diff options
Diffstat (limited to 'arch/x86/events/intel/bts.c')
| -rw-r--r-- | arch/x86/events/intel/bts.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/x86/events/intel/bts.c b/arch/x86/events/intel/bts.c index 6a3b599ee0fe..974e917e65b2 100644 --- a/arch/x86/events/intel/bts.c +++ b/arch/x86/events/intel/bts.c @@ -58,7 +58,7 @@ struct bts_buffer { local_t head; unsigned long end; void **data_pages; - struct bts_phys buf[0]; + struct bts_phys buf[]; }; static struct pmu bts_pmu; @@ -209,6 +209,12 @@ static void bts_update(struct bts_ctx *bts) } else { local_set(&buf->data_size, head); } + + /* + * Since BTS is coherent, just add compiler barrier to ensure + * BTS updating is ordered against bts::handle::event. + */ + barrier(); } static int @@ -594,7 +600,7 @@ static __init int bts_init(void) * we cannot use the user mapping since it will not be available * if we're not running the owning process. * - * With PTI we can't use the kernal map either, because its not + * With PTI we can't use the kernel map either, because its not * there when we run userspace. * * For now, disable this driver when using PTI. |