perf/ring_buffer: Modify the parameter type of perf_mmap_free_page()

In perf_mmap_free_page(), the unsigned long type is converted to the
pointer type, but where the call is made, the pointer type is converted
to the unsigned long type. There is no need to do these operations.

Modify the parameter type of perf_mmap_free_page() to pointer type.
Signed-off-by: NYunfeng Ye <yeyunfeng@huawei.com>
Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org>
Cc: <jolsa@redhat.co>
Cc: <acme@kernel.org>
Cc: <mingo@redhat.com>
Cc: <mark.rutland@arm.com>
Cc: <namhyung@kernel.org>
Cc: <alexander.shishkin@linux.intel.com>
Link: https://lkml.kernel.org/r/e6ae3f0c-d04c-50f9-544a-aee3b30330cd@huawei.com

kernel/events/ring_buffer.c

@@ -799,9 +799,9 @@ struct ring_buffer *rb_alloc(int nr_pages, long watermark, int cpu, int flags)
 	return NULL;
 }
 
-static void perf_mmap_free_page(unsigned long addr)
+static void perf_mmap_free_page(void *addr)
 {
-	struct page *page = virt_to_page((void *)addr);
+	struct page *page = virt_to_page(addr);
 
 	page->mapping = NULL;
 	__free_page(page);
@@ -811,9 +811,9 @@ void rb_free(struct ring_buffer *rb)
 {
 	int i;
 
-	perf_mmap_free_page((unsigned long)rb->user_page);
+	perf_mmap_free_page(rb->user_page);
 	for (i = 0; i < rb->nr_pages; i++)
-		perf_mmap_free_page((unsigned long)rb->data_pages[i]);
+		perf_mmap_free_page(rb->data_pages[i]);
 	kfree(rb);
 }