Re: [f2fs-dev] [PATCH 5/6] f2fs: use fscrypt_finalize_bounce_page() for cleanup

On 6/15/26 13:11, Matthew Wilcox wrote:
> On Mon, Jun 15, 2026 at 09:08:21PM +0800, Chao Yu wrote:
>> No logic changes.
> 
> This seems like a step backwards.  We should be looking to convert to
> a future fscrypt_finalize_bounce_folio(), if anything.

You're right, what do you think of this?

 From 533ee72170c2ad451097db926dd713d9fea442f9 Mon Sep 17 00:00:00 2001
From: Chao Yu <[email protected]>
Date: Fri, 26 Sep 2025 01:43:06 +0800
Subject: [PATCH] fscrypt,f2fs: introduce fscrypt_finalize_bounce_folio() for
  cleanup

As part of the linux kernel's migration to folio-based APIs, introduce
fscrypt_finalize_bounce_folio() as the folio equivalent of
fscrypt_finalize_bounce_page(), and clean up f2fs codes with this new
helper.

Suggested-by: Matthew Wilcox <[email protected]>
Cc: Eric Biggers <[email protected]>
Signed-off-by: Chao Yu <[email protected]>
---
  fs/f2fs/data.c          |  7 +------
  include/linux/fscrypt.h | 11 +++++++++++
  2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index ac1cf4de3d62..e0fca6c60e34 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -362,12 +362,7 @@ static void f2fs_write_end_bio(struct bio *bio)
  		struct folio *folio = fi.folio;
  		enum count_type type;

-		if (fscrypt_is_bounce_folio(folio)) {
-			struct folio *io_folio = folio;
-
-			folio = fscrypt_pagecache_folio(io_folio);
-			fscrypt_free_bounce_page(&io_folio->page);
-		}
+		fscrypt_finalize_bounce_folio(&folio);

  #ifdef CONFIG_F2FS_FS_COMPRESSION
  		if (f2fs_is_compressed_page(folio)) {
diff --git a/include/linux/fscrypt.h b/include/linux/fscrypt.h
index 54712ec61ffb..20b59b021c94 100644
--- a/include/linux/fscrypt.h
+++ b/include/linux/fscrypt.h
@@ -1132,4 +1132,15 @@ static inline void fscrypt_finalize_bounce_page(struct page **pagep)
  	}
  }

+/* If *foliop is a bounce folio, free it and set *foliop to the pagecache folio */
+static inline void fscrypt_finalize_bounce_folio(struct folio **foliop)
+{
+	struct folio *folio = *foliop;
+
+	if (fscrypt_is_bounce_folio(folio)) {
+		*foliop = fscrypt_pagecache_folio(folio);
+		fscrypt_free_bounce_page(&folio->page);
+	}
+}
+
  #endif	/* _LINUX_FSCRYPT_H */
-- 
2.49.0



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