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Subject[PATCH 19/21] mm: Convert i_mmap_lock and anon_vma->lock to mutexes
Straight fwd conversion of i_mmap_lock and anon_vma->lock to mutexes.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
---
arch/x86/mm/hugetlbpage.c | 4 ++--
fs/gfs2/main.c | 2 +-
fs/hugetlbfs/inode.c | 4 ++--
fs/inode.c | 2 +-
fs/nilfs2/page.c | 2 +-
include/linux/fs.h | 2 +-
include/linux/mm.h | 2 +-
include/linux/rmap.h | 12 ++++++------
kernel/fork.c | 4 ++--
mm/filemap_xip.c | 4 ++--
mm/fremap.c | 4 ++--
mm/hugetlb.c | 12 ++++++------
mm/memory-failure.c | 4 ++--
mm/memory.c | 14 +++++++-------
mm/migrate.c | 4 ++--
mm/mmap.c | 18 +++++++++---------
mm/mremap.c | 4 ++--
mm/rmap.c | 22 +++++++++++-----------
18 files changed, 60 insertions(+), 60 deletions(-)
Index: linux-2.6/arch/x86/mm/hugetlbpage.c
===================================================================
--- linux-2.6.orig/arch/x86/mm/hugetlbpage.c
+++ linux-2.6/arch/x86/mm/hugetlbpage.c
@@ -72,7 +72,7 @@ static void huge_pmd_share(struct mm_str
if (!vma_shareable(vma, addr))
return;

- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_lock);
vma_prio_tree_foreach(svma, &iter, &mapping->i_mmap, idx, idx) {
if (svma == vma)
continue;
@@ -97,7 +97,7 @@ static void huge_pmd_share(struct mm_str
put_page(virt_to_page(spte));
spin_unlock(&mm->page_table_lock);
out:
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_lock);
}

/*
Index: linux-2.6/fs/hugetlbfs/inode.c
===================================================================
--- linux-2.6.orig/fs/hugetlbfs/inode.c
+++ linux-2.6/fs/hugetlbfs/inode.c
@@ -413,10 +413,10 @@ static int hugetlb_vmtruncate(struct ino
pgoff = offset >> PAGE_SHIFT;

i_size_write(inode, offset);
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_lock);
if (!prio_tree_empty(&mapping->i_mmap))
hugetlb_vmtruncate_list(&mapping->i_mmap, pgoff);
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_lock);
truncate_hugepages(inode, offset);
return 0;
}
Index: linux-2.6/fs/inode.c
===================================================================
--- linux-2.6.orig/fs/inode.c
+++ linux-2.6/fs/inode.c
@@ -295,7 +295,7 @@ void inode_init_once(struct inode *inode
INIT_LIST_HEAD(&inode->i_lru);
INIT_RADIX_TREE(&inode->i_data.page_tree, GFP_ATOMIC);
spin_lock_init(&inode->i_data.tree_lock);
- spin_lock_init(&inode->i_data.i_mmap_lock);
+ mutex_init(&inode->i_data.i_mmap_lock);
INIT_LIST_HEAD(&inode->i_data.private_list);
spin_lock_init(&inode->i_data.private_lock);
INIT_RAW_PRIO_TREE_ROOT(&inode->i_data.i_mmap);
Index: linux-2.6/include/linux/fs.h
===================================================================
--- linux-2.6.orig/include/linux/fs.h
+++ linux-2.6/include/linux/fs.h
@@ -635,7 +635,7 @@ struct address_space {
unsigned int i_mmap_writable;/* count VM_SHARED mappings */
struct prio_tree_root i_mmap; /* tree of private and shared mappings */
struct list_head i_mmap_nonlinear;/*list VM_NONLINEAR mappings */
- spinlock_t i_mmap_lock; /* protect tree, count, list */
+ struct mutex i_mmap_lock; /* protect tree, count, list */
unsigned int truncate_count; /* Cover race condition with truncate */
unsigned long nrpages; /* number of total pages */
pgoff_t writeback_index;/* writeback starts here */
Index: linux-2.6/include/linux/mm.h
===================================================================
--- linux-2.6.orig/include/linux/mm.h
+++ linux-2.6/include/linux/mm.h
@@ -768,7 +768,7 @@ struct zap_details {
struct address_space *check_mapping; /* Check page->mapping if set */
pgoff_t first_index; /* Lowest page->index to unmap */
pgoff_t last_index; /* Highest page->index to unmap */
- spinlock_t *i_mmap_lock; /* For unmap_mapping_range: */
+ struct mutex *i_mmap_lock; /* For unmap_mapping_range: */
unsigned long truncate_count; /* Compare vm_truncate_count */
};

Index: linux-2.6/include/linux/rmap.h
===================================================================
--- linux-2.6.orig/include/linux/rmap.h
+++ linux-2.6/include/linux/rmap.h
@@ -7,7 +7,7 @@
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/mm.h>
-#include <linux/spinlock.h>
+#include <linux/mutex.h>
#include <linux/memcontrol.h>

/*
@@ -26,7 +26,7 @@
*/
struct anon_vma {
struct anon_vma *root; /* Root of this anon_vma tree */
- spinlock_t lock; /* Serialize access to vma list */
+ struct mutex lock; /* Serialize access to vma list */
/*
* The refcount is taken on an anon_vma when there is no
* guarantee that the vma of page tables will exist for
@@ -93,24 +93,24 @@ static inline void vma_lock_anon_vma(str
{
struct anon_vma *anon_vma = vma->anon_vma;
if (anon_vma)
- spin_lock(&anon_vma->root->lock);
+ mutex_lock(&anon_vma->root->lock);
}

static inline void vma_unlock_anon_vma(struct vm_area_struct *vma)
{
struct anon_vma *anon_vma = vma->anon_vma;
if (anon_vma)
- spin_unlock(&anon_vma->root->lock);
+ mutex_unlock(&anon_vma->root->lock);
}

static inline void anon_vma_lock(struct anon_vma *anon_vma)
{
- spin_lock(&anon_vma->root->lock);
+ mutex_lock(&anon_vma->root->lock);
}

static inline void anon_vma_unlock(struct anon_vma *anon_vma)
{
- spin_unlock(&anon_vma->root->lock);
+ mutex_unlock(&anon_vma->root->lock);
}

/*
Index: linux-2.6/kernel/fork.c
===================================================================
--- linux-2.6.orig/kernel/fork.c
+++ linux-2.6/kernel/fork.c
@@ -370,7 +370,7 @@ static int dup_mmap(struct mm_struct *mm
get_file(file);
if (tmp->vm_flags & VM_DENYWRITE)
atomic_dec(&inode->i_writecount);
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_lock);
if (tmp->vm_flags & VM_SHARED)
mapping->i_mmap_writable++;
tmp->vm_truncate_count = mpnt->vm_truncate_count;
@@ -378,7 +378,7 @@ static int dup_mmap(struct mm_struct *mm
/* insert tmp into the share list, just after mpnt */
vma_prio_tree_add(tmp, mpnt);
flush_dcache_mmap_unlock(mapping);
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_lock);
}

/*
Index: linux-2.6/mm/filemap_xip.c
===================================================================
--- linux-2.6.orig/mm/filemap_xip.c
+++ linux-2.6/mm/filemap_xip.c
@@ -183,7 +183,7 @@ __xip_unmap (struct address_space * mapp
return;

retry:
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_lock);
vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
mm = vma->vm_mm;
address = vma->vm_start +
@@ -201,7 +201,7 @@ __xip_unmap (struct address_space * mapp
page_cache_release(page);
}
}
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_lock);

if (locked) {
mutex_unlock(&xip_sparse_mutex);
Index: linux-2.6/mm/fremap.c
===================================================================
--- linux-2.6.orig/mm/fremap.c
+++ linux-2.6/mm/fremap.c
@@ -211,13 +211,13 @@ SYSCALL_DEFINE5(remap_file_pages, unsign
}
goto out;
}
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_lock);
flush_dcache_mmap_lock(mapping);
vma->vm_flags |= VM_NONLINEAR;
vma_prio_tree_remove(vma, &mapping->i_mmap);
vma_nonlinear_insert(vma, &mapping->i_mmap_nonlinear);
flush_dcache_mmap_unlock(mapping);
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_lock);
}

if (vma->vm_flags & VM_LOCKED) {
Index: linux-2.6/mm/hugetlb.c
===================================================================
--- linux-2.6.orig/mm/hugetlb.c
+++ linux-2.6/mm/hugetlb.c
@@ -2316,9 +2316,9 @@ void __unmap_hugepage_range(struct vm_ar
void unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end, struct page *ref_page)
{
- spin_lock(&vma->vm_file->f_mapping->i_mmap_lock);
+ mutex_lock(&vma->vm_file->f_mapping->i_mmap_lock);
__unmap_hugepage_range(vma, start, end, ref_page);
- spin_unlock(&vma->vm_file->f_mapping->i_mmap_lock);
+ mutex_unlock(&vma->vm_file->f_mapping->i_mmap_lock);
}

/*
@@ -2350,7 +2350,7 @@ static int unmap_ref_private(struct mm_s
* this mapping should be shared between all the VMAs,
* __unmap_hugepage_range() is called as the lock is already held
*/
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_lock);
vma_prio_tree_foreach(iter_vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
/* Do not unmap the current VMA */
if (iter_vma == vma)
@@ -2368,7 +2368,7 @@ static int unmap_ref_private(struct mm_s
address, address + huge_page_size(h),
page);
}
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_lock);

return 1;
}
@@ -2850,7 +2850,7 @@ void hugetlb_change_protection(struct vm
BUG_ON(address >= end);
flush_cache_range(vma, address, end);

- spin_lock(&vma->vm_file->f_mapping->i_mmap_lock);
+ mutex_lock(&vma->vm_file->f_mapping->i_mmap_lock);
spin_lock(&mm->page_table_lock);
for (; address < end; address += huge_page_size(h)) {
ptep = huge_pte_offset(mm, address);
@@ -2865,7 +2865,7 @@ void hugetlb_change_protection(struct vm
}
}
spin_unlock(&mm->page_table_lock);
- spin_unlock(&vma->vm_file->f_mapping->i_mmap_lock);
+ mutex_unlock(&vma->vm_file->f_mapping->i_mmap_lock);

flush_tlb_range(vma, start, end);
}
Index: linux-2.6/mm/memory-failure.c
===================================================================
--- linux-2.6.orig/mm/memory-failure.c
+++ linux-2.6/mm/memory-failure.c
@@ -428,7 +428,7 @@ static void collect_procs_file(struct pa
*/

read_lock(&tasklist_lock);
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_lock);
for_each_process(tsk) {
pgoff_t pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT);

@@ -448,7 +448,7 @@ static void collect_procs_file(struct pa
add_to_kill(tsk, page, vma, to_kill, tkc);
}
}
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_lock);
read_unlock(&tasklist_lock);
}

Index: linux-2.6/mm/memory.c
===================================================================
--- linux-2.6.orig/mm/memory.c
+++ linux-2.6/mm/memory.c
@@ -1177,7 +1177,7 @@ unsigned long unmap_vmas(struct mmu_gath
{
long zap_work = ZAP_BLOCK_SIZE;
unsigned long start = start_addr;
- spinlock_t *i_mmap_lock = details? details->i_mmap_lock: NULL;
+ struct mutex *i_mmap_lock = details ? details->i_mmap_lock : NULL;
struct mm_struct *mm = vma->vm_mm;

mmu_notifier_invalidate_range_start(mm, start_addr, end_addr);
@@ -1227,7 +1227,7 @@ unsigned long unmap_vmas(struct mmu_gath
}

if (need_resched() ||
- (i_mmap_lock && spin_needbreak(i_mmap_lock))) {
+ (i_mmap_lock && mutex_is_contended(i_mmap_lock))) {
if (i_mmap_lock)
goto out;
cond_resched();
@@ -2522,7 +2522,7 @@ static int unmap_mapping_range_vma(struc

restart_addr = zap_page_range(vma, start_addr,
end_addr - start_addr, details);
- need_break = need_resched() || spin_needbreak(details->i_mmap_lock);
+ need_break = need_resched() || mutex_is_contended(details->i_mmap_lock);

if (restart_addr >= end_addr) {
/* We have now completed this vma: mark it so */
@@ -2536,9 +2536,9 @@ static int unmap_mapping_range_vma(struc
goto again;
}

- spin_unlock(details->i_mmap_lock);
+ mutex_unlock(details->i_mmap_lock);
cond_resched();
- spin_lock(details->i_mmap_lock);
+ mutex_lock(details->i_mmap_lock);
return -EINTR;
}

@@ -2634,7 +2634,7 @@ void unmap_mapping_range(struct address_
details.last_index = ULONG_MAX;
details.i_mmap_lock = &mapping->i_mmap_lock;

- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_lock);

/* Protect against endless unmapping loops */
mapping->truncate_count++;
@@ -2649,7 +2649,7 @@ void unmap_mapping_range(struct address_
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);
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_lock);
}
EXPORT_SYMBOL(unmap_mapping_range);

Index: linux-2.6/mm/mmap.c
===================================================================
--- linux-2.6.orig/mm/mmap.c
+++ linux-2.6/mm/mmap.c
@@ -217,9 +217,9 @@ void unlink_file_vma(struct vm_area_stru

if (file) {
struct address_space *mapping = file->f_mapping;
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_lock);
__remove_shared_vm_struct(vma, file, mapping);
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_lock);
}
}

@@ -456,7 +456,7 @@ static void vma_link(struct mm_struct *m
mapping = vma->vm_file->f_mapping;

if (mapping) {
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_lock);
vma->vm_truncate_count = mapping->truncate_count;
}

@@ -464,7 +464,7 @@ static void vma_link(struct mm_struct *m
__vma_link_file(vma);

if (mapping)
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_lock);

mm->map_count++;
validate_mm(mm);
@@ -567,7 +567,7 @@ again: remove_next = 1 + (end > next->
mapping = file->f_mapping;
if (!(vma->vm_flags & VM_NONLINEAR))
root = &mapping->i_mmap;
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_lock);
if (importer &&
vma->vm_truncate_count != next->vm_truncate_count) {
/*
@@ -641,7 +641,7 @@ again: remove_next = 1 + (end > next->
if (anon_vma)
anon_vma_unlock(anon_vma);
if (mapping)
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_lock);

if (remove_next) {
if (file) {
@@ -2500,7 +2500,7 @@ static void vm_lock_anon_vma(struct mm_s
* The LSB of head.next can't change from under us
* because we hold the mm_all_locks_mutex.
*/
- spin_lock_nest_lock(&anon_vma->root->lock, &mm->mmap_sem);
+ mutex_lock_nest_lock(&anon_vma->root->lock, &mm->mmap_sem);
/*
* We can safely modify head.next after taking the
* anon_vma->root->lock. If some other vma in this mm shares
@@ -2530,7 +2530,7 @@ static void vm_lock_mapping(struct mm_st
*/
if (test_and_set_bit(AS_MM_ALL_LOCKS, &mapping->flags))
BUG();
- spin_lock_nest_lock(&mapping->i_mmap_lock, &mm->mmap_sem);
+ mutex_lock_nest_lock(&mapping->i_mmap_lock, &mm->mmap_sem);
}
}

@@ -2629,7 +2629,7 @@ static void vm_unlock_mapping(struct add
* AS_MM_ALL_LOCKS can't change to 0 from under us
* because we hold the mm_all_locks_mutex.
*/
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_lock);
if (!test_and_clear_bit(AS_MM_ALL_LOCKS,
&mapping->flags))
BUG();
Index: linux-2.6/mm/mremap.c
===================================================================
--- linux-2.6.orig/mm/mremap.c
+++ linux-2.6/mm/mremap.c
@@ -90,7 +90,7 @@ static void move_ptes(struct vm_area_str
* and we propagate stale pages into the dst afterward.
*/
mapping = vma->vm_file->f_mapping;
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_lock);
if (new_vma->vm_truncate_count &&
new_vma->vm_truncate_count != vma->vm_truncate_count)
new_vma->vm_truncate_count = 0;
@@ -122,7 +122,7 @@ static void move_ptes(struct vm_area_str
pte_unmap(new_pte - 1);
pte_unmap_unlock(old_pte - 1, old_ptl);
if (mapping)
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_lock);
mmu_notifier_invalidate_range_end(vma->vm_mm, old_start, old_end);
}

Index: linux-2.6/mm/rmap.c
===================================================================
--- linux-2.6.orig/mm/rmap.c
+++ linux-2.6/mm/rmap.c
@@ -302,7 +302,7 @@ static void anon_vma_ctor(void *data)
{
struct anon_vma *anon_vma = data;

- spin_lock_init(&anon_vma->lock);
+ mutex_init(&anon_vma->lock);
atomic_set(&anon_vma->refcount, 0);
INIT_LIST_HEAD(&anon_vma->head);
}
@@ -641,7 +641,7 @@ static int page_referenced_file(struct p
*/
BUG_ON(!PageLocked(page));

- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_lock);

/*
* i_mmap_lock does not stabilize mapcount at all, but mapcount
@@ -666,7 +666,7 @@ static int page_referenced_file(struct p
break;
}

- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_lock);
return referenced;
}

@@ -753,7 +753,7 @@ static int page_mkclean_file(struct addr

BUG_ON(PageAnon(page));

- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_lock);
vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
if (vma->vm_flags & VM_SHARED) {
unsigned long address = vma_address(page, vma);
@@ -762,7 +762,7 @@ static int page_mkclean_file(struct addr
ret += page_mkclean_one(page, vma, address);
}
}
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_lock);
return ret;
}

@@ -1327,7 +1327,7 @@ static int try_to_unmap_file(struct page
unsigned long max_nl_size = 0;
unsigned int mapcount;

- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_lock);
vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
unsigned long address = vma_address(page, vma);
if (address == -EFAULT)
@@ -1373,7 +1373,7 @@ static int try_to_unmap_file(struct page
mapcount = page_mapcount(page);
if (!mapcount)
goto out;
- cond_resched_lock(&mapping->i_mmap_lock);
+ cond_resched();

max_nl_size = (max_nl_size + CLUSTER_SIZE - 1) & CLUSTER_MASK;
if (max_nl_cursor == 0)
@@ -1395,7 +1395,7 @@ static int try_to_unmap_file(struct page
}
vma->vm_private_data = (void *) max_nl_cursor;
}
- cond_resched_lock(&mapping->i_mmap_lock);
+ cond_resched();
max_nl_cursor += CLUSTER_SIZE;
} while (max_nl_cursor <= max_nl_size);

@@ -1407,7 +1407,7 @@ static int try_to_unmap_file(struct page
list_for_each_entry(vma, &mapping->i_mmap_nonlinear, shared.vm_set.list)
vma->vm_private_data = NULL;
out:
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_lock);
return ret;
}

@@ -1522,7 +1522,7 @@ static int rmap_walk_file(struct page *p

if (!mapping)
return ret;
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_lock);
vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
unsigned long address = vma_address(page, vma);
if (address == -EFAULT)
@@ -1536,7 +1536,7 @@ static int rmap_walk_file(struct page *p
* never contain migration ptes. Decide what to do about this
* limitation to linear when we need rmap_walk() on nonlinear.
*/
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_lock);
return ret;
}

Index: linux-2.6/fs/gfs2/main.c
===================================================================
--- linux-2.6.orig/fs/gfs2/main.c
+++ linux-2.6/fs/gfs2/main.c
@@ -62,7 +62,7 @@ static void gfs2_init_gl_aspace_once(voi
memset(mapping, 0, sizeof(*mapping));
INIT_RADIX_TREE(&mapping->page_tree, GFP_ATOMIC);
spin_lock_init(&mapping->tree_lock);
- spin_lock_init(&mapping->i_mmap_lock);
+ mutex_init(&mapping->i_mmap_lock);
INIT_LIST_HEAD(&mapping->private_list);
spin_lock_init(&mapping->private_lock);
INIT_RAW_PRIO_TREE_ROOT(&mapping->i_mmap);
Index: linux-2.6/fs/nilfs2/page.c
===================================================================
--- linux-2.6.orig/fs/nilfs2/page.c
+++ linux-2.6/fs/nilfs2/page.c
@@ -500,7 +500,7 @@ void nilfs_mapping_init_once(struct addr
INIT_LIST_HEAD(&mapping->private_list);
spin_lock_init(&mapping->private_lock);

- spin_lock_init(&mapping->i_mmap_lock);
+ mutex_init(&mapping->i_mmap_lock);
INIT_RAW_PRIO_TREE_ROOT(&mapping->i_mmap);
INIT_LIST_HEAD(&mapping->i_mmap_nonlinear);
}
Index: linux-2.6/mm/migrate.c
===================================================================
--- linux-2.6.orig/mm/migrate.c
+++ linux-2.6/mm/migrate.c
@@ -845,10 +845,10 @@ static int unmap_and_move_huge_page(new_
if (rc)
remove_migration_ptes(hpage, hpage);

- if (anon_vma && atomic_dec_and_lock(&anon_vma->refcount,
+ if (anon_vma && atomic_dec_and_mutex_lock(&anon_vma->refcount,
&anon_vma->lock)) {
int empty = list_empty(&anon_vma->head);
- spin_unlock(&anon_vma->lock);
+ mutex_unlock(&anon_vma->lock);
if (empty)
put_anon_vma(anon_vma);
}



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  Last update: 2010-11-26 16:09    [from the cache]
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