mm/mmu_notifier: use structure for invalidate_range_start/end calls v2

To avoid having to change many call sites everytime we want to add a
parameter use a structure to group all parameters for the mmu_notifier
invalidate_range_start/end cakks.  No functional changes with this patch.

[akpm@linux-foundation.org: coding style fixes]
Link: http://lkml.kernel.org/r/20181205053628.3210-3-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Jan Kara <jack@suse.cz>
Cc: Matthew Wilcox <mawilcox@microsoft.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: Felix Kuehling <felix.kuehling@amd.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
From: Jérôme Glisse <jglisse@redhat.com>
Subject: mm/mmu_notifier: use structure for invalidate_range_start/end calls v3

fix build warning in migrate.c when CONFIG_MMU_NOTIFIER=n

Link: http://lkml.kernel.org/r/20181213171330.8489-3-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 9 insertions, 8 deletions

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 5442cb12e4ed..f0e8cd9edb1a 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -528,19 +528,20 @@ bool __oom_reap_task_mm(struct mm_struct *mm)
 		 * count elevated without a good reason.
 		 */
 		if (vma_is_anonymous(vma) || !(vma->vm_flags & VM_SHARED)) {
-			const unsigned long start = vma->vm_start;
-			const unsigned long end = vma->vm_end;
+			struct mmu_notifier_range range;
 			struct mmu_gather tlb;
 
-			tlb_gather_mmu(&tlb, mm, start, end);
-			if (mmu_notifier_invalidate_range_start_nonblock(mm, start, end)) {
-				tlb_finish_mmu(&tlb, start, end);
+			mmu_notifier_range_init(&range, mm, vma->vm_start,
+						vma->vm_end);
+			tlb_gather_mmu(&tlb, mm, range.start, range.end);
+			if (mmu_notifier_invalidate_range_start_nonblock(&range)) {
+				tlb_finish_mmu(&tlb, range.start, range.end);
 				ret = false;
 				continue;
 			}
-			unmap_page_range(&tlb, vma, start, end, NULL);
-			mmu_notifier_invalidate_range_end(mm, start, end);
-			tlb_finish_mmu(&tlb, start, end);
+			unmap_page_range(&tlb, vma, range.start, range.end, NULL);
+			mmu_notifier_invalidate_range_end(&range);
+			tlb_finish_mmu(&tlb, range.start, range.end);
 		}
 	}