Adapt the rseq.c/rseq.h code to follow GNU C library changes introduced by:
glibc commit 2e456ccf0c34 ("Linux: Make __rseq_size useful for feature detection (bug 31965)")
Without this fix, rseq selftests for mm_cid fail:
./run_param_test.sh
Default parameters
Running test spinlock
Running compare-twice test spinlock
Running mm_cid test spinlock
Error: cpu id getter unavailable
[ This is based on the following branch:
https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git
branch: fixes ]
Fixes: 18c2355838e7 ("selftests/rseq: Implement rseq mm_cid field support")
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CC: Boqun Feng <boqun.feng@xxxxxxxxx>
CC: "Paul E. McKenney" <paulmck@xxxxxxxxxx>
Cc: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
CC: Carlos O'Donell <carlos@xxxxxxxxxx>
CC: Florian Weimer <fweimer@xxxxxxxxxx>
CC: linux-kselftest@xxxxxxxxxxxxxxx
CC: stable@xxxxxxxxxxxxxxx
---
tools/testing/selftests/rseq/rseq.c | 110 +++++++++++++++++++---------
tools/testing/selftests/rseq/rseq.h | 10 +--
2 files changed, 77 insertions(+), 43 deletions(-)