Unify many bits/mman.h headers

[Szabolcs Nagy]

On 13/09/18 16:53, Joseph Myers wrote:
> Many bits/mman.h headers for Linux architectures have exactly the same
> contents, up to whitespace, comments and the number of leading 0s on
> constants.  Specifically, this applies to architectures that, in the
> Linux kernel, either have no uapi/asm/mman.h, or have one that
> includes asm-generic/mman.h without any changes or additions relevant
> to glibc (this last case is the one that applies to Arm).
> 
> It's not useful to have to duplicate the set of MAP_* constants in
> glibc for all such architectures and any new architectures with that
> property.  Thus, this patch creates a generic
> sysdeps/unix/sysv/linux/bits/mman.h and removes all the
> architecture-specific versions that become unnecessary.
> 
> Further unification remains possible after this patch.  For example,
> the new bits/mman.h could become bits/mman-map-flags-generic.h so that
> it could also be used by architecture-specific bits/mman.h headers on
> architectures that use the generic flags but add architecture-specific
> ones to them.  That would allow this common set of MAP_* definitions
> to be used on ia64 and x86 as well (architectures that include
> asm-generic/mman.h from their own uapi/asm/mman.h but define
> additional MAP_* values of their own).
> 
> Tested with build-many-glibcs.py.
> 
> 2018-09-13  Joseph Myers  <joseph@codesourcery.com>
> 
> 	* sysdeps/unix/sysv/linux/bits/mman.h: New file.
> 	* sysdeps/unix/sysv/linux/aarch64/bits/mman.h: Remove.

The aarch64 changes are OK.

> 	* sysdeps/unix/sysv/linux/arm/bits/mman.h: Likewise.
> 	* sysdeps/unix/sysv/linux/m68k/bits/mman.h: Likewise.
> 	* sysdeps/unix/sysv/linux/microblaze/bits/mman.h: Likewise.
> 	* sysdeps/unix/sysv/linux/nios2/bits/mman.h: Likewise.
> 	* sysdeps/unix/sysv/linux/riscv/bits/mman.h: Likewise.
> 	* sysdeps/unix/sysv/linux/s390/bits/mman.h: Likewise.
> 	* sysdeps/unix/sysv/linux/sh/bits/mman.h: Likewise.
>