[lkml]   [2022]   [Dec]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 2/5] nolibc: add support for s390
On Sat, Dec 10, 2022 at 10:34:08AM +0100, Sven Schnelle wrote:
> Whoops. One of my colleagues suggested that i should name the file
> arch-390x.h. Reason for this is that the architecture name "s390"
> describes the 31bit (compat) architecture mode in userspace, and "s390x"
> the 64 bit mode. To make it a bit more complicated, the architecture in
> the kernel is named "s390". That's because in the beginning the kernel
> could run in 31bit or 64 bit mode, and there can be only one
> architecture name. When support for running 31bit kernels was removed
> years ago, the architecture name s390 was kept because renaming the
> architecture would have been quite some fun. So in short:
> Kernel s390 == 64 bit only
> Userspace s390 == 31 bit
> Userspace s390x == 64 bit

OK, that might be why it's always a bit confusing to me :-)

> So i tried renaming the header file, noted that the Makefile just uses:
> nolibc_arch := $(patsubst arm64,aarch64,$(ARCH))
> arch_file := arch-$(nolibc_arch).h
> which would then need special handling. Obviously i failed to revert the
> change completely during rebase.
> So it should be:
> >> +#elif defined(__s390x__)
> >> +#include "arch-s390.h"
> I'm fine with both - either you fixing it up or me sending a v2.

As you like. If you prefer to rename the file to s390x as your colleague
suggested, I'll then ask you to send a v2. Otherwise either Paul or I can
drop that 'x' in the #include.


 \ /
  Last update: 2022-12-10 10:38    [W:0.092 / U:0.100 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site