linux-kernel - linux-next: manual merge of the kmap

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Date:	Thu, 15 Mar 2012 17:09:43 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Cong Wang <amwang@...hat.com>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	NeilBrown <neilb@...e.de>
Subject: linux-next: manual merge of the kmap_atomic tree with the md tree

Hi Cong,

Today's linux-next merge of the kmap_atomic tree got a conflict in
drivers/md/bitmap.c between commit 83a191d7b09d ("md/bitmap: remove some
pointless locking") from the md tree and commit 63716d51774d ("md: remove
the second argument of k[un]map_atomic()") from the kmap_atomic tree.

Just context changes.  I fixed it up (see below) and can carry the fix as
necessary.
-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

diff --cc drivers/md/bitmap.c
index cf5863c,045e086..0000000
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@@ -426,9 -451,13 +426,9 @@@ void bitmap_update_sb(struct bitmap *bi
  		return;
  	if (bitmap->mddev->bitmap_info.external)
  		return;
 -	spin_lock_irqsave(&bitmap->lock, flags);
 -	if (!bitmap->sb_page) { /* no superblock */
 -		spin_unlock_irqrestore(&bitmap->lock, flags);
 +	if (!bitmap->sb_page) /* no superblock */
  		return;
- 	sb = kmap_atomic(bitmap->sb_page, KM_USER0);
 -	}
 -	spin_unlock_irqrestore(&bitmap->lock, flags);
+ 	sb = kmap_atomic(bitmap->sb_page);
  	sb->events = cpu_to_le64(bitmap->mddev->events);
  	if (bitmap->mddev->events < bitmap->events_cleared)
  		/* rocking back to read-only */
@@@ -653,11 -680,16 +653,11 @@@ static int bitmap_mask_state(struct bit
  			     enum bitmap_mask_op op)
  {
  	bitmap_super_t *sb;
 -	unsigned long flags;
  	int old;
  
 -	spin_lock_irqsave(&bitmap->lock, flags);
 -	if (!bitmap->sb_page) { /* can't set the state */
 -		spin_unlock_irqrestore(&bitmap->lock, flags);
 +	if (!bitmap->sb_page) /* can't set the state */
  		return 0;
- 	sb = kmap_atomic(bitmap->sb_page, KM_USER0);
 -	}
 -	spin_unlock_irqrestore(&bitmap->lock, flags);
+ 	sb = kmap_atomic(bitmap->sb_page);
  	old = le32_to_cpu(sb->state) & bits;
  	switch (op) {
  	case MASK_SET:
@@@ -1034,13 -1066,13 +1034,13 @@@ static int bitmap_init_from_disk(struc
  			b = test_bit(bit, paddr);
  		else
  			b = test_bit_le(bit, paddr);
- 		kunmap_atomic(paddr, KM_USER0);
+ 		kunmap_atomic(paddr);
  		if (b) {
  			/* if the disk bit is set, set the memory bit */
 -			int needed = ((sector_t)(i+1) << (CHUNK_BLOCK_SHIFT(bitmap))
 +			int needed = ((sector_t)(i+1) << bitmap->chunkshift
  				      >= start);
  			bitmap_set_memory_bits(bitmap,
 -					       (sector_t)i << CHUNK_BLOCK_SHIFT(bitmap),
 +					       (sector_t)i << bitmap->chunkshift,
  					       needed);
  			bit_cnt++;
  		}

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