- get_vma_policy(task) is not safe if task != current, remove this argument.
- get_vma_policy() no longer has callers outside of mempolicy.c, make it static. Signed-off-by: Oleg Nesterov <[email protected]> --- include/linux/mempolicy.h | 2 -- mm/mempolicy.c | 19 ++++++++----------- 2 files changed, 8 insertions(+), 13 deletions(-) diff --git a/include/linux/mempolicy.h b/include/linux/mempolicy.h index e1abe24..3d385c8 100644 --- a/include/linux/mempolicy.h +++ b/include/linux/mempolicy.h @@ -137,8 +137,6 @@ struct mempolicy *mpol_shared_policy_lookup(struct shared_policy *sp, struct mempolicy *get_task_policy(struct task_struct *p); struct mempolicy *__get_vma_policy(struct vm_area_struct *vma, unsigned long addr); -struct mempolicy *get_vma_policy(struct task_struct *tsk, - struct vm_area_struct *vma, unsigned long addr); bool vma_policy_mof(struct vm_area_struct *vma); extern void numa_default_policy(void); diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 9695a9a..008fb32 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -1616,27 +1616,24 @@ struct mempolicy *__get_vma_policy(struct vm_area_struct *vma, } /* - * get_vma_policy(@task, @vma, @addr) - * @task: task for fallback if vma policy == default + * get_vma_policy(@vma, @addr) * @vma: virtual memory area whose policy is sought * @addr: address in @vma for shared policy lookup * * Returns effective policy for a VMA at specified address. - * Falls back to @task or system default policy, as necessary. - * Current or other task's task mempolicy and non-shared vma policies must be - * protected by task_lock(task) by the caller. + * Falls back to current->mempolicy or system default policy, as necessary. * Shared policies [those marked as MPOL_F_SHARED] require an extra reference * count--added by the get_policy() vm_op, as appropriate--to protect against * freeing by another task. It is the caller's responsibility to free the * extra reference for shared policies. */ -struct mempolicy *get_vma_policy(struct task_struct *task, - struct vm_area_struct *vma, unsigned long addr) +static struct mempolicy *get_vma_policy(struct vm_area_struct *vma, + unsigned long addr) { struct mempolicy *pol = __get_vma_policy(vma, addr); if (!pol) - pol = get_task_policy(task); + pol = get_task_policy(current); return pol; } @@ -1864,7 +1861,7 @@ struct zonelist *huge_zonelist(struct vm_area_struct *vma, unsigned long addr, { struct zonelist *zl; - *mpol = get_vma_policy(current, vma, addr); + *mpol = get_vma_policy(vma, addr); *nodemask = NULL; /* assume !MPOL_BIND */ if (unlikely((*mpol)->mode == MPOL_INTERLEAVE)) { @@ -2019,7 +2016,7 @@ alloc_pages_vma(gfp_t gfp, int order, struct vm_area_struct *vma, unsigned int cpuset_mems_cookie; retry_cpuset: - pol = get_vma_policy(current, vma, addr); + pol = get_vma_policy(vma, addr); cpuset_mems_cookie = read_mems_allowed_begin(); if (unlikely(pol->mode == MPOL_INTERLEAVE)) { @@ -2285,7 +2282,7 @@ int mpol_misplaced(struct page *page, struct vm_area_struct *vma, unsigned long BUG_ON(!vma); - pol = get_vma_policy(current, vma, addr); + pol = get_vma_policy(vma, addr); if (!(pol->flags & MPOL_F_MOF)) goto out; -- 1.5.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
