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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2016-09-02 05:58:20 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-09-02 17:22:51 +0200 |
| commit | 9988ce685676cebe0b14dc128f00e1ae9cd1a4fa (patch) | |
| tree | 5f7e2212bca74c839e686068b74ca3b3dec5d739 /drivers/hv/hyperv_vmbus.h | |
| parent | 98f531b10d23e3c28e8d34c0e88822a81231b3c2 (diff) | |
| download | op-kernel-dev-9988ce685676cebe0b14dc128f00e1ae9cd1a4fa.zip op-kernel-dev-9988ce685676cebe0b14dc128f00e1ae9cd1a4fa.tar.gz | |
Drivers: hv: ring_buffer: wrap around mappings for ring buffers
Make it possible to always use a single memcpy() or to provide a direct
link to a packet on the ring buffer by creating virtual mapping for two
copies of the ring buffer with vmap(). Utilize currently empty
hv_ringbuffer_cleanup() to do the unmap.
While on it, replace sizeof(struct hv_ring_buffer) check
in hv_ringbuffer_init() with BUILD_BUG_ON() as it is a compile time check.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Tested-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv/hyperv_vmbus.h')
| -rw-r--r-- | drivers/hv/hyperv_vmbus.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h index ddcc348..a5b4442 100644 --- a/drivers/hv/hyperv_vmbus.h +++ b/drivers/hv/hyperv_vmbus.h @@ -522,8 +522,8 @@ extern unsigned int host_info_edx; /* Interface */ -int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, void *buffer, - u32 buflen); +int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, + struct page *pages, u32 pagecnt); void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info); |
