Hi all- This is v2, and this time around everything is tagged for -stable.
Changes from v1: - patch 1: comment fixes from Mathier - patch 2: improved comments - patch 3: split out as a separate patch - patch 4: now has a proper explanation Mathieu, I think we have to make sync_core sync the caller. See patch 4. Andy Lutomirski (4): x86/membarrier: Get rid of a dubious optimization membarrier: Add an actual barrier before rseq_preempt() membarrier: Explicitly sync remote cores when SYNC_CORE is requested membarrier: Execute SYNC_CORE on the calling thread arch/x86/include/asm/sync_core.h | 9 ++-- arch/x86/mm/tlb.c | 10 ++++- kernel/sched/membarrier.c | 75 ++++++++++++++++++++++++-------- 3 files changed, 71 insertions(+), 23 deletions(-) -- 2.28.0
