linux-kernel - [PATCH 5/8] erofs: drop z_erofs_page_mark

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Message-Id: <20230817082813.81180-5-hsiangkao@linux.alibaba.com>
Date:   Thu, 17 Aug 2023 16:28:10 +0800
From:   Gao Xiang <hsiangkao@...ux.alibaba.com>
To:     linux-erofs@...ts.ozlabs.org
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Gao Xiang <hsiangkao@...ux.alibaba.com>
Subject: [PATCH 5/8] erofs: drop z_erofs_page_mark_eio()

It can be folded into z_erofs_onlinepage_endio() to simplify the code.

Signed-off-by: Gao Xiang <hsiangkao@...ux.alibaba.com>
---
 fs/erofs/zdata.c | 29 +++++++++--------------------
 1 file changed, 9 insertions(+), 20 deletions(-)

diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c
index a200e99f7d4f..4009283944ca 100644
--- a/fs/erofs/zdata.c
+++ b/fs/erofs/zdata.c
@@ -143,22 +143,17 @@ static inline void z_erofs_onlinepage_split(struct page *page)
 	atomic_inc((atomic_t *)&page->private);
 }
 
-static inline void z_erofs_page_mark_eio(struct page *page)
+static void z_erofs_onlinepage_endio(struct page *page, int err)
 {
-	int orig;
+	int orig, v;
+
+	DBG_BUGON(!PagePrivate(page));
 
 	do {
 		orig = atomic_read((atomic_t *)&page->private);
-	} while (atomic_cmpxchg((atomic_t *)&page->private, orig,
-				orig | Z_EROFS_PAGE_EIO) != orig);
-}
-
-static inline void z_erofs_onlinepage_endio(struct page *page)
-{
-	unsigned int v;
+		v = (orig - 1) | (err ? Z_EROFS_PAGE_EIO : 0);
+	} while (atomic_cmpxchg((atomic_t *)&page->private, orig, v) != orig);
 
-	DBG_BUGON(!PagePrivate(page));
-	v = atomic_dec_return((atomic_t *)&page->private);
 	if (!(v & ~Z_EROFS_PAGE_EIO)) {
 		set_page_private(page, 0);
 		ClearPagePrivate(page);
@@ -1066,9 +1061,7 @@ static int z_erofs_do_read_page(struct z_erofs_decompress_frontend *fe,
 		goto repeat;
 
 out:
-	if (err)
-		z_erofs_page_mark_eio(page);
-	z_erofs_onlinepage_endio(page);
+	z_erofs_onlinepage_endio(page, err);
 	return err;
 }
 
@@ -1171,9 +1164,7 @@ static void z_erofs_fill_other_copies(struct z_erofs_decompress_backend *be,
 			cur += len;
 		}
 		kunmap_local(dst);
-		if (err)
-			z_erofs_page_mark_eio(bvi->bvec.page);
-		z_erofs_onlinepage_endio(bvi->bvec.page);
+		z_erofs_onlinepage_endio(bvi->bvec.page, err);
 		list_del(p);
 		kfree(bvi);
 	}
@@ -1344,9 +1335,7 @@ static int z_erofs_decompress_pcluster(struct z_erofs_decompress_backend *be,
 		/* recycle all individual short-lived pages */
 		if (z_erofs_put_shortlivedpage(be->pagepool, page))
 			continue;
-		if (err)
-			z_erofs_page_mark_eio(page);
-		z_erofs_onlinepage_endio(page);
+		z_erofs_onlinepage_endio(page, err);
 	}
 
 	if (be->decompressed_pages != be->onstack_pages)
-- 
2.24.4