lkml.org 
[lkml]   [2020]   [Mar]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] x86/mce: Add compat_ioctl assignment to make it compatible with 32-bit system
Date
From: He Zhe <zhe.he@windriver.com>

32-bit user-space program would get errors like the following from ioctl
syscall due to missing compat_ioctl.
MCE_GET_RECORD_LEN: Inappropriate ioctl for device

compat_ptr_ioctl is provided as a generic implementation of .compat_ioctl
file operation to ioctl functions that either ignore the argument or pass
a pointer to a compatible data type.

Signed-off-by: He Zhe <zhe.he@windriver.com>
---
arch/x86/kernel/cpu/mce/dev-mcelog.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/cpu/mce/dev-mcelog.c b/arch/x86/kernel/cpu/mce/dev-mcelog.c
index 7c8958d..6c9b91b7 100644
--- a/arch/x86/kernel/cpu/mce/dev-mcelog.c
+++ b/arch/x86/kernel/cpu/mce/dev-mcelog.c
@@ -328,6 +328,7 @@ static const struct file_operations mce_chrdev_ops = {
.write = mce_chrdev_write,
.poll = mce_chrdev_poll,
.unlocked_ioctl = mce_chrdev_ioctl,
+ .compat_ioctl = compat_ptr_ioctl,
.llseek = no_llseek,
};

--
2.7.4
\
 
 \ /
  Last update: 2020-03-04 07:40    [W:0.180 / U:1.532 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site