mm/mmu_notifier: convert user range->blockable to helper function

Use the mmu_notifier_range_blockable() helper function instead of directly
dereferencing the range->blockable field.  This is done to make it easier
to change the mmu_notifier range field.

This patch is the outcome of the following coccinelle patch:

%<-------------------------------------------------------------------
@@
identifier I1, FN;
@@
FN(..., struct mmu_notifier_range *I1, ...) {
<...
-I1->blockable
+mmu_notifier_range_blockable(I1)
...>
}
------------------------------------------------------------------->%

spatch --in-place --sp-file blockable.spatch --dir .

Link: http://lkml.kernel.org/r/20190326164747.24405-3-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Reviewed-by: Ralph Campbell <rcampbell@nvidia.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
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: Ross Zwisler <zwisler@kernel.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krcmar <rkrcmar@redhat.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Christian Koenig <christian.koenig@amd.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 4 insertions, 4 deletions

diff --git a/mm/hmm.c b/mm/hmm.c
index 44a238642b1d..0db8491090b8 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -205,9 +205,9 @@ static int hmm_invalidate_range_start(struct mmu_notifier *mn,
 	update.start = nrange->start;
 	update.end = nrange->end;
 	update.event = HMM_UPDATE_INVALIDATE;
-	update.blockable = nrange->blockable;
+	update.blockable = mmu_notifier_range_blockable(nrange);
 
-	if (nrange->blockable)
+	if (mmu_notifier_range_blockable(nrange))
 		mutex_lock(&hmm->lock);
 	else if (!mutex_trylock(&hmm->lock)) {
 		ret = -EAGAIN;
@@ -222,7 +222,7 @@ static int hmm_invalidate_range_start(struct mmu_notifier *mn,
 	}
 	mutex_unlock(&hmm->lock);
 
-	if (nrange->blockable)
+	if (mmu_notifier_range_blockable(nrange))
 		down_read(&hmm->mirrors_sem);
 	else if (!down_read_trylock(&hmm->mirrors_sem)) {
 		ret = -EAGAIN;
diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c
index 9c884abc7850..abd88c466eb2 100644
--- a/mm/mmu_notifier.c
+++ b/mm/mmu_notifier.c
@@ -180,7 +180,7 @@ int __mmu_notifier_invalidate_range_start(struct mmu_notifier_range *range)
 			if (_ret) {
 				pr_info("%pS callback failed with %d in %sblockable context.\n",
 					mn->ops->invalidate_range_start, _ret,
-					!range->blockable ? "non-" : "");
+					!mmu_notifier_range_blockable(range) ? "non-" : "");
 				ret = _ret;
 			}
 		}