| From: Petr Vorel <pvorel@suse.cz> |
| Subject: kernel/utsname_sysctl.c: print kernel arch |
| Date: Thu, 1 Sep 2022 21:44:03 +0200 |
| |
| Print the machine hardware name (UTS_MACHINE) in /proc/sys/kernel/arch. |
| |
| This helps people who debug kernel with initramfs with minimal environment |
| (i.e. without coreutils or even busybox) or allow to open sysfs file |
| instead of run 'uname -m' in high level languages. |
| |
| Link: https://lkml.kernel.org/r/20220901194403.3819-1-pvorel@suse.cz |
| Signed-off-by: Petr Vorel <pvorel@suse.cz> |
| Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| Cc: David Sterba <dsterba@suse.com> |
| Cc: "Eric W . Biederman" <ebiederm@xmission.com> |
| Cc: Rafael J. Wysocki <rafael@kernel.org> |
| Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
| --- |
| |
| Documentation/admin-guide/sysctl/kernel.rst | 5 +++++ |
| kernel/utsname_sysctl.c | 7 +++++++ |
| 2 files changed, 12 insertions(+) |
| |
| --- a/Documentation/admin-guide/sysctl/kernel.rst~kernel-utsname_sysctlc-print-kernel-arch |
| +++ a/Documentation/admin-guide/sysctl/kernel.rst |
| @@ -65,6 +65,11 @@ combining the following values: |
| 4 s3_beep |
| = ======= |
| |
| +arch |
| +==== |
| + |
| +The machine hardware name, the same output as ``uname -m`` |
| +(e.g. ``x86_64`` or ``aarch64``). |
| |
| auto_msgmni |
| =========== |
| --- a/kernel/utsname_sysctl.c~kernel-utsname_sysctlc-print-kernel-arch |
| +++ a/kernel/utsname_sysctl.c |
| @@ -74,6 +74,13 @@ static DEFINE_CTL_TABLE_POLL(domainname_ |
| |
| static struct ctl_table uts_kern_table[] = { |
| { |
| + .procname = "arch", |
| + .data = init_uts_ns.name.machine, |
| + .maxlen = sizeof(init_uts_ns.name.machine), |
| + .mode = 0444, |
| + .proc_handler = proc_do_uts_string, |
| + }, |
| + { |
| .procname = "ostype", |
| .data = init_uts_ns.name.sysname, |
| .maxlen = sizeof(init_uts_ns.name.sysname), |
| _ |
