoOWyXlmdwFsWtvDDEbrYWi+tTl/IKQZadCXIum/ufaWsfiuhgQWs P0ejMWAXsFFxmUJWgjcqRWL6iDvmTJOBHMdvrWNuXSDSGhujg7k49tnS+xBECZ0DDC1D QEeKOjhkuj2U1fYHa3KM1TSvYvE4FrIPOrf/CN/DjK2k7Ii76jHakZpfzft8GgAI2TOi 3dtL4HfeEfRRNgP7Mp0GAgu1ZDeKvnGqK9CY4nsrmEB3lEEy5PFMtwvBwHVV7JaSQ4Oc JqTTGwFIB+4o1Aa2ylRSznqsjRcz5BF5gANEbFRauGWLvr7/47QbInfDSn9b5QQsOYI/ 8XPQ== In-Reply-To: <20221102161031.5820-1-vishal.moola@gmail.com> List-ID: Content-Type: text/plain; charset="us-ascii" To: linux-fsdevel@vger.kernel.org Cc: linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org, linux-btrfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-cifs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nilfs@vger.kernel.org, linux-mm@kvack.org, "Vishal Moola (Oracle)" , Matthew Wilcox Add function filemap_grab_folio() to grab a folio from the page cache. This function is meant to serve as a folio replacement for grab_cache_page, and is used to facilitate the removal of find_get_pages_range_tag(). Signed-off-by: Vishal Moola (Oracle) Reviewed-by: Matthew Wilcox (Oracle) --- include/linux/pagemap.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index bbccb4044222..74d87e37a142 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -547,6 +547,26 @@ static inline struct folio *filemap_lock_folio(struct address_space *mapping, return __filemap_get_folio(mapping, index, FGP_LOCK, 0); } +/** + * filemap_grab_folio - grab a folio from the page cache + * @mapping: The address space to search + * @index: The page index + * + * Looks up the page cache entry at @mapping & @index. If no folio is found, + * a new folio is created. The folio is locked, marked as accessed, and + * returned. + * + * Return: A found or created folio. NULL if no folio is found and failed to + * create a folio. + */ +static inline struct folio *filemap_grab_folio(struct address_space *mapping, + pgoff_t index) +{ + return __filemap_get_folio(mapping, index, + FGP_LOCK | FGP_ACCESSED | FGP_CREAT, + mapping_gfp_mask(mapping)); +} + /** * find_get_page - find and get a page reference * @mapping: the address_space to search -- 2.38.1