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| author | Oleg Nesterov <oleg@redhat.com> | 2012-05-29 21:28:57 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-06-06 17:15:17 +0200 |
| commit | 3a9ea0520f38def4a3915b91f82455b749f07d88 (patch) | |
| tree | 810a4d5bb6f075497ad3b2cd94c120ae235e026f /lib/decompress.c | |
| parent | a3d7bb47937b3a40b9f0c75655e97b3bb6407cbe (diff) | |
| download | op-kernel-dev-3a9ea0520f38def4a3915b91f82455b749f07d88.zip op-kernel-dev-3a9ea0520f38def4a3915b91f82455b749f07d88.tar.gz | |
uprobes: Introduce find_active_uprobe() helper
No functional changes. Move the "find uprobe" code from
handle_swbp() to the new helper, find_active_uprobe().
Note: with or without this change, the find-active-uprobe logic
is not exactly right. We can race with another thread which
unmaps the memory with the valid uprobe before we take
mm->mmap_sem. We can't find this uprobe simply because
find_vma() fails. In this case we wrongly assume that this trap
was not caused by uprobe and send the erroneous SIGTRAP. See the
next changes.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Anton Arapov <anton@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20120529192857.GC8057@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'lib/decompress.c')
0 files changed, 0 insertions, 0 deletions
