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Thu, 16 May 2024 20:25:34 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id mjGYC75rRmZjDAAAD6G6ig (envelope-from ); Thu, 16 May 2024 20:25:34 +0000 Date: Thu, 16 May 2024 22:25:28 +0200 From: Oscar Salvador To: glaubitz@physik.fu-berlin.de Cc: geert+renesas@glider.be, david@redhat.com, linux-sh@vger.kernel.org Subject: drop memory-hotplug on superH Message-ID: Precedence: bulk X-Mailing-List: linux-sh@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Spam-Level: X-Spamd-Result: default: False [-2.98 / 50.00]; BAYES_HAM(-2.97)[99.88%]; SUSPICIOUS_RECIPS(1.50)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; MISSING_XM_UA(0.00)[]; TAGGED_RCPT(0.00)[renesas]; MIME_TRACE(0.00)[0:+]; FUZZY_BLOCKED(0.00)[rspamd.com]; RCVD_TLS_ALL(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns,suse.de:dkim]; TO_DN_NONE(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; DKIM_TRACE(0.00)[suse.de:+] X-Rspamd-Action: no action X-Rspamd-Queue-Id: 8365B34EED X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Spam-Flag: NO X-Spam-Score: -2.98 Hi, After talking to Adrian Glaubitz about superH and memory-hotplug, he mentioned that currently superH runs only on 32bits (there was a 64bit version but no is longer supported?). The thing is that since the below commit commit 7ec58a2b941ed88986694d037e38012738323171 Author: David Hildenbrand Date: Fri Nov 5 13:44:28 2021 -0700 mm/memory_hotplug: restrict CONFIG_MEMORY_HOTPLUG to 64 bit we no longer support memory-hotplug on 32bit platforms, so let us drop the memory-hotplug code for superH because it is a no-op at the moment. If there is ever a 64bit platform again, we shall re-implement it, and we shall do it on CONFIG_SPARSEMEM_VMEMMAP, since we plan do make memory-hotplug dependant on that, and drop support for CONFIG_SPARSEMEM && !CONFIG_SPARSEMEM_VMEMMAP environments. I prepared two patches at [1] that drop the code and the CONFIG_MEMORY_HOTPLUG_foo from the Kconfigs. Let me know if you are fine with that and I shall send it. Thanks [1] https://github.com/leberus/linux/tree/deprecate-memhotplug-sh -- Oscar Salvador SUSE Labs