diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/rseq.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/kernel/rseq.c b/kernel/rseq.c index 07c324d5a201..bf75268580ef 100644 --- a/kernel/rseq.c +++ b/kernel/rseq.c @@ -483,3 +483,20 @@ SYSCALL_DEFINE4(rseq, struct rseq __user *, rseq, u32, rseq_len, int, flags, u32 efault: return -EFAULT; } + +#ifdef CONFIG_RSEQ_SLICE_EXTENSION +DEFINE_STATIC_KEY_TRUE(rseq_slice_extension_key); + +static int __init rseq_slice_cmdline(char *str) +{ + bool on; + + if (kstrtobool(str, &on)) + return 0; + + if (!on) + static_branch_disable(&rseq_slice_extension_key); + return 1; +} +__setup("rseq_slice_ext=", rseq_slice_cmdline); +#endif /* CONFIG_RSEQ_SLICE_EXTENSION */ |