runtime: make lockRank an int64 instead of an int

Might use more space in staticlockranking experiment on 32-bit
systems. But as the major use of this type is in lockRankStruct
where we have to pad on 32-bit systems anyway, not a big deal.
rwmutex does get bigger, but that's already pretty big.

Getting rid of the padding in lockRankStruct makes that type smaller
on 64-bit systems. Which is the point of this CL.

Fixes #79947

Change-Id: Ide26da94a36fe9c231359e375d7acef1c901fc7a
Reviewed-on: https://go-review.googlesource.com/c/go/+/789460
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Keith Randall <khr@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
4 files changed
tree: ecda5baf0779a773f425a599914d818eb408a2e7
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. codereview.cfg
  11. CONTRIBUTING.md
  12. go.env
  13. LICENSE
  14. PATENTS
  15. README.md
  16. SECURITY.md
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