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xfs: remove unused buffer cache APIs

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Now that the log code uses bios directly we can drop various special
cases in the buffer cache code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig
2019-06-28 19:27:27 -07:00
committed by Darrick J. Wong
parent 6e9b3dd80f
commit 0564501ff5
2 changed files with 2 additions and 108 deletions
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83
fs/xfs/xfs_buf.c
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@@ -214,7 +214,7 @@ xfs_buf_free_maps(
}
}
struct xfs_buf *
static struct xfs_buf *
_xfs_buf_alloc(
struct xfs_buftarg *target,
struct xfs_buf_map *map,
@@ -910,72 +910,6 @@ xfs_buf_read_uncached(
return 0;
}
/*
* Return a buffer allocated as an empty buffer and associated to external
* memory via xfs_buf_associate_memory() back to it's empty state.
*/
void
xfs_buf_set_empty(
struct xfs_buf *bp,
size_t numblks)
{
if (bp->b_pages)
_xfs_buf_free_pages(bp);
bp->b_pages = NULL;
bp->b_page_count = 0;
bp->b_addr = NULL;
bp->b_length = numblks;
bp->b_io_length = numblks;
ASSERT(bp->b_map_count == 1);
bp->b_bn = XFS_BUF_DADDR_NULL;
bp->b_maps[0].bm_bn = XFS_BUF_DADDR_NULL;
bp->b_maps[0].bm_len = bp->b_length;
}
int
xfs_buf_associate_memory(
xfs_buf_t *bp,
void *mem,
size_t len)
{
int rval;
int i = 0;
unsigned long pageaddr;
unsigned long offset;
size_t buflen;
int page_count;
pageaddr = (unsigned long)mem & PAGE_MASK;
offset = (unsigned long)mem - pageaddr;
buflen = PAGE_ALIGN(len + offset);
page_count = buflen >> PAGE_SHIFT;
/* Free any previous set of page pointers */
if (bp->b_pages)
_xfs_buf_free_pages(bp);
bp->b_pages = NULL;
bp->b_addr = mem;
rval = _xfs_buf_get_pages(bp, page_count);
if (rval)
return rval;
bp->b_offset = offset;
for (i = 0; i < bp->b_page_count; i++) {
bp->b_pages[i] = kmem_to_page((void *)pageaddr);
pageaddr += PAGE_SIZE;
}
bp->b_io_length = BTOBB(len);
bp->b_length = BTOBB(buflen);
return 0;
}
xfs_buf_t *
xfs_buf_get_uncached(
struct xfs_buftarg *target,
@@ -1259,7 +1193,7 @@ xfs_buf_ioend_async(
struct xfs_buf *bp)
{
INIT_WORK(&bp->b_ioend_work, xfs_buf_ioend_work);
queue_work(bp->b_ioend_wq, &bp->b_ioend_work);
queue_work(bp->b_target->bt_mount->m_buf_workqueue, &bp->b_ioend_work);
}
void
@@ -1426,21 +1360,8 @@ _xfs_buf_ioapply(
*/
bp->b_error = 0;
/*
* Initialize the I/O completion workqueue if we haven't yet or the
* submitter has not opted to specify a custom one.
*/
if (!bp->b_ioend_wq)
bp->b_ioend_wq = bp->b_target->bt_mount->m_buf_workqueue;
if (bp->b_flags & XBF_WRITE) {
op = REQ_OP_WRITE;
if (bp->b_flags & XBF_SYNCIO)
op_flags = REQ_SYNC;
if (bp->b_flags & XBF_FUA)
op_flags |= REQ_FUA;
if (bp->b_flags & XBF_FLUSH)
op_flags |= REQ_PREFLUSH;
/*
* Run the write verifier callback function if it exists. If