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b=Emln45ZbWCM7QQvnvlsfZ43WqX5pz05VeteZ/MTBRtyNPqZb+hLN+LffuwucTSzby ujMVmDLTG1sZOX4xFO54vrWhTnyhCFm8Dy42nhBLFEzbWLm5Aa2FqVc6HIC2+dJ+5B yJJhWBS3nPXXYDIOYv7k0lTEoj398Sr4KNjZazgMUFGx5H7HHx0hXMNzIOEX1U/PEM hy0VzPmD7+5XSE45HtWcpuzru0jmLKC1I6rViFSw5cPamii+2+5m+CFoPkcuAc4StC pVAL2HP0AYlACXFzMfMDWckJMmqJbzEaunEVMpLgcx0mSbG49zXsoXmaGd2JyJ0kYn 5UYO7bmk/XXkA== Message-ID: Date: Wed, 14 Jan 2026 10:46:02 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/8] mm/memory_hotplug: pass online_type to online_memory_block() via arg To: Gregory Price , linux-mm@kvack.org Cc: linux-cxl@vger.kernel.org, nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, kernel-team@meta.com, dan.j.williams@intel.com, vishal.l.verma@intel.com, dave.jiang@intel.com, mst@redhat.com, jasowang@redhat.com, xuanzhuo@linux.alibaba.com, eperezma@redhat.com, osalvador@suse.de, akpm@linux-foundation.org References: <20260114085201.3222597-1-gourry@gourry.net> <20260114085201.3222597-2-gourry@gourry.net> From: "David Hildenbrand (Red Hat)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: C6DA640006 X-Stat-Signature: tediafemrgh8r97hy4sgutgbfeneeuwg X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1768383969-726170 X-HE-Meta: U2FsdGVkX19P+mzy8qS0t3LYeHM/52PZ2NB7aj4d5sd0h7Wi59OhVJKC6SHvq0G1+NNtEFlstTOnIMgjuErV/COWY9NZro9Yj6gLZ6zrROcm+fspaYDgV/MCuvS/rcnbMCYCFrnFelYWhKNlofGgTx/eVtuCIjFU+vNZA7+s6l0QY1HiCE5bqCOhc2l39P2hhc1+lv0OaAU8ZLPFa6vFy2STHQlI7S8fAYjiV9voNrKkTHAA62lNZVYHdyJH3fgIMqh9bzKYceLgmoTVnh6s6f//5dRlAtJlqaH5ljN4akHUz32JCaPSx1E+I2ghzu1clfYobJBLJ3EArE0HHJnSJ9xqEAqbNt+KnFkH8IgjgmlAcO+CoWqkD2OM+6e7WYI6nV2SfSzIy0Bh1c1v9qF2nzYW4azxzgcbAM0ckXJnvswBS5dt5pJO0k7F5WUezQFJA2jKxM3iy+TS3gdGrnBP5ZK5VnDpm3HHTKs3BDtAvwD2BKFXbp4/CMRBuCnCoQZnzhXRSPpahrSPvwWhGftbcJzaPWoe/1Ai47m415YJHSrTl6LsGj6xRFrCnrqWAJQT8YNDy0vkP+XrJRz9Fxm8MckGoLAyW/KHZfyq1EAGTdeY0akysgRVaR+9Umd4GTvD5PaSJ0Drab9+Pnsh0XEqDnBKFVvy0C/YtaYRv+Yg/TCkgAmmjrGo6rQ4UIFdKu2oPCiLBHGT1gOggh4wMiraS6F6OPmiBbbNi8Cezfn3SXbZfg5FxBMwl0cFL6fLaPBj3IY9weuPN7z2XDE7YeJuqPS7/w6Cc0rvH/oGjzBe+8E92Z33wGQxme0B9KmPs2HelahxnN4LdPhX+DfOGQ77FMrT3lnx99aZi+uy8+fYk6WoPHF5exby8p38aY7JcwXHU3H10cPmCmNfw02qz2B6NHx/wiUbx0hcTh5yLINPlF8rYQMuMqug7AiTU4NMm6B8dHWBu1e8qpXc5ED+SBI PxdcNdXP TlXZCk3O+97tDjDW3AO6VsMPamEpsoP5L2Ht+xhnM3iDm+cVZqah+NJ+KVjp9IxmHnasra2YksH+xK4mtpcdjRMChJuJSSIRzso++WhDGnzhRO1IZT2HWKLAlJDorQyODyLC3UsreQSYfR+kuTA7+5n63tEvccfhxDIRHZmlU/1Po2O+xjdJ+bb1n2LetQTJfxtwGXGZcsBdG7SEtKuwagvZVUZ2GR/JIaBBTRHTmjPfenVD0u0PzNHyK8fO+uazGJYZdwAU/Cj1AMGe+vmGMLYC4PKLY3qW/bTW6W4w26o8k2Rjuhrv4LSVykc4lJz0ESWoDkFZvdRQTVy8q6gxx+wmQ/8XjURh8TKCXSWZFV4ZCzLE5CeC7c7vQLwkXLx/PKXR64t+e2poNqcE= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 1/14/26 09:51, Gregory Price wrote: > Modify online_memory_block() to accept the online type through its arg > parameter rather than calling mhp_get_default_online_type() internally. > This prepares for allowing callers to specify explicit online types. > > Update the caller in add_memory_resource() to pass the default online > type via a local variable. No functional change. > > Signed-off-by: Gregory Price > --- > mm/memory_hotplug.c | 12 +++++++++--- > 1 file changed, 9 insertions(+), 3 deletions(-) > > diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c > index 389989a28abe..5718556121f0 100644 > --- a/mm/memory_hotplug.c > +++ b/mm/memory_hotplug.c > @@ -1337,7 +1337,9 @@ static int check_hotplug_memory_range(u64 start, u64 size) > > static int online_memory_block(struct memory_block *mem, void *arg) > { > - mem->online_type = mhp_get_default_online_type(); > + int *online_type = arg; > + > + mem->online_type = *online_type; > return device_online(&mem->dev); > } > > @@ -1578,8 +1580,12 @@ int add_memory_resource(int nid, struct resource *res, mhp_t mhp_flags) > merge_system_ram_resource(res); > > /* online pages if requested */ > - if (mhp_get_default_online_type() != MMOP_OFFLINE) > - walk_memory_blocks(start, size, NULL, online_memory_block); > + if (mhp_get_default_online_type() != MMOP_OFFLINE) { > + int online_type = mhp_get_default_online_type(); > + > + walk_memory_blocks(start, size, &online_type, > + online_memory_block); I think you could just pass the value by casting to uintptr_t and back. Doesn't make a big difference here, though. Acked-by: David Hildenbrand (Red Hat) -- Cheers David