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| author | Alex Elder <aelder@sgi.com> | 2010-04-20 17:10:21 +1000 |
|---|---|---|
| committer | Alex Elder <aelder@sgi.com> | 2010-05-19 09:58:16 -0500 |
| commit | 48389ef17583f2214bbd2c119b3015677419c16b (patch) | |
| tree | ff6b8e0cf45cb4e32e77a6ae0a9fa18c845a5ca3 /fs | |
| parent | 69ce58f08a3c455ff74cfcde90e9ab267d67f636 (diff) | |
| download | lwn-48389ef17583f2214bbd2c119b3015677419c16b.tar.gz lwn-48389ef17583f2214bbd2c119b3015677419c16b.zip | |
xfs: kill off l_sectbb_mask
There remains only one user of the l_sectbb_mask field in the log
structure. Just kill it off and compute the mask where needed from
the power-of-2 sector size.
(Only update from last post is to accomodate the changes in the
previous patch in the series.)
Signed-off-by: Alex Elder <aelder@sgi.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/xfs/xfs_log.c | 1 | ||||
| -rw-r--r-- | fs/xfs/xfs_log_priv.h | 4 | ||||
| -rw-r--r-- | fs/xfs/xfs_log_recover.c | 14 |
3 files changed, 10 insertions, 9 deletions
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 36e09e362f7f..3038dd52c72a 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -1089,7 +1089,6 @@ xlog_alloc_log(xfs_mount_t *mp, } } log->l_sectBBsize = 1 << log2_size; - log->l_sectbb_mask = log->l_sectBBsize - 1; xlog_get_iclog_buffer_size(mp, log); diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index 56f221d7bf61..9cf695154451 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -396,9 +396,7 @@ typedef struct log { struct xfs_buf_cancel **l_buf_cancel_table; int l_iclog_hsize; /* size of iclog header */ int l_iclog_heads; /* # of iclog header sectors */ - uint l_sectBBsize; /* sector size in BBs */ - uint l_sectbb_mask; /* sector size (in BBs) - * alignment mask */ + uint l_sectBBsize; /* sector size in BBs (2^n) */ int l_iclog_size; /* size of log in bytes */ int l_iclog_size_log; /* log power size of log */ int l_iclog_bufs; /* number of iclog buffers */ diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index f1220ec1896f..0de08e366315 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -121,6 +121,10 @@ xlog_put_bp( xfs_buf_free(bp); } +/* + * Return the address of the start of the given block number's data + * in a log buffer. The buffer covers a log sector-aligned region. + */ STATIC xfs_caddr_t xlog_align( xlog_t *log, @@ -128,14 +132,14 @@ xlog_align( int nbblks, xfs_buf_t *bp) { + xfs_daddr_t offset; xfs_caddr_t ptr; - if (log->l_sectBBsize == 1) - return XFS_BUF_PTR(bp); + offset = blk_no & ((xfs_daddr_t) log->l_sectBBsize - 1); + ptr = XFS_BUF_PTR(bp) + BBTOB(offset); + + ASSERT(ptr + BBTOB(nbblks) <= XFS_BUF_PTR(bp) + XFS_BUF_SIZE(bp)); - ptr = XFS_BUF_PTR(bp) + BBTOB((int)blk_no & log->l_sectbb_mask); - ASSERT(XFS_BUF_SIZE(bp) >= - BBTOB(nbblks + (blk_no & log->l_sectbb_mask))); return ptr; } |