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mempolicy: rename mpol_copy to mpol_dup

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This patch renames mpol_copy() to mpol_dup() because, well, that's what it
does.  Like, e.g., strdup() for strings, mpol_dup() takes a pointer to an
existing mempolicy, allocates a new one and copies the contents.

In a later patch, I want to use the name mpol_copy() to copy the contents from
one mempolicy to another like, e.g., strcpy() does for strings.

Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Andi Kleen <ak@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:
Lee Schermerhorn 2008-04-28 02:13:09 -07:00 committed by Linus Torvalds
parent f0be3d32b0
commit 846a16bf0f
5 changed files with 16 additions and 16 deletions
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14
include/linux/mempolicy.h
View file

@ -73,10 +73,10 @@ struct mm_struct;
* Mempolicy objects are reference counted. A mempolicy will be freed when
* mpol_put() decrements the reference count to zero.
*
* Copying policy objects:
* mpol_copy() allocates a new mempolicy and copies the specified mempolicy
* Duplicating policy objects:
* mpol_dup() allocates a new mempolicy and copies the specified mempolicy
* to the new storage. The reference count of the new object is initialized
* to 1, representing the caller of mpol_copy().
* to 1, representing the caller of mpol_dup().
*/
struct mempolicy {
atomic_t refcnt;
@ -105,11 +105,11 @@ static inline void mpol_put(struct mempolicy *pol)
__mpol_put(pol);
}
extern struct mempolicy *__mpol_copy(struct mempolicy *pol);
static inline struct mempolicy *mpol_copy(struct mempolicy *pol)
extern struct mempolicy *__mpol_dup(struct mempolicy *pol);
static inline struct mempolicy *mpol_dup(struct mempolicy *pol)
{
if (pol)
pol = __mpol_copy(pol);
pol = __mpol_dup(pol);
return pol;
}
@ -198,7 +198,7 @@ static inline void mpol_get(struct mempolicy *pol)
{
}
static inline struct mempolicy *mpol_copy(struct mempolicy *old)
static inline struct mempolicy *mpol_dup(struct mempolicy *old)
{
return NULL;
}

4
kernel/cpuset.c
View file

@ -941,7 +941,7 @@ static int update_nodemask(struct cpuset *cs, char *buf)
cs->mems_generation = cpuset_mems_generation++;
mutex_unlock(&callback_mutex);
cpuset_being_rebound = cs; /* causes mpol_copy() rebind */
cpuset_being_rebound = cs; /* causes mpol_dup() rebind */
fudge = 10; /* spare mmarray[] slots */
fudge += cpus_weight(cs->cpus_allowed); /* imagine one fork-bomb/cpu */
@ -992,7 +992,7 @@ static int update_nodemask(struct cpuset *cs, char *buf)
* rebind the vma mempolicies of each mm in mmarray[] to their
* new cpuset, and release that mm. The mpol_rebind_mm()
* call takes mmap_sem, which we couldn't take while holding
* tasklist_lock. Forks can happen again now - the mpol_copy()
* tasklist_lock. Forks can happen again now - the mpol_dup()
* cpuset_being_rebound check will catch such forks, and rebind
* their vma mempolicies too. Because we still hold the global
* cgroup_mutex, we know that no other rebind effort will

4
kernel/fork.c
View file

@ -279,7 +279,7 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
if (!tmp)
goto fail_nomem;
*tmp = *mpnt;
pol = mpol_copy(vma_policy(mpnt));
pol = mpol_dup(vma_policy(mpnt));
retval = PTR_ERR(pol);
if (IS_ERR(pol))
goto fail_nomem_policy;
@ -1116,7 +1116,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
p->audit_context = NULL;
cgroup_fork(p);
#ifdef CONFIG_NUMA
p->mempolicy = mpol_copy(p->mempolicy);
p->mempolicy = mpol_dup(p->mempolicy);
if (IS_ERR(p->mempolicy)) {
retval = PTR_ERR(p->mempolicy);
p->mempolicy = NULL;

6
mm/mempolicy.c
View file

@ -1566,15 +1566,15 @@ struct page *alloc_pages_current(gfp_t gfp, unsigned order)
EXPORT_SYMBOL(alloc_pages_current);
/*
* If mpol_copy() sees current->cpuset == cpuset_being_rebound, then it
* If mpol_dup() sees current->cpuset == cpuset_being_rebound, then it
* rebinds the mempolicy its copying by calling mpol_rebind_policy()
* with the mems_allowed returned by cpuset_mems_allowed(). This
* keeps mempolicies cpuset relative after its cpuset moves. See
* further kernel/cpuset.c update_nodemask().
*/
/* Slow path of a mempolicy copy */
struct mempolicy *__mpol_copy(struct mempolicy *old)
/* Slow path of a mempolicy duplicate */
struct mempolicy *__mpol_dup(struct mempolicy *old)
{
struct mempolicy *new = kmem_cache_alloc(policy_cache, GFP_KERNEL);

4
mm/mmap.c
View file

@ -1810,7 +1810,7 @@ int split_vma(struct mm_struct * mm, struct vm_area_struct * vma,
new->vm_pgoff += ((addr - vma->vm_start) >> PAGE_SHIFT);
}
pol = mpol_copy(vma_policy(vma));
pol = mpol_dup(vma_policy(vma));
if (IS_ERR(pol)) {
kmem_cache_free(vm_area_cachep, new);
return PTR_ERR(pol);
@ -2126,7 +2126,7 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap,
new_vma = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
if (new_vma) {
*new_vma = *vma;
pol = mpol_copy(vma_policy(vma));
pol = mpol_dup(vma_policy(vma));
if (IS_ERR(pol)) {
kmem_cache_free(vm_area_cachep, new_vma);
return NULL;