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mm: use new helper functions around the i_mmap_mutex 

Convert all open coded mutex_lock/unlock calls to the
i_mmap_[lock/unlock]_write() helpers.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: "Kirill A. Shutemov" <kirill@shutemov.name>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Davidlohr Bueso 2014-12-12 16:54:21 -08:00 committed by Linus Torvalds
parent 8b28f621be
commit 83cde9e8ba
12 changed files with 40 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
fs/hugetlbfs/inode.c
View File

@ -412,10 +412,10 @@ static int hugetlb_vmtruncate(struct inode *inode, loff_t offset)
pgoff = offset >> PAGE_SHIFT;
i_size_write(inode, offset);
mutex_lock(&mapping->i_mmap_mutex);
i_mmap_lock_write(mapping);
if (!RB_EMPTY_ROOT(&mapping->i_mmap))
hugetlb_vmtruncate_list(&mapping->i_mmap, pgoff);
mutex_unlock(&mapping->i_mmap_mutex);
i_mmap_unlock_write(mapping);
truncate_hugepages(inode, offset);
return 0;
}

4
kernel/events/uprobes.c
View File

@ -724,7 +724,7 @@ build_map_info(struct address_space *mapping, loff_t offset, bool is_register)
int more = 0;
again:
mutex_lock(&mapping->i_mmap_mutex);
i_mmap_lock_write(mapping);
vma_interval_tree_foreach(vma, &mapping->i_mmap, pgoff, pgoff) {
if (!valid_vma(vma, is_register))
continue;
@ -755,7 +755,7 @@ build_map_info(struct address_space *mapping, loff_t offset, bool is_register)
info->mm = vma->vm_mm;
info->vaddr = offset_to_vaddr(vma, offset);
}
mutex_unlock(&mapping->i_mmap_mutex);
i_mmap_unlock_write(mapping);
if (!more)
goto out;

4
kernel/fork.c
View File

@ -433,7 +433,7 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
get_file(file);
if (tmp->vm_flags & VM_DENYWRITE)
atomic_dec(&inode->i_writecount);
mutex_lock(&mapping->i_mmap_mutex);
i_mmap_lock_write(mapping);
if (tmp->vm_flags & VM_SHARED)
atomic_inc(&mapping->i_mmap_writable);
flush_dcache_mmap_lock(mapping);
@ -445,7 +445,7 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
vma_interval_tree_insert_after(tmp, mpnt,
&mapping->i_mmap);
flush_dcache_mmap_unlock(mapping);
mutex_unlock(&mapping->i_mmap_mutex);
i_mmap_unlock_write(mapping);
}
/*

4
mm/filemap_xip.c
View File

@ -182,7 +182,7 @@ __xip_unmap (struct address_space * mapping,
return;
retry:
mutex_lock(&mapping->i_mmap_mutex);
i_mmap_lock_write(mapping);
vma_interval_tree_foreach(vma, &mapping->i_mmap, pgoff, pgoff) {
mm = vma->vm_mm;
address = vma->vm_start +
@ -202,7 +202,7 @@ __xip_unmap (struct address_space * mapping,
page_cache_release(page);
}
}
mutex_unlock(&mapping->i_mmap_mutex);
i_mmap_unlock_write(mapping);
if (locked) {
mutex_unlock(&xip_sparse_mutex);

4
mm/fremap.c
View File

@ -238,13 +238,13 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
}
goto out_freed;
}
mutex_lock(&mapping->i_mmap_mutex);
i_mmap_lock_write(mapping);
flush_dcache_mmap_lock(mapping);
vma->vm_flags |= VM_NONLINEAR;
vma_interval_tree_remove(vma, &mapping->i_mmap);
vma_nonlinear_insert(vma, &mapping->i_mmap_nonlinear);
flush_dcache_mmap_unlock(mapping);
mutex_unlock(&mapping->i_mmap_mutex);
i_mmap_unlock_write(mapping);
}
if (vma->vm_flags & VM_LOCKED) {

12
mm/hugetlb.c
View File

@ -2774,7 +2774,7 @@ static void unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma,
* this mapping should be shared between all the VMAs,
* __unmap_hugepage_range() is called as the lock is already held
*/
mutex_lock(&mapping->i_mmap_mutex);
i_mmap_lock_write(mapping);
vma_interval_tree_foreach(iter_vma, &mapping->i_mmap, pgoff, pgoff) {
/* Do not unmap the current VMA */
if (iter_vma == vma)
@ -2791,7 +2791,7 @@ static void unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma,
unmap_hugepage_range(iter_vma, address,
address + huge_page_size(h), page);
}
mutex_unlock(&mapping->i_mmap_mutex);
i_mmap_unlock_write(mapping);
}
/*
@ -3348,7 +3348,7 @@ unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
flush_cache_range(vma, address, end);
mmu_notifier_invalidate_range_start(mm, start, end);
mutex_lock(&vma->vm_file->f_mapping->i_mmap_mutex);
i_mmap_lock_write(vma->vm_file->f_mapping);
for (; address < end; address += huge_page_size(h)) {
spinlock_t *ptl;
ptep = huge_pte_offset(mm, address);
@ -3376,7 +3376,7 @@ unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
* and that page table be reused and filled with junk.
*/
flush_tlb_range(vma, start, end);
mutex_unlock(&vma->vm_file->f_mapping->i_mmap_mutex);
i_mmap_unlock_write(vma->vm_file->f_mapping);
mmu_notifier_invalidate_range_end(mm, start, end);
return pages << h->order;
@ -3544,7 +3544,7 @@ pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud)
if (!vma_shareable(vma, addr))
return (pte_t *)pmd_alloc(mm, pud, addr);
mutex_lock(&mapping->i_mmap_mutex);
i_mmap_lock_write(mapping);
vma_interval_tree_foreach(svma, &mapping->i_mmap, idx, idx) {
if (svma == vma)
continue;
@ -3572,7 +3572,7 @@ pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud)
spin_unlock(ptl);
out:
pte = (pte_t *)pmd_alloc(mm, pud, addr);
mutex_unlock(&mapping->i_mmap_mutex);
i_mmap_unlock_write(mapping);
return pte;
}

4
mm/memory-failure.c
View File

@ -466,7 +466,7 @@ static void collect_procs_file(struct page *page, struct list_head *to_kill,
struct task_struct *tsk;
struct address_space *mapping = page->mapping;
mutex_lock(&mapping->i_mmap_mutex);
i_mmap_lock_write(mapping);
read_lock(&tasklist_lock);
for_each_process(tsk) {
pgoff_t pgoff = page_to_pgoff(page);
@ -488,7 +488,7 @@ static void collect_procs_file(struct page *page, struct list_head *to_kill,
}
}
read_unlock(&tasklist_lock);
mutex_unlock(&mapping->i_mmap_mutex);
i_mmap_unlock_write(mapping);
}
/*

8
mm/memory.c
View File

@ -1326,9 +1326,9 @@ static void unmap_single_vma(struct mmu_gather *tlb,
* safe to do nothing in this case.
*/
if (vma->vm_file) {
mutex_lock(&vma->vm_file->f_mapping->i_mmap_mutex);
i_mmap_lock_write(vma->vm_file->f_mapping);
__unmap_hugepage_range_final(tlb, vma, start, end, NULL);
mutex_unlock(&vma->vm_file->f_mapping->i_mmap_mutex);
i_mmap_unlock_write(vma->vm_file->f_mapping);
}
} else
unmap_page_range(tlb, vma, start, end, details);
@ -2377,12 +2377,12 @@ void unmap_mapping_range(struct address_space *mapping,
details.last_index = ULONG_MAX;
mutex_lock(&mapping->i_mmap_mutex);
i_mmap_lock_write(mapping);
if (unlikely(!RB_EMPTY_ROOT(&mapping->i_mmap)))
unmap_mapping_range_tree(&mapping->i_mmap, &details);
if (unlikely(!list_empty(&mapping->i_mmap_nonlinear)))
unmap_mapping_range_list(&mapping->i_mmap_nonlinear, &details);
mutex_unlock(&mapping->i_mmap_mutex);
i_mmap_unlock_write(mapping);
}
EXPORT_SYMBOL(unmap_mapping_range);

14
mm/mmap.c
View File

@ -260,9 +260,9 @@ void unlink_file_vma(struct vm_area_struct *vma)
if (file) {
struct address_space *mapping = file->f_mapping;
mutex_lock(&mapping->i_mmap_mutex);
i_mmap_lock_write(mapping);
__remove_shared_vm_struct(vma, file, mapping);
mutex_unlock(&mapping->i_mmap_mutex);
i_mmap_unlock_write(mapping);
}
}
@ -674,14 +674,14 @@ static void vma_link(struct mm_struct *mm, struct vm_area_struct *vma,
if (vma->vm_file) {
mapping = vma->vm_file->f_mapping;
mutex_lock(&mapping->i_mmap_mutex);
i_mmap_lock_write(mapping);
}
__vma_link(mm, vma, prev, rb_link, rb_parent);
__vma_link_file(vma);
if (mapping)
mutex_unlock(&mapping->i_mmap_mutex);
i_mmap_unlock_write(mapping);
mm->map_count++;
validate_mm(mm);
@ -796,7 +796,7 @@ again: remove_next = 1 + (end > next->vm_end);
next->vm_end);
}
mutex_lock(&mapping->i_mmap_mutex);
i_mmap_lock_write(mapping);
if (insert) {
/*
* Put into interval tree now, so instantiated pages
@ -883,7 +883,7 @@ again: remove_next = 1 + (end > next->vm_end);
anon_vma_unlock_write(anon_vma);
}
if (mapping)
mutex_unlock(&mapping->i_mmap_mutex);
i_mmap_unlock_write(mapping);
if (root) {
uprobe_mmap(vma);
@ -3182,7 +3182,7 @@ static void vm_unlock_mapping(struct address_space *mapping)
* AS_MM_ALL_LOCKS can't change to 0 from under us
* because we hold the mm_all_locks_mutex.
*/
mutex_unlock(&mapping->i_mmap_mutex);
i_mmap_unlock_write(mapping);
if (!test_and_clear_bit(AS_MM_ALL_LOCKS,
&mapping->flags))
BUG();

4
mm/mremap.c
View File

@ -119,7 +119,7 @@ static void move_ptes(struct vm_area_struct *vma, pmd_t *old_pmd,
if (need_rmap_locks) {
if (vma->vm_file) {
mapping = vma->vm_file->f_mapping;
mutex_lock(&mapping->i_mmap_mutex);
i_mmap_lock_write(mapping);
}
if (vma->anon_vma) {
anon_vma = vma->anon_vma;
@ -156,7 +156,7 @@ static void move_ptes(struct vm_area_struct *vma, pmd_t *old_pmd,
if (anon_vma)
anon_vma_unlock_write(anon_vma);
if (mapping)
mutex_unlock(&mapping->i_mmap_mutex);
i_mmap_unlock_write(mapping);
}
#define LATENCY_LIMIT (64 * PAGE_SIZE)

14
mm/nommu.c
View File

@ -722,11 +722,11 @@ static void add_vma_to_mm(struct mm_struct *mm, struct vm_area_struct *vma)
if (vma->vm_file) {
mapping = vma->vm_file->f_mapping;
mutex_lock(&mapping->i_mmap_mutex);
i_mmap_lock_write(mapping);
flush_dcache_mmap_lock(mapping);
vma_interval_tree_insert(vma, &mapping->i_mmap);
flush_dcache_mmap_unlock(mapping);
mutex_unlock(&mapping->i_mmap_mutex);
i_mmap_unlock_write(mapping);
}
/* add the VMA to the tree */
@ -795,11 +795,11 @@ static void delete_vma_from_mm(struct vm_area_struct *vma)
if (vma->vm_file) {
mapping = vma->vm_file->f_mapping;
mutex_lock(&mapping->i_mmap_mutex);
i_mmap_lock_write(mapping);
flush_dcache_mmap_lock(mapping);
vma_interval_tree_remove(vma, &mapping->i_mmap);
flush_dcache_mmap_unlock(mapping);
mutex_unlock(&mapping->i_mmap_mutex);
i_mmap_unlock_write(mapping);
}
/* remove from the MM's tree and list */
@ -2094,14 +2094,14 @@ int nommu_shrink_inode_mappings(struct inode *inode, size_t size,
high = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
down_write(&nommu_region_sem);
mutex_lock(&inode->i_mapping->i_mmap_mutex);
i_mmap_lock_write(inode->i_mapping);
/* search for VMAs that fall within the dead zone */
vma_interval_tree_foreach(vma, &inode->i_mapping->i_mmap, low, high) {
/* found one - only interested if it's shared out of the page
* cache */
if (vma->vm_flags & VM_SHARED) {
mutex_unlock(&inode->i_mapping->i_mmap_mutex);
i_mmap_unlock_write(inode->i_mapping);
up_write(&nommu_region_sem);
return -ETXTBSY; /* not quite true, but near enough */
}
@ -2129,7 +2129,7 @@ int nommu_shrink_inode_mappings(struct inode *inode, size_t size,
}
}
mutex_unlock(&inode->i_mapping->i_mmap_mutex);
i_mmap_unlock_write(inode->i_mapping);
up_write(&nommu_region_sem);
return 0;
}

4
mm/rmap.c
View File

@ -1690,7 +1690,7 @@ static int rmap_walk_file(struct page *page, struct rmap_walk_control *rwc)
if (!mapping)
return ret;
mutex_lock(&mapping->i_mmap_mutex);
i_mmap_lock_write(mapping);
vma_interval_tree_foreach(vma, &mapping->i_mmap, pgoff, pgoff) {
unsigned long address = vma_address(page, vma);
@ -1713,7 +1713,7 @@ static int rmap_walk_file(struct page *page, struct rmap_walk_control *rwc)
ret = rwc->file_nonlinear(page, mapping, rwc->arg);
done:
mutex_unlock(&mapping->i_mmap_mutex);
i_mmap_unlock_write(mapping);
return ret;
}