diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2020-02-24 15:01:42 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-02-24 16:20:09 -0800 |
| commit | 37e1d9202225635772b32e340294208367279c2b (patch) | |
| tree | fa994e5de8abf9a7007d9a11d67460b78cdefa2a | |
| parent | 3c58482a382bae89410439247152eb342e9872f7 (diff) | |
| download | linux-37e1d9202225635772b32e340294208367279c2b.tar.bz2 | |
bpf: Replace cant_sleep() with cant_migrate()
As already discussed in the previous change which introduced
BPF_RUN_PROG_PIN_ON_CPU() BPF only requires to disable migration to
guarantee per CPUness.
If RT substitutes the preempt disable based migration protection then the
cant_sleep() check will obviously trigger as preemption is not disabled.
Replace it by cant_migrate() which maps to cant_sleep() on a non RT kernel
and will verify that migration is disabled on a full RT kernel.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200224145643.583038889@linutronix.de
| -rw-r--r-- | include/linux/filter.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/filter.h b/include/linux/filter.h index 38f60188bb26..1982a52eb4c9 100644 --- a/include/linux/filter.h +++ b/include/linux/filter.h @@ -561,7 +561,7 @@ DECLARE_STATIC_KEY_FALSE(bpf_stats_enabled_key); #define __BPF_PROG_RUN(prog, ctx, dfunc) ({ \ u32 ret; \ - cant_sleep(); \ + cant_migrate(); \ if (static_branch_unlikely(&bpf_stats_enabled_key)) { \ struct bpf_prog_stats *stats; \ u64 start = sched_clock(); \ |