On 4/7/15 4:13 AM, Daniel Borkmann wrote:
[ Cc'ing Dave, fyi ]
On 04/07/2015 11:05 AM, Stephen Rothwell wrote:
On Tue, 07 Apr 2015 10:56:13 +0200 Daniel Borkmann
<daniel@xxxxxxxxxxxxx> wrote:
On 04/07/2015 10:48 AM, Ingo Molnar wrote:
* Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
After merging the tip tree, today's linux-next build (powerpc
ppc64_defconfig) failed like this:
kernel/events/core.c: In function 'perf_event_set_bpf_prog':
kernel/events/core.c:6732:15: error: 'struct bpf_prog_aux' has no
member named 'prog_type'
if (prog->aux->prog_type != BPF_PROG_TYPE_KPROBE) {
^
Caused by commit 2541517c32be ("tracing, perf: Implement BPF programs
attached to kprobes").
Note, this must be some (rarely triggered) aspect of the ppc64
defconfig that neither x86 randconfigs nor most other arch defconfigs
expose?
Note, this is a merge conflict with the work that went via net-next
tree,
i.e. 24701ecea76b ("ebpf: move read-only fields to bpf_prog and shrink
bpf_prog_aux"). I believe that is why it didn't trigger on tip tree.
You should be able to resolve it in linux-next by changing the test to:
if (prog->prog_type != BPF_PROG_TYPE_KPROBE) {
Thanks Daniel, I will do that tomorrow. Someone will have to remember
to tell Linus.
Yes, indeed, depending which tree is merged first.
Daniel analysis is correct, but the fix for kernel/events/core.c
should be:
- if (prog->aux->prog_type != BPF_PROG_TYPE_KPROBE) {
+ if (prog->type != BPF_PROG_TYPE_KPROBE) {
instead of 'prog->prog_type'
Thanks Stephen!
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