X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fmm_types.h;h=02a27ae78539cfe536106f46a8f89b50ea63985e;hb=13c48c490208d9e70d8d66d56f96c5054db69af7;hp=eb7c16cc95596fae106848e0a66b3b04f6f6b68a;hpb=1f43c5393033de90bac4410352b1d2a69dcbe7ef;p=linux-2.6

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index eb7c16cc95..02a27ae785 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -226,8 +226,17 @@ struct mm_struct {
 	rwlock_t		ioctx_list_lock;	/* aio lock */
 	struct kioctx		*ioctx_list;
 #ifdef CONFIG_MM_OWNER
-	struct task_struct *owner;	/* The thread group leader that */
-					/* owns the mm_struct.		*/
+	/*
+	 * "owner" points to a task that is regarded as the canonical
+	 * user/owner of this mm. All of the following must be true in
+	 * order for it to be changed:
+	 *
+	 * current == mm->owner
+	 * current->mm != mm
+	 * new_owner->mm == mm
+	 * new_owner->alloc_lock is held
+	 */
+	struct task_struct *owner;
 #endif
 
 #ifdef CONFIG_PROC_FS