diff options
| author | Stephen Hemminger <stephen@networkplumber.org> | 2017-12-01 11:01:49 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-12-03 10:10:02 -0500 |
| commit | 0487426fedf7cf800115bac7ea391de1e2e0fa5f (patch) | |
| tree | f09b1169817849c0c1d2ae71524465bf5cdef428 /include/linux/hyperv.h | |
| parent | f5a2255010b0bde6df5a9060dbc826ad14ad4c44 (diff) | |
| download | linux-0487426fedf7cf800115bac7ea391de1e2e0fa5f.tar.gz | |
vmbus: make hv_get_ringbuffer_availbytes local
The last use of hv_get_ringbuffer_availbytes in drivers is now
gone. Only used by the debug info routine so make it static. Also, add
READ_ONCE() to avoid any possible issues with potentially volatile
index values.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/hyperv.h')
| -rw-r--r-- | include/linux/hyperv.h | 22 |
1 files changed, 0 insertions, 22 deletions
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index f3e97c5f94c9..5f8bd0cebddf 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -127,28 +127,6 @@ struct hv_ring_buffer_info { u32 priv_read_index; }; -/* - * - * hv_get_ringbuffer_availbytes() - * - * Get number of bytes available to read and to write to - * for the specified ring buffer - */ -static inline void -hv_get_ringbuffer_availbytes(const struct hv_ring_buffer_info *rbi, - u32 *read, u32 *write) -{ - u32 read_loc, write_loc, dsize; - - /* Capture the read/write indices before they changed */ - read_loc = rbi->ring_buffer->read_index; - write_loc = rbi->ring_buffer->write_index; - dsize = rbi->ring_datasize; - - *write = write_loc >= read_loc ? dsize - (write_loc - read_loc) : - read_loc - write_loc; - *read = dsize - *write; -} static inline u32 hv_get_bytes_to_read(const struct hv_ring_buffer_info *rbi) { |