Fix exec_mmap() to release the MM while we still have it active,

to properly de-activate it and make the child_tid logic work
correctly.

Clear %fs/%gs in deactivate_mm() on x86, since our LDT will no
longer be valid after this.

Update mm_release() to deactivate MM state before releasing,
and avoid the expensive child_tid FUTEX if we're the last user
of the MM.

1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 9545a1957089..9916d377a74b 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -566,7 +566,7 @@ static inline void mmdrop(struct mm_struct * mm)
 /* mmput gets rid of the mappings and all user-space */
 extern void mmput(struct mm_struct *);
 /* Remove the current tasks stale references to the old mm_struct */
-extern void mm_release(void);
+extern void mm_release(struct task_struct *, struct mm_struct *);
 
 extern int  copy_thread(int, unsigned long, unsigned long, unsigned long, struct task_struct *, struct pt_regs *);
 extern void flush_thread(void);