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io_uring/kbuf: move io_ring_head_to_buf() to kbuf.h

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In preparation for using this helper in kbuf.h as well, move it there and
turn it into a macro.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2024-08-12 09:25:36 -06:00
parent ecd5c9b296
commit 2c8fa70bf3
2 changed files with 3 additions and 6 deletions
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6
io_uring/kbuf.c
View File

@ -132,12 +132,6 @@ static int io_provided_buffers_select(struct io_kiocb *req, size_t *len,
return 0;
}
static struct io_uring_buf *io_ring_head_to_buf(struct io_uring_buf_ring *br,
__u16 head, __u16 mask)
{
return &br->bufs[head & mask];
}
static void __user *io_ring_buffer_select(struct io_kiocb *req, size_t *len,
struct io_buffer_list *bl,
unsigned int issue_flags)

3
io_uring/kbuf.h
View File

@ -121,6 +121,9 @@ static inline bool io_kbuf_recycle(struct io_kiocb *req, unsigned issue_flags)
return false;
}
/* Mapped buffer ring, return io_uring_buf from head */
#define io_ring_head_to_buf(br, head, mask) &(br)->bufs[(head) & (mask)]
static inline void io_kbuf_commit(struct io_kiocb *req,
struct io_buffer_list *bl, int nr)
{