When looking for pages that need cleaning we skip pages that
don't have BITMAP_PAGE_CLEAN set. But if it is the 'current'
page we will have cleared that bit ourselves, so skipping it is wrong.
So: move the 'skip this page' inside 'if page != lastpage'.
Also fold call of file_page_offset into the one place where
the value (bit) is used.
Signed-off-by: Neil Brown <neilb@xxxxxxxxxxxxxxx>
### Diffstat output
./drivers/md/bitmap.c | 35 +++++++++++++++++------------------
1 files changed, 17 insertions(+), 18 deletions(-)
diff ./drivers/md/bitmap.c~current~ ./drivers/md/bitmap.c
--- ./drivers/md/bitmap.c~current~ 2005-03-22 17:20:08.000000000 +1100
+++ ./drivers/md/bitmap.c 2005-03-22 17:20:50.000000000 +1100
@@ -908,7 +908,7 @@ static bitmap_counter_t *bitmap_get_coun
int bitmap_daemon_work(struct bitmap *bitmap)
{
- unsigned long bit, j;
+ unsigned long j;
unsigned long flags;
struct page *page = NULL, *lastpage = NULL;
int err = 0;
@@ -931,24 +931,23 @@ int bitmap_daemon_work(struct bitmap *bi
}
page = filemap_get_page(bitmap, j);
- /* skip this page unless it's marked as needing cleaning */
- if (!((attr=get_page_attr(bitmap, page)) & BITMAP_PAGE_CLEAN)) {
- if (attr & BITMAP_PAGE_NEEDWRITE) {
- page_cache_get(page);
- clear_page_attr(bitmap, page, BITMAP_PAGE_NEEDWRITE);
- }
- spin_unlock_irqrestore(&bitmap->lock, flags);
- if (attr & BITMAP_PAGE_NEEDWRITE) {
- if (write_page(bitmap, page, 0))
- bitmap_file_kick(bitmap);
- page_cache_release(page);
- }
- continue;
- }
-
- bit = file_page_offset(j);
if (page != lastpage) {
+ /* skip this page unless it's marked as needing cleaning */
+ if (!((attr=get_page_attr(bitmap, page)) & BITMAP_PAGE_CLEAN)) {
+ if (attr & BITMAP_PAGE_NEEDWRITE) {
+ page_cache_get(page);
+ clear_page_attr(bitmap, page, BITMAP_PAGE_NEEDWRITE);
+ }
+ spin_unlock_irqrestore(&bitmap->lock, flags);
+ if (attr & BITMAP_PAGE_NEEDWRITE) {
+ if (write_page(bitmap, page, 0))
+ bitmap_file_kick(bitmap);
+ page_cache_release(page);
+ }
+ continue;
+ }
+
/* grab the new page, sync and release the old */
page_cache_get(page);
if (lastpage != NULL) {
@@ -990,7 +989,7 @@ int bitmap_daemon_work(struct bitmap *bi
-1);
/* clear the bit */
- clear_bit(bit, page_address(page));
+ clear_bit(file_page_offset(j), page_address(page));
}
}
spin_unlock_irqrestore(&bitmap->lock, flags);
-
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