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authorNeilBrown <neilb@suse.de>2012-05-22 13:55:09 +1000
committerNeilBrown <neilb@suse.de>2012-05-22 13:55:09 +1000
commitd189122d4bca2647441fdc170dc6d4cc5c8bb2fa (patch)
treed5907014aaef1be959b93d0fb4a327e11673f855 /drivers/md
parent27581e5ae01f77b5472dc5c2368b41063fed7f37 (diff)
downloadop-kernel-dev-d189122d4bca2647441fdc170dc6d4cc5c8bb2fa.zip
op-kernel-dev-d189122d4bca2647441fdc170dc6d4cc5c8bb2fa.tar.gz
md/bitmap: change *_page_attr() to take a page number, not a page.
Most often we have the page number, not the page. And that is what the *_page_attr() functions really want. So change the arguments to take that number. Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/bitmap.c55
1 files changed, 26 insertions, 29 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index 324a198..511f0ed 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -800,22 +800,22 @@ enum bitmap_page_attr {
BITMAP_PAGE_NEEDWRITE = 2, /* there are cleared bits that need to be synced */
};
-static inline void set_page_attr(struct bitmap *bitmap, struct page *page,
- enum bitmap_page_attr attr)
+static inline void set_page_attr(struct bitmap *bitmap, int pnum,
+ enum bitmap_page_attr attr)
{
- __set_bit((page->index<<2) + attr, bitmap->filemap_attr);
+ __set_bit((pnum<<2) + attr, bitmap->filemap_attr);
}
-static inline void clear_page_attr(struct bitmap *bitmap, struct page *page,
- enum bitmap_page_attr attr)
+static inline void clear_page_attr(struct bitmap *bitmap, int pnum,
+ enum bitmap_page_attr attr)
{
- __clear_bit((page->index<<2) + attr, bitmap->filemap_attr);
+ __clear_bit((pnum<<2) + attr, bitmap->filemap_attr);
}
-static inline unsigned long test_page_attr(struct bitmap *bitmap, struct page *page,
+static inline unsigned long test_page_attr(struct bitmap *bitmap, int pnum,
enum bitmap_page_attr attr)
{
- return test_bit((page->index<<2) + attr, bitmap->filemap_attr);
+ return test_bit((pnum<<2) + attr, bitmap->filemap_attr);
}
/*
@@ -846,7 +846,7 @@ static void bitmap_file_set_bit(struct bitmap *bitmap, sector_t block)
kunmap_atomic(kaddr);
pr_debug("set file bit %lu page %lu\n", bit, page->index);
/* record page number so it gets flushed to disk when unplug occurs */
- set_page_attr(bitmap, page, BITMAP_PAGE_DIRTY);
+ set_page_attr(bitmap, page->index, BITMAP_PAGE_DIRTY);
}
static void bitmap_file_clear_bit(struct bitmap *bitmap, sector_t block)
@@ -866,8 +866,8 @@ static void bitmap_file_clear_bit(struct bitmap *bitmap, sector_t block)
else
__clear_bit_le(bit, paddr);
kunmap_atomic(paddr);
- if (!test_page_attr(bitmap, page, BITMAP_PAGE_NEEDWRITE)) {
- set_page_attr(bitmap, page, BITMAP_PAGE_PENDING);
+ if (!test_page_attr(bitmap, page->index, BITMAP_PAGE_NEEDWRITE)) {
+ set_page_attr(bitmap, page->index, BITMAP_PAGE_PENDING);
bitmap->allclean = 0;
}
}
@@ -879,7 +879,6 @@ void bitmap_unplug(struct bitmap *bitmap)
{
unsigned long i, flags;
int dirty, need_write;
- struct page *page;
int wait = 0;
if (!bitmap || !bitmap->filemap)
@@ -893,19 +892,18 @@ void bitmap_unplug(struct bitmap *bitmap)
spin_unlock_irqrestore(&bitmap->lock, flags);
return;
}
- page = bitmap->filemap[i];
- dirty = test_page_attr(bitmap, page, BITMAP_PAGE_DIRTY);
- need_write = test_page_attr(bitmap, page, BITMAP_PAGE_NEEDWRITE);
- clear_page_attr(bitmap, page, BITMAP_PAGE_DIRTY);
- clear_page_attr(bitmap, page, BITMAP_PAGE_NEEDWRITE);
+ dirty = test_page_attr(bitmap, i, BITMAP_PAGE_DIRTY);
+ need_write = test_page_attr(bitmap, i, BITMAP_PAGE_NEEDWRITE);
+ clear_page_attr(bitmap, i, BITMAP_PAGE_DIRTY);
+ clear_page_attr(bitmap, i, BITMAP_PAGE_NEEDWRITE);
if (dirty || need_write)
- clear_page_attr(bitmap, page, BITMAP_PAGE_PENDING);
+ clear_page_attr(bitmap, i, BITMAP_PAGE_PENDING);
if (dirty)
wait = 1;
spin_unlock_irqrestore(&bitmap->lock, flags);
if (dirty || need_write)
- write_page(bitmap, page, 0);
+ write_page(bitmap, bitmap->filemap[i], 0);
}
if (wait) { /* if any writes were performed, we need to wait on them */
if (bitmap->file)
@@ -1101,7 +1099,7 @@ void bitmap_write_all(struct bitmap *bitmap)
spin_lock_irq(&bitmap->lock);
for (i = 0; i < bitmap->file_pages; i++)
- set_page_attr(bitmap, bitmap->filemap[i],
+ set_page_attr(bitmap, i,
BITMAP_PAGE_NEEDWRITE);
bitmap->allclean = 0;
spin_unlock_irq(&bitmap->lock);
@@ -1168,11 +1166,11 @@ void bitmap_daemon_work(struct mddev *mddev)
*/
spin_lock_irqsave(&bitmap->lock, flags);
for (j = 0; j < bitmap->file_pages; j++)
- if (test_page_attr(bitmap, bitmap->filemap[j],
+ if (test_page_attr(bitmap, j,
BITMAP_PAGE_PENDING)) {
- set_page_attr(bitmap, bitmap->filemap[j],
+ set_page_attr(bitmap, j,
BITMAP_PAGE_NEEDWRITE);
- clear_page_attr(bitmap, bitmap->filemap[j],
+ clear_page_attr(bitmap, j,
BITMAP_PAGE_PENDING);
}
@@ -1187,7 +1185,7 @@ void bitmap_daemon_work(struct mddev *mddev)
sb->events_cleared =
cpu_to_le64(bitmap->events_cleared);
kunmap_atomic(sb);
- set_page_attr(bitmap, bitmap->sb_page,
+ set_page_attr(bitmap, 0,
BITMAP_PAGE_NEEDWRITE);
}
}
@@ -1236,18 +1234,17 @@ void bitmap_daemon_work(struct mddev *mddev)
* We mustn't write any other blocks before the superblock.
*/
for (j = 0; j < bitmap->file_pages; j++) {
- struct page *page = bitmap->filemap[j];
- if (test_page_attr(bitmap, page,
+ if (test_page_attr(bitmap, j,
BITMAP_PAGE_DIRTY))
/* bitmap_unplug will handle the rest */
break;
- if (test_page_attr(bitmap, page,
+ if (test_page_attr(bitmap, j,
BITMAP_PAGE_NEEDWRITE)) {
- clear_page_attr(bitmap, page,
+ clear_page_attr(bitmap, j,
BITMAP_PAGE_NEEDWRITE);
spin_unlock_irqrestore(&bitmap->lock, flags);
- write_page(bitmap, page, 0);
+ write_page(bitmap, bitmap->filemap[j], 0);
spin_lock_irqsave(&bitmap->lock, flags);
if (!bitmap->filemap)
break;
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