* [PATCH v6 1/8] mm/mmu_notifier: helper to test if a range invalidation is blockable
[not found] <20190326164747.24405-1-jglisse@redhat.com>
@ 2019-03-26 16:47 ` jglisse
0 siblings, 0 replies; only message in thread
From: jglisse @ 2019-03-26 16:47 UTC (permalink / raw)
To: linux-kernel
Cc: Jérôme Glisse, Andrew Morton, linux-mm,
Christian König, Joonas Lahtinen, Jani Nikula, Rodrigo Vivi,
Jan Kara, Andrea Arcangeli, Peter Xu, Felix Kuehling,
Jason Gunthorpe, Ross Zwisler, Dan Williams, Paolo Bonzini,
Radim Krčmář, Michal Hocko, Ralph Campbell,
John Hubbard, kvm, dri-devel, linux-rdma, linux-fsdevel,
Arnd Bergmann
From: Jérôme Glisse <jglisse@redhat.com>
Simple helpers to test if range invalidation is blockable. Latter
patches use cocinnelle to convert all direct dereference of range->
blockable to use this function instead so that we can convert the
blockable field to an unsigned for more flags.
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org
Cc: Christian König <christian.koenig@amd.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Felix Kuehling <Felix.Kuehling@amd.com>
Cc: Jason Gunthorpe <jgg@mellanox.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Ross Zwisler <zwisler@kernel.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Christian Koenig <christian.koenig@amd.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: kvm@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: linux-rdma@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org
Cc: Arnd Bergmann <arnd@arndb.de>
---
include/linux/mmu_notifier.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h
index 4050ec1c3b45..e630def131ce 100644
--- a/include/linux/mmu_notifier.h
+++ b/include/linux/mmu_notifier.h
@@ -226,6 +226,12 @@ extern void __mmu_notifier_invalidate_range_end(struct mmu_notifier_range *r,
extern void __mmu_notifier_invalidate_range(struct mm_struct *mm,
unsigned long start, unsigned long end);
+static inline bool
+mmu_notifier_range_blockable(const struct mmu_notifier_range *range)
+{
+ return range->blockable;
+}
+
static inline void mmu_notifier_release(struct mm_struct *mm)
{
if (mm_has_notifiers(mm))
@@ -455,6 +461,11 @@ static inline void _mmu_notifier_range_init(struct mmu_notifier_range *range,
#define mmu_notifier_range_init(range, mm, start, end) \
_mmu_notifier_range_init(range, start, end)
+static inline bool
+mmu_notifier_range_blockable(const struct mmu_notifier_range *range)
+{
+ return true;
+}
static inline int mm_has_notifiers(struct mm_struct *mm)
{
--
2.20.1
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