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| author | Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> | 2017-10-23 22:07:38 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-10 13:40:43 +0100 |
| commit | 1ffabfc1d58ba586fa11cc3cde21d54afec03387 (patch) | |
| tree | e18960f2dd1016105d220e4bdd7cc2f2d4b42098 /drivers/pcmcia/tcic.h | |
| parent | f8d07852819a0c2da239fca155342b4f80f4aedf (diff) | |
| download | linux-rt-1ffabfc1d58ba586fa11cc3cde21d54afec03387.tar.gz | |
powerpc/kprobes: Disable preemption before invoking probe handler for optprobes
commit 8a2d71a3f2737e2448aa68de2b6052cb570d3d2a upstream.
Per Documentation/kprobes.txt, probe handlers need to be invoked with
preemption disabled. Update optimized_callback() to do so. Also move
get_kprobe_ctlblk() invocation post preemption disable, since it
accesses pre-cpu data.
This was not an issue so far since optprobes wasn't selected if
CONFIG_PREEMPT was enabled. Commit a30b85df7d599f ("kprobes: Use
synchronize_rcu_tasks() for optprobe with CONFIG_PREEMPT=y") changes
this.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pcmcia/tcic.h')
0 files changed, 0 insertions, 0 deletions