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vmbus: constify parameters where possible

Browse source 
Functions that just query state of ring buffer can have parameters
marked const.

Signed-off-by: Stephen Hemminger <[email protected]>
Signed-off-by: K. Y. Srinivasan <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Stephen Hemminger 2017-02-11 23:02:24 -07:00 • committed by Greg Kroah-Hartman
commit e4165a0fad
3 changed files with 19 additions and 21 deletions
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6
drivers/hv/hyperv_vmbus.h
View file

@ -283,14 +283,14 @@ int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info,
void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info);
int hv_ringbuffer_write(struct vmbus_channel *channel,
struct kvec *kv_list, u32 kv_count);
const struct kvec *kv_list, u32 kv_count);
int hv_ringbuffer_read(struct vmbus_channel *channel,
void *buffer, u32 buflen, u32 *buffer_actual_len,
u64 *requestid, bool raw);
void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info,
struct hv_ring_buffer_debug_info *debug_info);
void hv_ringbuffer_get_debuginfo(const struct hv_ring_buffer_info *ring_info,
struct hv_ring_buffer_debug_info *debug_info);
/*
* Maximum channels is determined by the size of the interrupt page

22
drivers/hv/ring_buffer.c
View file

@ -96,11 +96,9 @@ hv_set_next_write_location(struct hv_ring_buffer_info *ring_info,
/* Get the next read location for the specified ring buffer. */
static inline u32
hv_get_next_read_location(struct hv_ring_buffer_info *ring_info)
hv_get_next_read_location(const struct hv_ring_buffer_info *ring_info)
{
u32 next = ring_info->ring_buffer->read_index;
return next;
return ring_info->ring_buffer->read_index;
}
/*
@ -108,8 +106,8 @@ hv_get_next_read_location(struct hv_ring_buffer_info *ring_info)
* This allows the caller to skip.
*/
static inline u32
hv_get_next_readlocation_withoffset(struct hv_ring_buffer_info *ring_info,
u32 offset)
hv_get_next_readlocation_withoffset(const struct hv_ring_buffer_info *ring_info,
u32 offset)
{
u32 next = ring_info->ring_buffer->read_index;
@ -130,7 +128,7 @@ hv_set_next_read_location(struct hv_ring_buffer_info *ring_info,
/* Get the size of the ring buffer. */
static inline u32
hv_get_ring_buffersize(struct hv_ring_buffer_info *ring_info)
hv_get_ring_buffersize(const struct hv_ring_buffer_info *ring_info)
{
return ring_info->ring_datasize;
}
@ -147,7 +145,7 @@ hv_get_ring_bufferindices(struct hv_ring_buffer_info *ring_info)
* Assume there is enough room. Handles wrap-around in src case only!!
*/
static u32 hv_copyfrom_ringbuffer(
struct hv_ring_buffer_info *ring_info,
const struct hv_ring_buffer_info *ring_info,
void *dest,
u32 destlen,
u32 start_read_offset)
@ -171,7 +169,7 @@ static u32 hv_copyfrom_ringbuffer(
static u32 hv_copyto_ringbuffer(
struct hv_ring_buffer_info *ring_info,
u32 start_write_offset,
void *src,
const void *src,
u32 srclen)
{
void *ring_buffer = hv_get_ring_buffer(ring_info);
@ -186,8 +184,8 @@ static u32 hv_copyto_ringbuffer(
}
/* Get various debug metrics for the specified ring buffer. */
void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info,
struct hv_ring_buffer_debug_info *debug_info)
void hv_ringbuffer_get_debuginfo(const struct hv_ring_buffer_info *ring_info,
struct hv_ring_buffer_debug_info *debug_info)
{
u32 bytes_avail_towrite;
u32 bytes_avail_toread;
@ -264,7 +262,7 @@ void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info)
/* Write to the ring buffer. */
int hv_ringbuffer_write(struct vmbus_channel *channel,
struct kvec *kv_list, u32 kv_count)
const struct kvec *kv_list, u32 kv_count)
{
int i = 0;
u32 bytes_avail_towrite;