[PATCH 04/36] mmu_notifier: allow range invalidation to exclude a specific mmu_notifier

2015-05-21 Thread j . glisse 
From: Jérôme Glisse 

This patch allow to invalidate a range while excluding call to a specific
mmu_notifier which allow for a subsystem to invalidate a range for everyone
but itself.

Signed-off-by: Jérôme Glisse 
---
 include/linux/mmu_notifier.h | 60 +++-
 mm/mmu_notifier.c| 16 +---
 2 files changed, 67 insertions(+), 9 deletions(-)

diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h
index 283ad26..867ca06 100644
--- a/include/linux/mmu_notifier.h
+++ b/include/linux/mmu_notifier.h
@@ -294,11 +294,15 @@ extern void __mmu_notifier_invalidate_page(struct 
mm_struct *mm,
  struct page *page,
  enum mmu_event event);
 extern void __mmu_notifier_invalidate_range_start(struct mm_struct *mm,
- struct mmu_notifier_range 
*range);
+ struct mmu_notifier_range 
*range,
+ const struct mmu_notifier 
*exclude);
 extern void __mmu_notifier_invalidate_range_end(struct mm_struct *mm,
-   struct mmu_notifier_range 
*range);
+   struct mmu_notifier_range 
*range,
+   const struct mmu_notifier 
*exclude);
 extern void __mmu_notifier_invalidate_range(struct mm_struct *mm,
- unsigned long start, unsigned long end);
+   unsigned long start,
+   unsigned long end,
+   const struct mmu_notifier *exclude);
 extern bool mmu_notifier_range_is_valid(struct mm_struct *mm,
unsigned long start,
unsigned long end);
@@ -351,21 +355,46 @@ static inline void 
mmu_notifier_invalidate_range_start(struct mm_struct *mm,
   struct 
mmu_notifier_range *range)
 {
if (mm_has_notifiers(mm))
-   __mmu_notifier_invalidate_range_start(mm, range);
+   __mmu_notifier_invalidate_range_start(mm, range, NULL);
 }
 
 static inline void mmu_notifier_invalidate_range_end(struct mm_struct *mm,
 struct mmu_notifier_range 
*range)
 {
if (mm_has_notifiers(mm))
-   __mmu_notifier_invalidate_range_end(mm, range);
+   __mmu_notifier_invalidate_range_end(mm, range, NULL);
 }
 
 static inline void mmu_notifier_invalidate_range(struct mm_struct *mm,
  unsigned long start, unsigned long end)
 {
if (mm_has_notifiers(mm))
-   __mmu_notifier_invalidate_range(mm, start, end);
+   __mmu_notifier_invalidate_range(mm, start, end, NULL);
+}
+
+static inline void mmu_notifier_invalidate_range_start_excluding(struct 
mm_struct *mm,
+   struct mmu_notifier_range 
*range,
+   const struct mmu_notifier 
*exclude)
+{
+   if (mm_has_notifiers(mm))
+   __mmu_notifier_invalidate_range_start(mm, range, exclude);
+}
+
+static inline void mmu_notifier_invalidate_range_end_excluding(struct 
mm_struct *mm,
+   struct 
mmu_notifier_range *range,
+   const struct 
mmu_notifier *exclude)
+{
+   if (mm_has_notifiers(mm))
+   __mmu_notifier_invalidate_range_end(mm, range, exclude);
+}
+
+static inline void mmu_notifier_invalidate_range_excluding(struct mm_struct 
*mm,
+   unsigned long start,
+   unsigned long end,
+   const struct mmu_notifier 
*exclude)
+{
+   if (mm_has_notifiers(mm))
+   __mmu_notifier_invalidate_range(mm, start, end, exclude);
 }
 
 static inline void mmu_notifier_mm_init(struct mm_struct *mm)
@@ -515,6 +544,25 @@ static inline void mmu_notifier_invalidate_range(struct 
mm_struct *mm,
 {
 }
 
+static inline void mmu_notifier_invalidate_range_start_excluding(struct 
mm_struct *mm,
+   struct mmu_notifier_range 
*range,
+   const struct mmu_notifier 
*exclude)
+{
+}
+
+static inline void mmu_notifier_invalidate_range_end_excluding(struct 
mm_struct *mm,
+   struct 
mmu_notifier_range *range,
+   const struct 
mmu_notifier *exclude)
+{
+}
+
+static inline void mmu_notifier_invalidate_range_excluding(struct mm_struct 
*mm,
+

[PATCH 04/36] mmu_notifier: allow range invalidation to exclude a specific mmu_notifier

2015-05-21 Thread j . glisse 
From: Jérôme Glisse jgli...@redhat.com

This patch allow to invalidate a range while excluding call to a specific
mmu_notifier which allow for a subsystem to invalidate a range for everyone
but itself.

Signed-off-by: Jérôme Glisse jgli...@redhat.com
---
 include/linux/mmu_notifier.h | 60 +++-
 mm/mmu_notifier.c| 16 +---
 2 files changed, 67 insertions(+), 9 deletions(-)

diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h
index 283ad26..867ca06 100644
--- a/include/linux/mmu_notifier.h
+++ b/include/linux/mmu_notifier.h
@@ -294,11 +294,15 @@ extern void __mmu_notifier_invalidate_page(struct 
mm_struct *mm,
  struct page *page,
  enum mmu_event event);
 extern void __mmu_notifier_invalidate_range_start(struct mm_struct *mm,
- struct mmu_notifier_range 
*range);
+ struct mmu_notifier_range 
*range,
+ const struct mmu_notifier 
*exclude);
 extern void __mmu_notifier_invalidate_range_end(struct mm_struct *mm,
-   struct mmu_notifier_range 
*range);
+   struct mmu_notifier_range 
*range,
+   const struct mmu_notifier 
*exclude);
 extern void __mmu_notifier_invalidate_range(struct mm_struct *mm,
- unsigned long start, unsigned long end);
+   unsigned long start,
+   unsigned long end,
+   const struct mmu_notifier *exclude);
 extern bool mmu_notifier_range_is_valid(struct mm_struct *mm,
unsigned long start,
unsigned long end);
@@ -351,21 +355,46 @@ static inline void 
mmu_notifier_invalidate_range_start(struct mm_struct *mm,
   struct 
mmu_notifier_range *range)
 {
if (mm_has_notifiers(mm))
-   __mmu_notifier_invalidate_range_start(mm, range);
+   __mmu_notifier_invalidate_range_start(mm, range, NULL);
 }
 
 static inline void mmu_notifier_invalidate_range_end(struct mm_struct *mm,
 struct mmu_notifier_range 
*range)
 {
if (mm_has_notifiers(mm))
-   __mmu_notifier_invalidate_range_end(mm, range);
+   __mmu_notifier_invalidate_range_end(mm, range, NULL);
 }
 
 static inline void mmu_notifier_invalidate_range(struct mm_struct *mm,
  unsigned long start, unsigned long end)
 {
if (mm_has_notifiers(mm))
-   __mmu_notifier_invalidate_range(mm, start, end);
+   __mmu_notifier_invalidate_range(mm, start, end, NULL);
+}
+
+static inline void mmu_notifier_invalidate_range_start_excluding(struct 
mm_struct *mm,
+   struct mmu_notifier_range 
*range,
+   const struct mmu_notifier 
*exclude)
+{
+   if (mm_has_notifiers(mm))
+   __mmu_notifier_invalidate_range_start(mm, range, exclude);
+}
+
+static inline void mmu_notifier_invalidate_range_end_excluding(struct 
mm_struct *mm,
+   struct 
mmu_notifier_range *range,
+   const struct 
mmu_notifier *exclude)
+{
+   if (mm_has_notifiers(mm))
+   __mmu_notifier_invalidate_range_end(mm, range, exclude);
+}
+
+static inline void mmu_notifier_invalidate_range_excluding(struct mm_struct 
*mm,
+   unsigned long start,
+   unsigned long end,
+   const struct mmu_notifier 
*exclude)
+{
+   if (mm_has_notifiers(mm))
+   __mmu_notifier_invalidate_range(mm, start, end, exclude);
 }
 
 static inline void mmu_notifier_mm_init(struct mm_struct *mm)
@@ -515,6 +544,25 @@ static inline void mmu_notifier_invalidate_range(struct 
mm_struct *mm,
 {
 }
 
+static inline void mmu_notifier_invalidate_range_start_excluding(struct 
mm_struct *mm,
+   struct mmu_notifier_range 
*range,
+   const struct mmu_notifier 
*exclude)
+{
+}
+
+static inline void mmu_notifier_invalidate_range_end_excluding(struct 
mm_struct *mm,
+   struct 
mmu_notifier_range *range,
+   const struct 
mmu_notifier *exclude)
+{
+}
+
+static inline void