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authorJens Axboe <axboe@kernel.dk>2024-03-13 14:58:14 -0600
committerJens Axboe <axboe@kernel.dk>2024-04-15 08:10:26 -0600
commit1943f96b3816e0f0d3d6686374d6e1d617c8b42c (patch)
treed3a5fdc9ea0f1b535f459e65b866ea981ebf5db8 /io_uring/rsrc.c
parent09fc75e0c035a2cabb8caa15cec6e85159dd94f0 (diff)
io_uring: unify io_pin_pages()
Move it into io_uring.c where it belongs, and use it in there as well rather than have two implementations of this. Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/rsrc.c')
-rw-r--r--io_uring/rsrc.c36
1 files changed, 0 insertions, 36 deletions
diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c
index 7b8a056f98ed..8a34181c97ab 100644
--- a/io_uring/rsrc.c
+++ b/io_uring/rsrc.c
@@ -870,42 +870,6 @@ static int io_buffer_account_pin(struct io_ring_ctx *ctx, struct page **pages,
return ret;
}
-struct page **io_pin_pages(unsigned long ubuf, unsigned long len, int *npages)
-{
- unsigned long start, end, nr_pages;
- struct page **pages = NULL;
- int ret;
-
- end = (ubuf + len + PAGE_SIZE - 1) >> PAGE_SHIFT;
- start = ubuf >> PAGE_SHIFT;
- nr_pages = end - start;
- WARN_ON(!nr_pages);
-
- pages = kvmalloc_array(nr_pages, sizeof(struct page *), GFP_KERNEL);
- if (!pages)
- return ERR_PTR(-ENOMEM);
-
- mmap_read_lock(current->mm);
- ret = pin_user_pages(ubuf, nr_pages, FOLL_WRITE | FOLL_LONGTERM, pages);
- mmap_read_unlock(current->mm);
-
- /* success, mapped all pages */
- if (ret == nr_pages) {
- *npages = nr_pages;
- return pages;
- }
-
- /* partial map, or didn't map anything */
- if (ret >= 0) {
- /* if we did partial map, release any pages we did get */
- if (ret)
- unpin_user_pages(pages, ret);
- ret = -EFAULT;
- }
- kvfree(pages);
- return ERR_PTR(ret);
-}
-
static int io_sqe_buffer_register(struct io_ring_ctx *ctx, struct iovec *iov,
struct io_mapped_ubuf **pimu,
struct page **last_hpage)