X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=fs%2Fmpage.c;h=dbcc7af76a15d483a5efc5c1a68aa11566072623;hb=17a172fe112a15dc9cd694d84983c51e1dc6bf34;hp=d54f8f8972242a62e437bc904059773d2c697e6d;hpb=f563d53c30f3e60cde3a194cc1a87284ee0b3366;p=linux-2.6-omap-h63xx.git

diff --git a/fs/mpage.c b/fs/mpage.c
index d54f8f89722..dbcc7af76a1 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -82,7 +82,7 @@ static void mpage_end_io_write(struct bio *bio, int err)
 	bio_put(bio);
 }
 
-static struct bio *mpage_bio_submit(int rw, struct bio *bio)
+struct bio *mpage_bio_submit(int rw, struct bio *bio)
 {
 	bio->bi_end_io = mpage_end_io_read;
 	if (rw == WRITE)
@@ -90,6 +90,7 @@ static struct bio *mpage_bio_submit(int rw, struct bio *bio)
 	submit_bio(rw, bio);
 	return NULL;
 }
+EXPORT_SYMBOL(mpage_bio_submit);
 
 static struct bio *
 mpage_alloc(struct block_device *bdev,
@@ -276,9 +277,7 @@ do_mpage_readpage(struct bio *bio, struct page *page, unsigned nr_pages,
 	}
 
 	if (first_hole != blocks_per_page) {
-		zero_user_page(page, first_hole << blkbits,
-				PAGE_CACHE_SIZE - (first_hole << blkbits),
-				KM_USER0);
+		zero_user_segment(page, first_hole << blkbits, PAGE_CACHE_SIZE);
 		if (first_hole == 0) {
 			SetPageUptodate(page);
 			unlock_page(page);
@@ -327,16 +326,12 @@ confused:
 }
 
 /**
- * mpage_readpages - populate an address space with some pages, and
- *                       start reads against them.
- *
+ * mpage_readpages - populate an address space with some pages & start reads against them
  * @mapping: the address_space
  * @pages: The address of a list_head which contains the target pages.  These
  *   pages have their ->index populated and are otherwise uninitialised.
- *
  *   The page at @pages->prev has the lowest file offset, and reads should be
  *   issued in @pages->prev to @pages->next order.
- *
  * @nr_pages: The number of pages at *@pages
  * @get_block: The filesystem's block mapper function.
  *
@@ -362,6 +357,7 @@ confused:
  * So an mpage read of the first 16 blocks of an ext2 file will cause I/O to be
  * submitted in the following order:
  * 	12 0 1 2 3 4 5 6 7 8 9 10 11 13 14 15 16
+ *
  * because the indirect block has to be read to get the mappings of blocks
  * 13,14,15,16.  Obviously, this impacts performance.
  *
@@ -440,15 +436,9 @@ EXPORT_SYMBOL(mpage_readpage);
  * written, so it can intelligently allocate a suitably-sized BIO.  For now,
  * just allocate full-size (16-page) BIOs.
  */
-struct mpage_data {
-	struct bio *bio;
-	sector_t last_block_in_bio;
-	get_block_t *get_block;
-	unsigned use_writepage;
-};
 
-static int __mpage_writepage(struct page *page, struct writeback_control *wbc,
-			     void *data)
+int __mpage_writepage(struct page *page, struct writeback_control *wbc,
+		      void *data)
 {
 	struct mpage_data *mpd = data;
 	struct bio *bio = mpd->bio;
@@ -571,8 +561,7 @@ page_is_mapped:
 
 		if (page->index > end_index || !offset)
 			goto confused;
-		zero_user_page(page, offset, PAGE_CACHE_SIZE - offset,
-				KM_USER0);
+		zero_user_segment(page, offset, PAGE_CACHE_SIZE);
 	}
 
 	/*
@@ -657,11 +646,10 @@ out:
 	mpd->bio = bio;
 	return ret;
 }
+EXPORT_SYMBOL(__mpage_writepage);
 
 /**
- * mpage_writepages - walk the list of dirty pages of the given
- * address space and writepage() all of them.
- * 
+ * mpage_writepages - walk the list of dirty pages of the given address space & writepage() all of them
  * @mapping: address space structure to write
  * @wbc: subtract the number of written pages from *@wbc->nr_to_write
  * @get_block: the filesystem's block mapper function.