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| author | Oleg Nesterov <[email protected]> | 2012-08-06 12:13:23 +0000 |
|---|---|---|
| committer | Oleg Nesterov <[email protected]> | 2012-08-28 16:21:17 +0000 |
| commit | f1a45d023193f7d8e55e384090b645d609325393 (patch) | |
| tree | 7f901f3dbd23a7602bf3d4bf774862a3ee5b7640 /tools/perf/util/scripting-engines/trace-event-perl.c | |
| parent | uprobes: Kill uprobes_state->count (diff) | |
| download | kernel-f1a45d023193f7d8e55e384090b645d609325393.tar.gz kernel-f1a45d023193f7d8e55e384090b645d609325393.zip | |
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 <[email protected]>
Acked-by: Srikar Dronamraju <[email protected]>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-perl.c')
0 files changed, 0 insertions, 0 deletions