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From cc0ebdcaaa687a1045e1171e628d5c5ad0a8c34e Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Mon, 4 Jul 2011 09:48:40 +0200
Subject: [PATCH 197/274] mm-protect-activate-switch-mm.patch
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
fs/exec.c | 2 ++
mm/mmu_context.c | 2 ++
2 files changed, 4 insertions(+)
diff --git a/fs/exec.c b/fs/exec.c
index 6c4791d..3b9a7a3 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -840,10 +840,12 @@ static int exec_mmap(struct mm_struct *mm)
}
}
task_lock(tsk);
+ local_irq_disable_rt();
active_mm = tsk->active_mm;
tsk->mm = mm;
tsk->active_mm = mm;
activate_mm(active_mm, mm);
+ local_irq_enable_rt();
task_unlock(tsk);
arch_pick_mmap_layout(mm);
if (old_mm) {
diff --git a/mm/mmu_context.c b/mm/mmu_context.c
index 3dcfaf4..8ca7e6b 100644
--- a/mm/mmu_context.c
+++ b/mm/mmu_context.c
@@ -26,6 +26,7 @@ void use_mm(struct mm_struct *mm)
struct task_struct *tsk = current;
task_lock(tsk);
+ local_irq_disable_rt();
active_mm = tsk->active_mm;
if (active_mm != mm) {
atomic_inc(&mm->mm_count);
@@ -33,6 +34,7 @@ void use_mm(struct mm_struct *mm)
}
tsk->mm = mm;
switch_mm(active_mm, mm, tsk);
+ local_irq_enable_rt();
task_unlock(tsk);
if (active_mm != mm)
--
1.7.10.4
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