linux-kernel - [PATCH 02/14] fs: define filler

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Message-Id: <20201007010603.3452458-3-jglisse@redhat.com>
Date:   Tue,  6 Oct 2020 21:05:51 -0400
From:   jglisse@...hat.com
To:     linux-kernel@...r.kernel.org
Cc:     Jérôme Glisse <jglisse@...hat.com>,
        linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Tejun Heo <tj@...nel.org>, Jan Kara <jack@...e.cz>,
        Josef Bacik <jbacik@...com>
Subject: [PATCH 02/14] fs: define filler_t as a function pointer type

From: Jérôme Glisse <jglisse@...hat.com>

Coccinelle is confuse by filler_t not being a regular function pointer
type. As they are no reason to define filler_t as a non pointer type
redefine it as a function pointer type and update function prototype
accordingly.

Signed-off-by: Jérôme Glisse <jglisse@...hat.com>
Cc: linux-mm@...ck.org
Cc: linux-fsdevel@...r.kernel.org
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Alexander Viro <viro@...iv.linux.org.uk>
Cc: linux-fsdevel@...r.kernel.org
Cc: Tejun Heo <tj@...nel.org>
Cc: Jan Kara <jack@...e.cz>
Cc: Josef Bacik <jbacik@...com>
---
 fs/nfs/dir.c            | 2 +-
 fs/nfs/symlink.c        | 4 ++--
 include/linux/pagemap.h | 6 +++---
 mm/filemap.c            | 5 ++---
 mm/readahead.c          | 2 +-
 5 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index cb52db9a0cfb7..da1fe71ae810d 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -740,7 +740,7 @@ static
 struct page *get_cache_page(nfs_readdir_descriptor_t *desc)
 {
 	return read_cache_page(desc->file->f_mapping, desc->page_index,
-			nfs_readdir_filler, desc);
+			(filler_t)nfs_readdir_filler, desc);
 }
 
 /*
diff --git a/fs/nfs/symlink.c b/fs/nfs/symlink.c
index 25ba299fdac2e..76691d94ae5f8 100644
--- a/fs/nfs/symlink.c
+++ b/fs/nfs/symlink.c
@@ -66,8 +66,8 @@ static const char *nfs_get_link(struct dentry *dentry,
 		err = ERR_PTR(nfs_revalidate_mapping(inode, inode->i_mapping));
 		if (err)
 			return err;
-		page = read_cache_page(&inode->i_data, 0, nfs_symlink_filler,
-				inode);
+		page = read_cache_page(&inode->i_data, 0,
+				(filler_t)nfs_symlink_filler, inode);
 		if (IS_ERR(page))
 			return ERR_CAST(page);
 	}
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 7de11dcd534d6..9acfc605b3bc3 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -264,7 +264,7 @@ static inline gfp_t readahead_gfp_mask(struct address_space *x)
 	return mapping_gfp_mask(x) | __GFP_NORETRY | __GFP_NOWARN;
 }
 
-typedef int filler_t(void *, struct page *);
+typedef int (*filler_t)(void *, struct page *);
 
 pgoff_t page_cache_next_miss(struct address_space *mapping,
 			     pgoff_t index, unsigned long max_scan);
@@ -425,11 +425,11 @@ static inline struct page *grab_cache_page(struct address_space *mapping,
 }
 
 extern struct page * read_cache_page(struct address_space *mapping,
-				pgoff_t index, filler_t *filler, void *data);
+				pgoff_t index, filler_t filler, void *data);
 extern struct page * read_cache_page_gfp(struct address_space *mapping,
 				pgoff_t index, gfp_t gfp_mask);
 extern int read_cache_pages(struct address_space *mapping,
-		struct list_head *pages, filler_t *filler, void *data);
+		struct list_head *pages, filler_t filler, void *data);
 
 static inline struct page *read_mapping_page(struct address_space *mapping,
 				pgoff_t index, void *data)
diff --git a/mm/filemap.c b/mm/filemap.c
index 99c49eeae71b8..2cdbbffc55522 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2942,8 +2942,7 @@ static struct page *wait_on_page_read(struct page *page)
 }
 
 static struct page *do_read_cache_page(struct address_space *mapping,
-				pgoff_t index,
-				int (*filler)(void *, struct page *),
+				pgoff_t index, filler_t filler,
 				void *data,
 				gfp_t gfp)
 {
@@ -3064,7 +3063,7 @@ static struct page *do_read_cache_page(struct address_space *mapping,
  */
 struct page *read_cache_page(struct address_space *mapping,
 				pgoff_t index,
-				int (*filler)(void *, struct page *),
+				filler_t filler,
 				void *data)
 {
 	return do_read_cache_page(mapping, index, filler, data,
diff --git a/mm/readahead.c b/mm/readahead.c
index 3c9a8dd7c56c8..cd67c9cfa931a 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -87,7 +87,7 @@ static void read_cache_pages_invalidate_pages(struct address_space *mapping,
  * Returns: %0 on success, error return by @filler otherwise
  */
 int read_cache_pages(struct address_space *mapping, struct list_head *pages,
-			int (*filler)(void *, struct page *), void *data)
+			filler_t filler, void *data)
 {
 	struct page *page;
 	int ret = 0;
-- 
2.26.2