X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fblock%2Frd.c;h=82f4eecc8699d19e42e899b043e2c45842cdbcc1;hb=444ad82bc3eaa554be40d22dc248e58aeefd54d9;hp=08176d23a46cd421690aca1d13a2edecf1499b71;hpb=347c53dca73fca317d57781f510f5ff4f6c0d0d7;p=linux-2.6

diff --git a/drivers/block/rd.c b/drivers/block/rd.c
index 08176d23a4..82f4eecc86 100644
--- a/drivers/block/rd.c
+++ b/drivers/block/rd.c
@@ -189,6 +189,18 @@ static int ramdisk_set_page_dirty(struct page *page)
 	return 0;
 }
 
+/*
+ * releasepage is called by pagevec_strip/try_to_release_page if
+ * buffers_heads_over_limit is true. Without a releasepage function
+ * try_to_free_buffers is called instead. That can unset the dirty
+ * bit of our ram disk pages, which will be eventually freed, even
+ * if the page is still in use.
+ */
+static int ramdisk_releasepage(struct page *page, gfp_t dummy)
+{
+	return 0;
+}
+
 static const struct address_space_operations ramdisk_aops = {
 	.readpage	= ramdisk_readpage,
 	.prepare_write	= ramdisk_prepare_write,
@@ -196,6 +208,7 @@ static const struct address_space_operations ramdisk_aops = {
 	.writepage	= ramdisk_writepage,
 	.set_page_dirty	= ramdisk_set_page_dirty,
 	.writepages	= ramdisk_writepages,
+	.releasepage	= ramdisk_releasepage,
 };
 
 static int rd_blkdev_pagecache_IO(int rw, struct bio_vec *vec, sector_t sector,
@@ -365,7 +378,7 @@ static int rd_open(struct inode *inode, struct file *filp)
 		/*
 		 * Deep badness.  rd_blkdev_pagecache_IO() needs to allocate
 		 * pagecache pages within a request_fn.  We cannot recur back
-		 * into the filesytem which is mounted atop the ramdisk, because
+		 * into the filesystem which is mounted atop the ramdisk, because
 		 * that would deadlock on fs locks.  And we really don't want
 		 * to reenter rd_blkdev_pagecache_IO when we're already within
 		 * that function.