[PATCH RFC v1] drivers/base/node: consolidate node device subsystem initialization in node_dev_init()

[Oscar Salvador]

On Fri, Jan 28, 2022 at 04:15:40PM +0100, David Hildenbrand wrote:
> ... and call node_dev_init() after memory_dev_init() from driver_init(),
> so before any of the existing arch/subsys calls. All online nodes should
> be known at that point.
> 
> This is in line with memory_dev_init(), which initializes the memory
> device subsystem and creates all memory block devices.
> 
> Similar to memory_dev_init(), panic() if anything goes wrong, we don't
> want to continue with such basic initialization errors.
> 
> The important part is that node_dev_init() gets called after
> memory_dev_init() and after cpu_dev_init(), but before any of the
> relevant archs call register_cpu() to register the new cpu device under
> the node device. The latter should be the case for the current users
> of topology_init().
> 
> Cc: Andrew Morton <akpm at linux-foundation.org>
> Cc: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
> Cc: Michal Hocko <mhocko at suse.com>
> Cc: Oscar Salvador <osalvador at suse.de>
> Cc: Catalin Marinas <catalin.marinas at arm.com>
> Cc: Will Deacon <will at kernel.org>
> Cc: Thomas Bogendoerfer <tsbogend at alpha.franken.de>
> Cc: Michael Ellerman <mpe at ellerman.id.au>
> Cc: Benjamin Herrenschmidt <benh at kernel.crashing.org>
> Cc: Paul Mackerras <paulus at samba.org>
> Cc: Paul Walmsley <paul.walmsley at sifive.com>
> Cc: Palmer Dabbelt <palmer at dabbelt.com>
> Cc: Albert Ou <aou at eecs.berkeley.edu>
> Cc: Heiko Carstens <hca at linux.ibm.com>
> Cc: Vasily Gorbik <gor at linux.ibm.com>
> Cc: Yoshinori Sato <ysato at users.sourceforge.jp>
> Cc: Rich Felker <dalias at libc.org>
> Cc: "David S. Miller" <davem at davemloft.net>
> Cc: Thomas Gleixner <tglx at linutronix.de>
> Cc: Ingo Molnar <mingo at redhat.com>
> Cc: Borislav Petkov <bp at alien8.de>
> Cc: Dave Hansen <dave.hansen at linux.intel.com>
> Cc: "Rafael J. Wysocki" <rafael at kernel.org>
> Cc: x86 at kernel.org
> Cc: linux-arm-kernel at lists.infradead.org
> Cc: linux-kernel at vger.kernel.org
> Cc: linux-ia64 at vger.kernel.org
> Cc: linux-mips at vger.kernel.org
> Cc: linuxppc-dev at lists.ozlabs.org
> Cc: linux-riscv at lists.infradead.org
> Cc: linux-s390 at vger.kernel.org
> Cc: linux-sh at vger.kernel.org
> Cc: sparclinux at vger.kernel.org
> Cc: linux-mm at kvack.org
> Signed-off-by: David Hildenbrand <david at redhat.com>

Reviewed-by: Oscar Salvador <osalvador at suse.de>


-- 
Oscar Salvador
SUSE Labs