# \[PATCH RFC 04/22\] m68k/bootinfo: let procfs copy out reads of /proc/bootinfo

- From: Christian Brauner \<brauner@kernel.org\>
- Date: 2026-11-02 15:02:59 
- List: linux-modules
- Page: https://ratatoskr.run/linux-modules/2026/11/17845347
- Thread: https://ratatoskr.run/linux-fsdevel/2026/11/17844895/t.md

```text
Implement ->proc_read_buf() so procfs copies what is read to userspace
after it unpinned the entry.

Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
---
 arch/m68k/kernel/bootinfo_proc.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/m68k/kernel/bootinfo_proc.c b/arch/m68k/kernel/bootinfo_proc.c
index 857fa2aaa748..4936cf44e86a 100644
--- a/arch/m68k/kernel/bootinfo_proc.c
+++ b/arch/m68k/kernel/bootinfo_proc.c
@@ -19,15 +19,15 @@ static char bootinfo_tmp[1536] __initdata;
 static void *bootinfo_copy;
 static size_t bootinfo_size;
 
-static ssize_t bootinfo_read(struct file *file, char __user *buf,
+static ssize_t bootinfo_read(struct file *file, char *buf,
 			  size_t count, loff_t *ppos)
 {
-	return simple_read_from_buffer(buf, count, ppos, bootinfo_copy,
+	return memory_read_from_buffer(buf, count, ppos, bootinfo_copy,
 				       bootinfo_size);
 }
 
 static const struct proc_ops bootinfo_proc_ops = {
-	.proc_read	= bootinfo_read,
+	.proc_read_buf	= bootinfo_read,
 	.proc_lseek	= default_llseek,
 };
 

-- 
2.53.0

```