From: He Zhe <[email protected]> 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. https://lore.kernel.org/lkml/[email protected]/ Signed-off-by: He Zhe <[email protected]> --- 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
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