[Bug libc/31430] New: glibc doesn't define MAP_UNINITIALIZED

[Bug libc/31430] New: glibc doesn't define MAP_UNINITIALIZED

[stefan.smorra at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=31430

            Bug ID: 31430
           Summary: glibc doesn't define MAP_UNINITIALIZED
           Product: glibc
           Version: 2.39
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: stefan.smorra at gmail dot com
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

When you look into Linux 'man mmap' you'll find MAP_UNINITIALIZED which exists
for roughly 14 years (in the Linux kernel).

However when I include sys/mman.h it says MAP_UNINITIALIZED is undeclared.

I am not 100% sure if this is a bug in glibc or intention.

I searched the web, mailing lists, stackoverflow and the glibc source code and
found nothing about why this macro is undefined in glibc.

The only comment about this flag is in tst-mman-consts.py. It says
MAP_UNINITIALIZED is kernel only. Does that mean glibc doesn't support Linux
only features? I am not sure.

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug libc/31430] glibc doesn't define MAP_UNINITIALIZED

[stefan.smorra at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=31430

--- Comment #1 from steph123 <stefan.smorra at gmail dot com> ---
In the glibc documentation MAP_UNINITIALIZED is also not found.

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug libc/31430] glibc doesn't define MAP_UNINITIALIZED

[schwab@linux-m68k.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=31430

--- Comment #2 from Andreas Schwab <schwab@linux-m68k.org> ---
MAP_UNINITIALIZED is specific to nommu, and ignored in a normal kernel.

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug libc/31430] glibc doesn't define MAP_UNINITIALIZED

[stefan.smorra at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=31430

--- Comment #3 from steph123 <stefan.smorra at gmail dot com> ---
Does that mean glibc doesn't want to support this flag?

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug libc/31430] glibc doesn't define MAP_UNINITIALIZED

[schwab@linux-m68k.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=31430

--- Comment #4 from Andreas Schwab <schwab@linux-m68k.org> ---
glibc does not support nommu.

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug libc/31430] glibc doesn't define MAP_UNINITIALIZED

[stefan.smorra at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=31430

--- Comment #5 from steph123 <stefan.smorra at gmail dot com> ---
That's all I wanted to know thanks...

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug libc/31430] glibc doesn't define MAP_UNINITIALIZED

[stefan.smorra at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=31430

steph123 <stefan.smorra at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |NOTABUG

--- Comment #6 from steph123 <stefan.smorra at gmail dot com> ---
This is not a bug. See previous comments.

-- 
You are receiving this mail because:
You are on the CC list for the bug.