On Thu, Jul 19, 2007 at 05:42:38PM -0700, Andrew Morton wrote:
> On Sun, 8 Jul 2007 22:55:08 -0300
> Diego Woitasen <[email protected]> wrote:
>
> > Signed-off-by: Diego Woitasen <[email protected]>
> > ---
> > arch/i386/kernel/ldt.c | 2 +-
> > arch/x86_64/kernel/ldt.c | 2 +-
> > 2 files changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/arch/i386/kernel/ldt.c b/arch/i386/kernel/ldt.c
> > index e0b2d17..c2eb4fb 100644
> > --- a/arch/i386/kernel/ldt.c
> > +++ b/arch/i386/kernel/ldt.c
> > @@ -96,7 +96,7 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
> >
> > init_MUTEX(&mm->context.sem);
> > mm->context.size = 0;
> > - old_mm = current->mm;
> > + old_mm = tsk->mm;
> > if (old_mm && old_mm->context.size > 0) {
> > down(&old_mm->context.sem);
> > retval = copy_ldt(&mm->context, &old_mm->context);
> > diff --git a/arch/x86_64/kernel/ldt.c b/arch/x86_64/kernel/ldt.c
> > index bc9ffd5..99a92ed 100644
> > --- a/arch/x86_64/kernel/ldt.c
> > +++ b/arch/x86_64/kernel/ldt.c
> > @@ -100,7 +100,7 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
> >
> > init_MUTEX(&mm->context.sem);
> > mm->context.size = 0;
> > - old_mm = current->mm;
> > + old_mm = tsk->mm;
> > if (old_mm && old_mm->context.size > 0) {
> > down(&old_mm->context.sem);
> > retval = copy_ldt(&mm->context, &old_mm->context);
>
>
> When called from dup_mm(), `tsk' refers to the new task and `current'
> refers to the old one. I'd have expected this to crash during your testing?
> -
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Yes, sorry... that patch is bad. Now my question is, why all
architectures have the task argument and neither use it? I undertand now
that init_new_context() work with current but what about the *tsk arg.
--
--------------
Diego Woitasen
-
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