[PATCH v2 0/4] refactor the ringtest testing for ptr_ring

[Yunsheng Lin]

tools/include/* has a lot of abstract layer for building
kernel code from userspace, so reuse or add the abstract
layer in tools/include/ to build the ptr_ring for ringtest
testing.

The same abstract layer can be used to build the ptr_ring
for ptr_ring benchmark app too, see [1].

1. https://lkml.org/lkml/2021/7/1/275

V2:
1. rebased on the Eugenio's patchset and split patch 1 to
   more reviewable ones.
2. only add the interface used by ringtest, so that the
   added code can be built and tested.
3. cpu_relax() only support x86 and arm64 now.
4. use 64 bytes as the default SMP_CACHE_BYTES.

Yunsheng Lin (4):
  tools headers UAPI: add cache aligning related macro
  tools headers UAPI: add kmalloc/vmalloc related interface
  tools headers UAPI: add cpu_relax() implementation for x86 and arm64
  tools/virtio: use common infrastructure to build ptr_ring.h

 tools/include/asm/processor.h    |  26 ++++++++++
 tools/include/linux/cache.h      |  25 ++++++++++
 tools/include/linux/gfp.h        |   2 +
 tools/include/linux/slab.h       |  46 ++++++++++++++++++
 tools/virtio/ringtest/Makefile   |   2 +-
 tools/virtio/ringtest/main.h     |  99 +++-----------------------------------
 tools/virtio/ringtest/ptr_ring.c | 101 ++-------------------------------------
 7 files changed, 109 insertions(+), 192 deletions(-)
 create mode 100644 tools/include/asm/processor.h
 create mode 100644 tools/include/linux/cache.h
 create mode 100644 tools/include/linux/slab.h

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2.7.4