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| author | Mark Tinguely <tinguely@sgi.com> | 2012-12-04 17:18:02 -0600 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2013-01-16 16:07:11 -0600 |
| commit | d44d9bc68e32ad5881b105f82bd259d261d1ef74 (patch) | |
| tree | 263045fc7f9efcaaa70e01cb4800193bc4aa1ce9 /fs/xfs/xfs_buf.h | |
| parent | a49f0d1ea3ec94fc7cf33a7c36a16343b74bd565 (diff) | |
| download | linux-stable-d44d9bc68e32ad5881b105f82bd259d261d1ef74.tar.gz linux-stable-d44d9bc68e32ad5881b105f82bd259d261d1ef74.tar.bz2 linux-stable-d44d9bc68e32ad5881b105f82bd259d261d1ef74.zip | |
xfs: use b_maps[] for discontiguous buffers
Commits starting at 77c1a08 introduced a multiple segment support
to xfs_buf. xfs_trans_buf_item_match() could not find a multi-segment
buffer in the transaction because it was looking at the single segment
block number rather than the multi-segment b_maps[0].bm.bn. This
results on a recursive buffer lock that can never be satisfied.
This patch:
1) Changed the remaining b_map accesses to be b_maps[0] accesses.
2) Renames the single segment b_map structure to __b_map to avoid
future confusion.
Signed-off-by: Mark Tinguely <tinguely@sgi.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_buf.h')
| -rw-r--r-- | fs/xfs/xfs_buf.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h index 23f5642480bb..433a12ed7b17 100644 --- a/fs/xfs/xfs_buf.h +++ b/fs/xfs/xfs_buf.h @@ -151,7 +151,7 @@ typedef struct xfs_buf { struct page **b_pages; /* array of page pointers */ struct page *b_page_array[XB_PAGES]; /* inline pages */ struct xfs_buf_map *b_maps; /* compound buffer map */ - struct xfs_buf_map b_map; /* inline compound buffer map */ + struct xfs_buf_map __b_map; /* inline compound buffer map */ int b_map_count; int b_io_length; /* IO size in BBs */ atomic_t b_pin_count; /* pin count */ @@ -330,8 +330,8 @@ void xfs_buf_stale(struct xfs_buf *bp); * In future, uncached buffers will pass the block number directly to the io * request function and hence these macros will go away at that point. */ -#define XFS_BUF_ADDR(bp) ((bp)->b_map.bm_bn) -#define XFS_BUF_SET_ADDR(bp, bno) ((bp)->b_map.bm_bn = (xfs_daddr_t)(bno)) +#define XFS_BUF_ADDR(bp) ((bp)->b_maps[0].bm_bn) +#define XFS_BUF_SET_ADDR(bp, bno) ((bp)->b_maps[0].bm_bn = (xfs_daddr_t)(bno)) static inline void xfs_buf_set_ref(struct xfs_buf *bp, int lru_ref) { |