Merge branch 'for-6.5/apple' into for-linus

- improved support for Keychron K8 keyboard (Lasse Brun)

1 files changed, 36 insertions, 0 deletions

diff --git a/kernel/sys.c b/kernel/sys.c
index 351de7916302..339fee3eff6a 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -15,6 +15,7 @@
 #include <linux/highuid.h>
 #include <linux/fs.h>
 #include <linux/kmod.h>
+#include <linux/ksm.h>
 #include <linux/perf_event.h>
 #include <linux/resource.h>
 #include <linux/kernel.h>
@@ -2388,6 +2389,16 @@ static inline int prctl_get_mdwe(unsigned long arg2, unsigned long arg3,
 		PR_MDWE_REFUSE_EXEC_GAIN : 0;
 }
 
+static int prctl_get_auxv(void __user *addr, unsigned long len)
+{
+	struct mm_struct *mm = current->mm;
+	unsigned long size = min_t(unsigned long, sizeof(mm->saved_auxv), len);
+
+	if (size && copy_to_user(addr, mm->saved_auxv, size))
+		return -EFAULT;
+	return sizeof(mm->saved_auxv);
+}
+
 SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
 		unsigned long, arg4, unsigned long, arg5)
 {
@@ -2518,6 +2529,11 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
 			else
 				return -EINVAL;
 			break;
+	case PR_GET_AUXV:
+		if (arg4 || arg5)
+			return -EINVAL;
+		error = prctl_get_auxv((void __user *)arg2, arg3);
+		break;
 		default:
 			return -EINVAL;
 		}
@@ -2672,6 +2688,26 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
 	case PR_SET_VMA:
 		error = prctl_set_vma(arg2, arg3, arg4, arg5);
 		break;
+#ifdef CONFIG_KSM
+	case PR_SET_MEMORY_MERGE:
+		if (arg3 || arg4 || arg5)
+			return -EINVAL;
+		if (mmap_write_lock_killable(me->mm))
+			return -EINTR;
+
+		if (arg2)
+			error = ksm_enable_merge_any(me->mm);
+		else
+			error = ksm_disable_merge_any(me->mm);
+		mmap_write_unlock(me->mm);
+		break;
+	case PR_GET_MEMORY_MERGE:
+		if (arg2 || arg3 || arg4 || arg5)
+			return -EINVAL;
+
+		error = !!test_bit(MMF_VM_MERGE_ANY, &me->mm->flags);
+		break;
+#endif
 	default:
 		error = -EINVAL;
 		break;