From f1a45d023193f7d8e55e384090b645d609325393 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Mon, 6 Aug 2012 14:13:23 +0200 Subject: uprobes: Kill dup_mmap()->uprobe_mmap(), simplify uprobe_mmap/munmap 1. Kill dup_mmap()->uprobe_mmap(), it was only needed to calculate new_mm->uprobes_state.count removed by the previous patch. If the forking process has a pending uprobe (int3) in vma, it will be copied by copy_page_range(), note that it checks vma->anon_vma so "Don't copy ptes" is not possible after install_breakpoint() which does anon_vma_prepare(). 2. Remove is_swbp_at_addr() and "int count" in uprobe_mmap(). Again, this was needed for uprobes_state.count. As a side effect this fixes the bug pointed out by Srikar, this code lacked the necessary put_uprobe(). 3. uprobe_munmap() becomes a nop after the previous patch. Remove the meaningless code but do not remove the helper, we will need it. Signed-off-by: Oleg Nesterov Acked-by: Srikar Dronamraju --- kernel/fork.c | 3 --- 1 file changed, 3 deletions(-) (limited to 'kernel/fork.c') diff --git a/kernel/fork.c b/kernel/fork.c index 2c8857e1285..912b6f6fe5b 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -454,9 +454,6 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm) if (retval) goto out; - - if (file) - uprobe_mmap(tmp); } /* a new mm has just been created */ arch_dup_mmap(oldmm, mm); -- cgit v1.2.3-70-g09d2