From: Li Chen <chenl311@chinatelecom.cn>

This three-patch series tidies dm-pcache’s build glue and tightens the metadata scan.

Patch 1 allow dm-pcache to be linked into vmlinux and avoids clashing with the sunrpc
cache_flush() by using obj-$(CONFIG_DM_PCACHE) and renaming the helper across the tree.

Patch 2 drops a redundant recomputation of the metadata slot pointer while walking headers.

Patch 3 zero-allocates a temporary buffer so callers never see stale metadata,
relies on __free(kvfree) for cleanup, and only copies back once a valid record is found.

Thanks for your review.

Li Chen (3):
  dm-pcache: allow built-in build and rename flush helper
  dm-pcache: reuse meta_addr in pcache_meta_find_latest
  dm-pcache: avoid leaking invalid metadata in pcache_meta_find_latest()

 drivers/md/dm-pcache/Makefile          |  2 +-
 drivers/md/dm-pcache/cache.c           |  2 +-
 drivers/md/dm-pcache/cache.h           |  2 +-
 drivers/md/dm-pcache/cache_req.c       |  6 +++---
 drivers/md/dm-pcache/pcache_internal.h | 15 ++++++++++-----
 5 files changed, 16 insertions(+), 11 deletions(-)

-- 
2.51.0