linux-kernel - [PATCH for-next 3/5] erofs: get rid of __stagingpage

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Date:   Tue, 8 Oct 2019 20:56:14 +0800
From:   Gao Xiang <gaoxiang25@...wei.com>
To:     Chao Yu <yuchao0@...wei.com>, <linux-erofs@...ts.ozlabs.org>
CC:     LKML <linux-kernel@...r.kernel.org>, Miao Xie <miaoxie@...wei.com>,
        "Li Guifu" <bluce.liguifu@...wei.com>,
        Gao Xiang <gaoxiang25@...wei.com>
Subject: [PATCH for-next 3/5] erofs: get rid of __stagingpage_alloc helper

Now open code is much cleaner due to iterative development.

Signed-off-by: Gao Xiang <gaoxiang25@...wei.com>
---
 fs/erofs/zdata.c | 19 +++++--------------
 1 file changed, 5 insertions(+), 14 deletions(-)

diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c
index 93f8bc1a64f6..e2a89aa921b1 100644
--- a/fs/erofs/zdata.c
+++ b/fs/erofs/zdata.c
@@ -546,15 +546,6 @@ static bool z_erofs_collector_end(struct z_erofs_collector *clt)
 	return true;
 }
 
-static inline struct page *__stagingpage_alloc(struct list_head *pagepool,
-					       gfp_t gfp)
-{
-	struct page *page = erofs_allocpage(pagepool, gfp, true);
-
-	page->mapping = Z_EROFS_MAPPING_STAGING;
-	return page;
-}
-
 static bool should_alloc_managed_pages(struct z_erofs_decompress_frontend *fe,
 				       unsigned int cachestrategy,
 				       erofs_off_t la)
@@ -661,8 +652,9 @@ static int z_erofs_do_read_page(struct z_erofs_decompress_frontend *fe,
 	/* should allocate an additional staging page for pagevec */
 	if (err == -EAGAIN) {
 		struct page *const newpage =
-			__stagingpage_alloc(pagepool, GFP_NOFS);
+			erofs_allocpage(pagepool, GFP_NOFS, true);
 
+		newpage->mapping = Z_EROFS_MAPPING_STAGING;
 		err = z_erofs_attach_page(clt, newpage,
 					  Z_EROFS_PAGE_TYPE_EXCLUSIVE);
 		if (!err)
@@ -1079,15 +1071,14 @@ static struct page *pickup_page_for_submission(struct z_erofs_pcluster *pcl,
 	unlock_page(page);
 	put_page(page);
 out_allocpage:
-	page = __stagingpage_alloc(pagepool, gfp);
+	page = erofs_allocpage(pagepool, gfp, true);
 	if (oldpage != cmpxchg(&pcl->compressed_pages[nr], oldpage, page)) {
 		list_add(&page->lru, pagepool);
 		cpu_relax();
 		goto repeat;
 	}
-	if (!tocache)
-		goto out;
-	if (add_to_page_cache_lru(page, mc, index + nr, gfp)) {
+
+	if (!tocache || add_to_page_cache_lru(page, mc, index + nr, gfp)) {
 		page->mapping = Z_EROFS_MAPPING_STAGING;
 		goto out;
 	}
-- 
2.17.1