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| author | Dave Chinner <dchinner@redhat.com> | 2010-09-22 02:47:20 +0200 |
|---|---|---|
| committer | Alex Elder <aelder@sgi.com> | 2010-10-18 22:07:48 +0200 |
| commit | ebad861b5702c3e2332a3e906978f47144d22f70 (patch) | |
| tree | 7b4502277c46d26d1d26258d05596b58ab6b868a /fs/xfs/linux-2.6/xfs_buf.h | |
| parent | xfs: introduced uncached buffer read primitve (diff) | |
| download | linux-ebad861b5702c3e2332a3e906978f47144d22f70.tar.xz linux-ebad861b5702c3e2332a3e906978f47144d22f70.zip | |
xfs: store xfs_mount in the buftarg instead of in the xfs_buf
Each buffer contains both a buftarg pointer and a mount pointer. If
we add a mount pointer into the buftarg, we can avoid needing the
b_mount field in every buffer and grab it from the buftarg when
needed instead. This shrinks the xfs_buf by 8 bytes.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs/xfs/linux-2.6/xfs_buf.h')
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_buf.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/xfs/linux-2.6/xfs_buf.h b/fs/xfs/linux-2.6/xfs_buf.h index 57eedc750ee6..def2cea2b4d6 100644 --- a/fs/xfs/linux-2.6/xfs_buf.h +++ b/fs/xfs/linux-2.6/xfs_buf.h @@ -132,6 +132,7 @@ typedef struct xfs_buftarg { dev_t bt_dev; struct block_device *bt_bdev; struct address_space *bt_mapping; + struct xfs_mount *bt_mount; unsigned int bt_bsize; unsigned int bt_sshift; size_t bt_smask; @@ -189,7 +190,6 @@ typedef struct xfs_buf { struct completion b_iowait; /* queue for I/O waiters */ void *b_fspriv; void *b_fspriv2; - struct xfs_mount *b_mount; unsigned short b_error; /* error code on I/O */ unsigned int b_page_count; /* size of page array */ unsigned int b_offset; /* page offset in first page */ @@ -377,7 +377,8 @@ static inline void xfs_buf_relse(xfs_buf_t *bp) /* * Handling of buftargs. */ -extern xfs_buftarg_t *xfs_alloc_buftarg(struct block_device *, int, const char *); +extern xfs_buftarg_t *xfs_alloc_buftarg(struct xfs_mount *, + struct block_device *, int, const char *); extern void xfs_free_buftarg(struct xfs_mount *, struct xfs_buftarg *); extern void xfs_wait_buftarg(xfs_buftarg_t *); extern int xfs_setsize_buftarg(xfs_buftarg_t *, unsigned int, unsigned int); |