linux-kernel - [PATCH 1/3] fs: aio: use a folio in aio_setup

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Thu, 21 Mar 2024 16:27:31 +0800
From: Kefeng Wang <wangkefeng.wang@...wei.com>
To: Alexander Viro <viro@...iv.linux.org.uk>, Benjamin LaHaise
	<bcrl@...ck.org>, Christian Brauner <brauner@...nel.org>, Jan Kara
	<jack@...e.cz>, <linux-kernel@...r.kernel.org>, Matthew Wilcox
	<willy@...radead.org>
CC: <linux-aio@...ck.org>, <linux-fsdevel@...r.kernel.org>, Kefeng Wang
	<wangkefeng.wang@...wei.com>
Subject: [PATCH 1/3] fs: aio: use a folio in aio_setup_ring()

Use a folio throughout aio_setup_ring() to remove calls to compound_head().

Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
 fs/aio.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/fs/aio.c b/fs/aio.c
index 9cdaa2faa536..d7f6c8705016 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -527,17 +527,20 @@ static int aio_setup_ring(struct kioctx *ctx, unsigned int nr_events)
 	}
 
 	for (i = 0; i < nr_pages; i++) {
-		struct page *page;
-		page = find_or_create_page(file->f_mapping,
-					   i, GFP_USER | __GFP_ZERO);
-		if (!page)
+		struct folio *folio;
+
+		folio = __filemap_get_folio(file->f_mapping, i,
+					    FGP_LOCK | FGP_ACCESSED | FGP_CREAT,
+					    GFP_USER | __GFP_ZERO);
+		if (!folio)
 			break;
-		pr_debug("pid(%d) page[%d]->count=%d\n",
-			 current->pid, i, page_count(page));
-		SetPageUptodate(page);
-		unlock_page(page);
 
-		ctx->ring_pages[i] = page;
+		pr_debug("pid(%d) [%d] folio->count=%d\n", current->pid, i,
+			 folio_ref_count(folio));
+		folio_mark_uptodate(folio);
+		folio_unlock(folio);
+
+		ctx->ring_pages[i] = &folio->page;
 	}
 	ctx->nr_pages = i;
 
-- 
2.27.0