diff options
Diffstat (limited to 'include/linux/virtio_ring.h')
-rw-r--r-- | include/linux/virtio_ring.h | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h index c4a598fb3826..01bf3124e312 100644 --- a/include/linux/virtio_ring.h +++ b/include/linux/virtio_ring.h | |||
@@ -83,7 +83,7 @@ struct vring { | |||
83 | * __u16 avail_idx; | 83 | * __u16 avail_idx; |
84 | * __u16 available[num]; | 84 | * __u16 available[num]; |
85 | * | 85 | * |
86 | * // Padding to the next page boundary. | 86 | * // Padding to the next align boundary. |
87 | * char pad[]; | 87 | * char pad[]; |
88 | * | 88 | * |
89 | * // A ring of used descriptor heads with free-running index. | 89 | * // A ring of used descriptor heads with free-running index. |
@@ -93,19 +93,19 @@ struct vring { | |||
93 | * }; | 93 | * }; |
94 | */ | 94 | */ |
95 | static inline void vring_init(struct vring *vr, unsigned int num, void *p, | 95 | static inline void vring_init(struct vring *vr, unsigned int num, void *p, |
96 | unsigned long pagesize) | 96 | unsigned long align) |
97 | { | 97 | { |
98 | vr->num = num; | 98 | vr->num = num; |
99 | vr->desc = p; | 99 | vr->desc = p; |
100 | vr->avail = p + num*sizeof(struct vring_desc); | 100 | vr->avail = p + num*sizeof(struct vring_desc); |
101 | vr->used = (void *)(((unsigned long)&vr->avail->ring[num] + pagesize-1) | 101 | vr->used = (void *)(((unsigned long)&vr->avail->ring[num] + align-1) |
102 | & ~(pagesize - 1)); | 102 | & ~(align - 1)); |
103 | } | 103 | } |
104 | 104 | ||
105 | static inline unsigned vring_size(unsigned int num, unsigned long pagesize) | 105 | static inline unsigned vring_size(unsigned int num, unsigned long align) |
106 | { | 106 | { |
107 | return ((sizeof(struct vring_desc) * num + sizeof(__u16) * (2 + num) | 107 | return ((sizeof(struct vring_desc) * num + sizeof(__u16) * (2 + num) |
108 | + pagesize - 1) & ~(pagesize - 1)) | 108 | + align - 1) & ~(align - 1)) |
109 | + sizeof(__u16) * 2 + sizeof(struct vring_used_elem) * num; | 109 | + sizeof(__u16) * 2 + sizeof(struct vring_used_elem) * num; |
110 | } | 110 | } |
111 | 111 | ||