fs/buffer: clean up block_commit_write

Originally inode is used to get blksize, after commit 45bce8f3
("fs/buffer.c: make block-size be per-page and protected by the page
lock"), __block_commit_write no longer uses this parameter inode.

[akpm@linux-foundation.org: remove now-unused local `inode']
Link: https://lkml.kernel.org/r/20230626055518.842392-2-beanhuo@iokpp.deSigned-off-by: Bean Huo <beanhuo@micron.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Luís Henriques <ocfs2-devel@oss.oracle.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

fs/buffer.c

@@ -2180,8 +2180,7 @@ int __block_write_begin(struct page *page, loff_t pos, unsigned len,
 }
 EXPORT_SYMBOL(__block_write_begin);
 
-static int __block_commit_write(struct inode *inode, struct folio *folio,
-		size_t from, size_t to)
+static int __block_commit_write(struct folio *folio, size_t from, size_t to)
 {
 	size_t block_start, block_end;
 	bool partial = false;
@@ -2253,7 +2252,6 @@ int block_write_end(struct file *file, struct address_space *mapping,
 			struct page *page, void *fsdata)
 {
 	struct folio *folio = page_folio(page);
-	struct inode *inode = mapping->host;
 	size_t start = pos - folio_pos(folio);
 
 	if (unlikely(copied < len)) {
@@ -2277,7 +2275,7 @@ int block_write_end(struct file *file, struct address_space *mapping,
 	flush_dcache_folio(folio);
 
 	/* This could be a short (even 0-length) commit */
-	__block_commit_write(inode, folio, start, start + copied);
+	__block_commit_write(folio, start, start + copied);
 
 	return copied;
 }
@@ -2601,8 +2599,7 @@ EXPORT_SYMBOL(cont_write_begin);
 int block_commit_write(struct page *page, unsigned from, unsigned to)
 {
 	struct folio *folio = page_folio(page);
-	struct inode *inode = folio->mapping->host;
-	__block_commit_write(inode, folio, from, to);
+	__block_commit_write(folio, from, to);
 	return 0;
 }
 EXPORT_SYMBOL(block_commit_write);
@@ -2650,7 +2647,7 @@ int block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
 
 	ret = __block_write_begin_int(folio, 0, end, get_block, NULL);
 	if (!ret)
-		ret = __block_commit_write(inode, folio, 0, end);
+		ret = __block_commit_write(folio, 0, end);
 
 	if (unlikely(ret < 0))
 		goto out_unlock;