From fd3e42fcc888a773572282575d2fdbf5cfd6216e Mon Sep 17 00:00:00 2001 From: Hugh Dickins Date: Sat, 29 Oct 2005 18:16:06 -0700 Subject: [PATCH] [PATCH] mm: dup_mmap use oldmm more Use the parent's oldmm throughout dup_mmap, instead of perversely going back to current->mm. (Can you hear the sigh of relief from those mpnts? Usually I squash them, but not today.) Signed-off-by: Hugh Dickins Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/fork.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/kernel/fork.c b/kernel/fork.c index 2048ed7b5872..0e7fe4a8a8df 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -182,16 +182,16 @@ static struct task_struct *dup_task_struct(struct task_struct *orig) } #ifdef CONFIG_MMU -static inline int dup_mmap(struct mm_struct * mm, struct mm_struct * oldmm) +static inline int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm) { - struct vm_area_struct * mpnt, *tmp, **pprev; + struct vm_area_struct *mpnt, *tmp, **pprev; struct rb_node **rb_link, *rb_parent; int retval; unsigned long charge; struct mempolicy *pol; down_write(&oldmm->mmap_sem); - flush_cache_mm(current->mm); + flush_cache_mm(oldmm); mm->locked_vm = 0; mm->mmap = NULL; mm->mmap_cache = NULL; @@ -204,7 +204,7 @@ static inline int dup_mmap(struct mm_struct * mm, struct mm_struct * oldmm) rb_parent = NULL; pprev = &mm->mmap; - for (mpnt = current->mm->mmap ; mpnt ; mpnt = mpnt->vm_next) { + for (mpnt = oldmm->mmap; mpnt; mpnt = mpnt->vm_next) { struct file *file; if (mpnt->vm_flags & VM_DONTCOPY) { @@ -265,7 +265,7 @@ static inline int dup_mmap(struct mm_struct * mm, struct mm_struct * oldmm) rb_parent = &tmp->vm_rb; mm->map_count++; - retval = copy_page_range(mm, current->mm, tmp); + retval = copy_page_range(mm, oldmm, tmp); spin_unlock(&mm->page_table_lock); if (tmp->vm_ops && tmp->vm_ops->open) @@ -277,7 +277,7 @@ static inline int dup_mmap(struct mm_struct * mm, struct mm_struct * oldmm) retval = 0; out: - flush_tlb_mm(current->mm); + flush_tlb_mm(oldmm); up_write(&oldmm->mmap_sem); return retval; fail_nomem_policy: -- 2.20.1