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It's possible for a poll_table to be null. This can happen if an end-user just wants to know if a resource has events right now without registering a waiter for when events become available. Furthermore, these null pointers should be handled transparently by the API, so we should not change `from_ptr` to return an `Option`. Thus, change `PollTable` to wrap a raw pointer rather than use a reference so that you can pass null. Comments mentioning `struct poll_table` are changed to just `poll_table` since `poll_table` is a typedef. (It's a typedef because it's supposed to be opaque.) Reviewed-by: Benno Lossin <lossin@kernel.org> Signed-off-by: Alice Ryhl <aliceryhl@google.com>
10 lines
227 B
C
10 lines
227 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/export.h>
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#include <linux/poll.h>
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void rust_helper_poll_wait(struct file *filp, wait_queue_head_t *wait_address,
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poll_table *p)
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{
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poll_wait(filp, wait_address, p);
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}
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