This is a note to let you know that I've just added the patch titled
sparc64: combine activate_mm and switch_mm
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
sparc64-combine-activate_mm-and-switch_mm.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Jun 8 08:58:54 CEST 2017
From: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
Date: Wed, 31 May 2017 11:25:21 -0400
Subject: sparc64: combine activate_mm and switch_mm
From: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
[ Upstream commit 14d0334c6748ff2aedb3f2f7fdc51ee90a9b54e7 ]
The only difference between these two functions is that in activate_mm we
unconditionally flush context. However, there is no need to keep this
difference after fixing a bug where cpumask was not reset on a wrap. So, in
this patch we combine these.
Signed-off-by: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
Reviewed-by: Bob Picco <bob.picco@xxxxxxxxxx>
Reviewed-by: Steven Sistare <steven.sistare@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/sparc/include/asm/mmu_context_64.h | 21 +--------------------
1 file changed, 1 insertion(+), 20 deletions(-)
--- a/arch/sparc/include/asm/mmu_context_64.h
+++ b/arch/sparc/include/asm/mmu_context_64.h
@@ -131,26 +131,7 @@ static inline void switch_mm(struct mm_s
}
#define deactivate_mm(tsk,mm) do { } while (0)
-
-/* Activate a new MM instance for the current task. */
-static inline void activate_mm(struct mm_struct *active_mm, struct mm_struct *mm)
-{
- unsigned long flags;
- int cpu;
-
- spin_lock_irqsave(&mm->context.lock, flags);
- if (!CTX_VALID(mm->context))
- get_new_mmu_context(mm);
- cpu = smp_processor_id();
- if (!cpumask_test_cpu(cpu, mm_cpumask(mm)))
- cpumask_set_cpu(cpu, mm_cpumask(mm));
-
- load_secondary_context(mm);
- __flush_tlb_mm(CTX_HWBITS(mm->context), SECONDARY_CONTEXT);
- tsb_context_switch(mm);
- spin_unlock_irqrestore(&mm->context.lock, flags);
-}
-
+#define activate_mm(active_mm, mm) switch_mm(active_mm, mm, NULL)
#endif /* !(__ASSEMBLY__) */
#endif /* !(__SPARC64_MMU_CONTEXT_H) */
Patches currently in stable-queue which might be from pasha.tatashin@xxxxxxxxxx are
queue-4.9/sparc64-new-context-wrap.patch
queue-4.9/sparc64-combine-activate_mm-and-switch_mm.patch
queue-4.9/sparc64-add-per-cpu-mm-of-secondary-contexts.patch
queue-4.9/sparc64-reset-mm-cpumask-after-wrap.patch
queue-4.9/sparc64-redefine-first-version.patch
queue-4.9/sparc64-delete-old-wrap-code.patch