[PATCH 2/4] io_uring: kill hot path fixed file bitmap debug checks

[Pavel Begunkov <asml.silence@gmail.com>]

We test file_table.bitmap in io_file_get_fixed() to check invariants,
don't do it, it's expensive and was showing up in profiles.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 io_uring/filetable.h | 1 +
 io_uring/io_uring.c  | 1 -
 2 files changed, 1 insertion(+), 1 deletion(-)

diff --git a/io_uring/filetable.h b/io_uring/filetable.h
index 19d2aed66c72..351111ff8882 100644
--- a/io_uring/filetable.h
+++ b/io_uring/filetable.h
@@ -25,6 +25,7 @@ unsigned int io_file_get_flags(struct file *file);
 
 static inline void io_file_bitmap_clear(struct io_file_table *table, int bit)
 {
+	WARN_ON_ONCE(!test_bit(bit, table->bitmap));
 	__clear_bit(bit, table->bitmap);
 	table->alloc_hint = bit;
 }
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index 18aa39709fae..6e50f548de1a 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -1858,7 +1858,6 @@ inline struct file *io_file_get_fixed(struct io_kiocb *req, int fd,
 	/* mask in overlapping REQ_F and FFS bits */
 	req->flags |= (file_ptr << REQ_F_SUPPORT_NOWAIT_BIT);
 	io_req_set_rsrc_node(req, ctx, 0);
-	WARN_ON_ONCE(file && !test_bit(fd, ctx->file_table.bitmap));
 out:
 	io_ring_submit_unlock(ctx, issue_flags);
 	return file;
-- 
2.38.0