On Thu, Sep 1, 2022 at 1:21 PM Kent Overstreet
[off-list ref] wrote:

On Thu, Sep 01, 2022 at 10:35:11AM -0700, Suren Baghdasaryan wrote:

quoted

Set ARCH_SUPPORTS_PER_VMA_LOCK so that the per-VMA lock support can be
compiled on this architecture.

Signed-off-by: Suren Baghdasaryan <surenb@google.com>
---
 arch/x86/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index f9920f1341c8..ee19de020b27 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig

@@ -27,6 +27,7 @@ config X86_64
      # Options that are inherently 64-bit kernel only:
      select ARCH_HAS_GIGANTIC_PAGE
      select ARCH_SUPPORTS_INT128 if CC_HAS_INT128
+     select ARCH_SUPPORTS_PER_VMA_LOCK
      select ARCH_USE_CMPXCHG_LOCKREF
      select HAVE_ARCH_SOFT_DIRTY
      select MODULES_USE_ELF_RELA

I think you could combine this with the previous path (and similarly on other
architectures) - they logically go together.

Thanks for the feedback! I see no downside to that, so unless there
are objections I will combine them in the next version.