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authorJérôme Glisse <jglisse@redhat.com>2018-12-28 11:38:09 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-12-28 23:11:50 +0300
commitac46d4f3c43241ffa23d5bf36153a0830c0e02cc (patch)
tree8fb9505fd38170afe5c9ba8ff0ed54bbe6caaf4d /mm/ksm.c
parent5d6527a784f7a6d247961e046e830de8d71b47d1 (diff)
downloadlinux-ac46d4f3c43241ffa23d5bf36153a0830c0e02cc.tar.xz
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>
Diffstat (limited to 'mm/ksm.c')
-rw-r--r--mm/ksm.c21
1 files changed, 9 insertions, 12 deletions
diff --git a/mm/ksm.c b/mm/ksm.c
index 1a088306ef81..38c0360482fa 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -1042,8 +1042,7 @@ static int write_protect_page(struct vm_area_struct *vma, struct page *page,
};
int swapped;
int err = -EFAULT;
- unsigned long mmun_start; /* For mmu_notifiers */
- unsigned long mmun_end; /* For mmu_notifiers */
+ struct mmu_notifier_range range;
pvmw.address = page_address_in_vma(page, vma);
if (pvmw.address == -EFAULT)
@@ -1051,9 +1050,9 @@ static int write_protect_page(struct vm_area_struct *vma, struct page *page,
BUG_ON(PageTransCompound(page));
- mmun_start = pvmw.address;
- mmun_end = pvmw.address + PAGE_SIZE;
- mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end);
+ mmu_notifier_range_init(&range, mm, pvmw.address,
+ pvmw.address + PAGE_SIZE);
+ mmu_notifier_invalidate_range_start(&range);
if (!page_vma_mapped_walk(&pvmw))
goto out_mn;
@@ -1105,7 +1104,7 @@ static int write_protect_page(struct vm_area_struct *vma, struct page *page,
out_unlock:
page_vma_mapped_walk_done(&pvmw);
out_mn:
- mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
+ mmu_notifier_invalidate_range_end(&range);
out:
return err;
}
@@ -1129,8 +1128,7 @@ static int replace_page(struct vm_area_struct *vma, struct page *page,
spinlock_t *ptl;
unsigned long addr;
int err = -EFAULT;
- unsigned long mmun_start; /* For mmu_notifiers */
- unsigned long mmun_end; /* For mmu_notifiers */
+ struct mmu_notifier_range range;
addr = page_address_in_vma(page, vma);
if (addr == -EFAULT)
@@ -1140,9 +1138,8 @@ static int replace_page(struct vm_area_struct *vma, struct page *page,
if (!pmd)
goto out;
- mmun_start = addr;
- mmun_end = addr + PAGE_SIZE;
- mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end);
+ mmu_notifier_range_init(&range, mm, addr, addr + PAGE_SIZE);
+ mmu_notifier_invalidate_range_start(&range);
ptep = pte_offset_map_lock(mm, pmd, addr, &ptl);
if (!pte_same(*ptep, orig_pte)) {
@@ -1188,7 +1185,7 @@ static int replace_page(struct vm_area_struct *vma, struct page *page,
pte_unmap_unlock(ptep, ptl);
err = 0;
out_mn:
- mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
+ mmu_notifier_invalidate_range_end(&range);
out:
return err;
}