[PATCH] {get,set}affinity unification

This one gets rid of sys32_{get,set}affinity in favor of a unified
compat implementation.

1 files changed, 51 insertions, 0 deletions

diff --git a/kernel/compat.c b/kernel/compat.c
index 7b04cf90c847..13ab289c0fc5 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -226,3 +226,54 @@ asmlinkage long compat_sys_futex(u32 *uaddr, int op, int val,
 	}
 	return do_futex((unsigned long)uaddr, op, val, timeout);
 }
+
+extern asmlinkage long sys_sched_setaffinity(pid_t pid, unsigned int len,
+					    unsigned long *user_mask_ptr);
+
+asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, 
+					     unsigned int len,
+					     compat_ulong_t *user_mask_ptr)
+{
+	unsigned long kernel_mask;
+	mm_segment_t old_fs;
+	int ret;
+
+	if (get_user(kernel_mask, user_mask_ptr))
+		return -EFAULT;
+
+	old_fs = get_fs();
+	set_fs(KERNEL_DS);
+	ret = sys_sched_setaffinity(pid,
+				    sizeof(kernel_mask),
+				    &kernel_mask);
+	set_fs(old_fs);
+
+	return ret;
+}
+
+extern asmlinkage long sys_sched_getaffinity(pid_t pid, unsigned int len,
+					    unsigned long *user_mask_ptr);
+
+asmlinkage int compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len,
+					    compat_ulong_t *user_mask_ptr)
+{
+	unsigned long kernel_mask;
+	mm_segment_t old_fs;
+	int ret;
+
+	old_fs = get_fs();
+	set_fs(KERNEL_DS);
+	ret = sys_sched_getaffinity(pid,
+				    sizeof(kernel_mask),
+				    &kernel_mask);
+	set_fs(old_fs);
+
+	if (ret > 0) {
+		if (put_user(kernel_mask, user_mask_ptr))
+			ret = -EFAULT;
+		ret = sizeof(compat_ulong_t);
+	}
+
+	return ret;
+}
+