RFR: 8254144: Non-x86 Zero builds fail with return-type warning in os_linux_zero.cpp [v2]

[Aleksey Shipilev]

> Pretty trivial: missing `return` statement for non-void returning function. GCC complains about it in 11u, but not in
> HEAD. Still, I believe we should fix it everywhere.
> Testing:
>  - [x] Linux Zero arm32 build, HEAD
>  - [x] Linux Zero arm32 build, 11u

Aleksey Shipilev has updated the pull request incrementally with one additional commit since the last revision:

  Use the common style for compiler silencing comments

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/539/files
  - new: https://git.openjdk.java.net/jdk/pull/539/files/f15e4839..a6ea0c5d

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=539&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=539&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/539.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/539/head:pull/539

PR: https://git.openjdk.java.net/jdk/pull/539