linux-kernel - [PATCH 13/17] reiser4: remove redundant read_mapping

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Date:	Wed, 11 Apr 2007 19:49:38 -0700
From:	Nate Diller <nate.diller@...il.com>
To:	Andrew Morton <akpm@...l.org>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Christoph Hellwig <hch@...radead.org>,
	Roman Zippel <zippel@...ux-m68k.org>,
	Mikulas Patocka <mikulas@...ax.karlin.mff.cuni.cz>,
	David Woodhouse <dwmw2@...radead.org>,
	Dave Kleikamp <shaggy@...tin.ibm.com>,
	Anton Altaparmakov <aia21@...tab.net>,
	Evgeniy Dushistov <dushistov@...l.ru>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	reiserfs-dev@...esys.com
Subject: [PATCH 13/17] reiser4: remove redundant read_mapping_page error checks

read_mapping_page() is now fully synchronous, so there's no need wait for
the page lock or check for I/O errors.

Signed-off-by: Nate Diller <nate.diller@...il.com>

---

diff -urpN -X dontdiff linux-2.6.21-rc6-mm1/fs/reiser4/plugin/file/tail_conversion.c linux-2.6.21-rc6-mm1-test/fs/reiser4/plugin/file/tail_conversion.c
--- linux-2.6.21-rc6-mm1/fs/reiser4/plugin/file/tail_conversion.c	2007-04-09 17:24:03.000000000 -0700
+++ linux-2.6.21-rc6-mm1-test/fs/reiser4/plugin/file/tail_conversion.c	2007-04-10 21:33:47.000000000 -0700
@@ -608,14 +608,6 @@ int extent2tail(unix_file_info_t *uf_inf
 			break;
 		}
 
-		wait_on_page_locked(page);
-
-		if (!PageUptodate(page)) {
-			page_cache_release(page);
-			result = RETERR(-EIO);
-			break;
-		}
-
 		/* cut part of file we have read */
 		start_byte = (__u64) (i << PAGE_CACHE_SHIFT);
 		set_key_offset(&from, start_byte);
diff -urpN -X dontdiff linux-2.6.21-rc6-mm1/fs/reiser4/plugin/item/extent_file_ops.c linux-2.6.21-rc6-mm1-test/fs/reiser4/plugin/item/extent_file_ops.c
--- linux-2.6.21-rc6-mm1/fs/reiser4/plugin/item/extent_file_ops.c	2007-04-10 19:41:14.000000000 -0700
+++ linux-2.6.21-rc6-mm1-test/fs/reiser4/plugin/item/extent_file_ops.c	2007-04-10 21:38:41.000000000 -0700
@@ -1220,15 +1220,8 @@ int reiser4_read_extent(struct file *fil
 		page = read_mapping_page(mapping, cur_page, file);
 		if (IS_ERR(page))
 			return PTR_ERR(page);
-		lock_page(page);
-		if (!PageUptodate(page)) {
-			unlock_page(page);
-			page_cache_release(page);
-			warning("jmacd-97178", "extent_read: page is not up to date");
-			return RETERR(-EIO);
-		}
+
 		mark_page_accessed(page);
-		unlock_page(page);
 
 		/* If users can be writing to this page using arbitrary virtual
 		   addresses, take care about potential aliasing before reading
-
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