um: Output messages to stderr and support quiet option

Hello,

Here is version 3 of um-quiet series. In this version I just fixed some printf format issues.

V2 is here.

https://lkml.org/lkml/2017/5/8/35

This series fixes some boot time printf output to stderr by adding os_info() and os_warn(). The information-level messages via os_info() are suppressed when "quiet" kernel option is specified.
Also the last one allows user to pass "console=" option to kernel.

Note that the output of --help and --version are still sent to stdout since they are intentionally shown by the user.

Changes from v2:
- Cast rlim_min/max to unsigned long long explicitly for avoiding printf-format warning.
- Fix printf format in physmem.c so that it matches the type of arguments.

Thank you,

---

Masami Hiramatsu (6):
um: Use printk instead of printf in make_uml_dir
um: Add os_info() for pre-boot information messages
um: Use os_info for the messages on normal path
um: Add os_warn() for pre-boot warning/error messages
um: Use os_warn to print out pre-boot warning/error messages
um: console: Ignore console= option

 arch/um/drivers/stdio_console.c |    3 +++
 arch/um/include/shared/os.h     |    4 ++++
 arch/um/kernel/physmem.c        |   10 +++++-----
 arch/um/kernel/um_arch.c        |   16 +++++++++-------
 arch/um/kernel/umid.c           |    4 ++--
 arch/um/os-Linux/execvp.c       |    2 +-
 arch/um/os-Linux/main.c         |    9 ++++-----
 arch/um/os-Linux/mem.c          |   28 ++++++++++++++--------------
 arch/um/os-Linux/start_up.c     |   28 +++++++++++++++-------------
 arch/um/os-Linux/umid.c         |   19 +++++++++++--------
 arch/um/os-Linux/util.c         |   34 ++++++++++++++++++++++++++++++++++
 11 files changed, 102 insertions(+), 55 deletions(-)

--
Masami Hiramatsu <[email protected]>