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| author |   Josef Bacik <jbacik@fb.com> | 2017-12-15 21:42:57 -0500 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2017-12-17 20:47:32 +0100 |
| commit | 46df3d209db080395a98fc0875bd05e45e8f44e0 (patch) | |
| tree | f9a0fcd0e875ddaa5bf6317a2937d568e8417d07 /samples | |
| parent | nfp: set flags in the correct member of netdev_bpf (diff) | |
| download | linux-dev-46df3d209db080395a98fc0875bd05e45e8f44e0.tar.xz linux-dev-46df3d209db080395a98fc0875bd05e45e8f44e0.zip | |
trace: reenable preemption if we modify the ip
Things got moved around between the original bpf_override_return patches
and the final version, and now the ftrace kprobe dispatcher assumes if
you modified the ip that you also enabled preemption. Make a comment of
this and enable preemption, this fixes the lockdep splat that happened
when using this feature.
Fixes: 9802d86585db ("bpf: add a bpf_override_function helper")
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'samples')
0 files changed, 0 insertions, 0 deletions