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uml: activate_mm: remove the dead PF_BORROWED_MM check

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use_mm() was changed to use switch_mm() instead of activate_mm(), since
then nobody calls (and nobody should call) activate_mm() with
PF_BORROWED_MM bit set.

As Jeff Dike pointed out, we can also remove the "old != new" check, it is
always true.

Signed-off-by: Oleg Nesterov <[email protected]>
Cc: Jeff Dike <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Oleg Nesterov 2008-06-06 11:31:39 -07:00 • committed by Linus Torvalds
commit aab2545fdd
2 changed files with 3 additions and 13 deletions
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4
fs/aio.c
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@ -591,10 +591,6 @@ static void use_mm(struct mm_struct *mm)
atomic_inc(&mm->mm_count);
tsk->mm = mm;
tsk->active_mm = mm;
/*
* Note that on UML this *requires* PF_BORROWED_MM to be set, otherwise
* it won't work. Update it accordingly if you change it here
*/
switch_mm(active_mm, mm, tsk);
task_unlock(tsk);