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[76.102.73.225]) by smtp.googlemail.com with ESMTPSA id pj12-20020a17090b4f4c00b00200b12f2bf5sm145037pjb.1.2022.10.17.13.24.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Oct 2022 13:24:55 -0700 (PDT) From: "Vishal Moola (Oracle)" 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)" Subject: [PATCH v3 01/23] pagemap: Add filemap_grab_folio() Date: Mon, 17 Oct 2022 13:24:29 -0700 Message-Id: <20221017202451.4951-2-vishal.moola@gmail.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20221017202451.4951-1-vishal.moola@gmail.com> References: <20221017202451.4951-1-vishal.moola@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1666038296; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=GbkaK1BhnmuuyeEPYHO1j/C42qAqDKaBYuSZ7EsnhRU=; b=LVYR+/43Sj/8DM3dSpjNhxt8F+dtwUkdds+93KyhzLwqO2IUyCmXO3Z1FhwWpgRqSokhXN 8kXl9D/NukBJJl/Y+U2tgHUesWaGN7ZeLePHosUcXSjebTBrbkyKnWlD5WgRzQOyakaOzz /A/sChj3ZiFMUqMUf63hCj8eTNmgYQA= ARC-Authentication-Results: i=1; imf16.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=NQ3KvRSS; spf=pass (imf16.hostedemail.com: domain of vishal.moola@gmail.com designates 209.85.210.174 as permitted sender) smtp.mailfrom=vishal.moola@gmail.com; dmarc=pass (policy=none) header.from=gmail.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1666038296; a=rsa-sha256; cv=none; b=kwfShCKbL97dHoU5uCFgjB6g2DzMHzdL6UkuEZrIBDzGw8ExoqQ8NtGAIXvjMf54HkH6sT jjz8I723jsmNNhk5U19oZYgVI1Gqqht2X3BnRnKvpx0lUMr4DzyZ8vZdhTfPGFzvYDQxiR 01bRyWD0RcAbjnVVxBQzXBvwYGpeWwQ= Authentication-Results: imf16.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=NQ3KvRSS; spf=pass (imf16.hostedemail.com: domain of vishal.moola@gmail.com designates 209.85.210.174 as permitted sender) smtp.mailfrom=vishal.moola@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-Stat-Signature: o4jrpmm7qm3ug1zxyq79ayszacdu179w X-Rspamd-Queue-Id: 9DC5E18002B X-Rspam-User: X-Rspamd-Server: rspam04 X-HE-Tag: 1666038296-739740 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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) --- 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 -- 2.36.1