mhp_flag MHP_OFFLINE_INACCESSIBLE was used to mark memory as not
accessible until memory hotplug online phase begins.

Earlier, standby memory blocks were added upfront during boottime and
MHP_OFFLINE_INACCESSIBLE flag avoided page_init_poison() on memmap
during mhp addtion phase.

However with dynamic runtime configuration of memory, standby memory can
be brought to accessible state before performing add_memory(). Hence,
remove MHP_OFFLINE_INACCESSIBLE.

Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
---
 drivers/s390/char/sclp_mem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/s390/char/sclp_mem.c b/drivers/s390/char/sclp_mem.c
index 802439230294..f49b8457e721 100644
--- a/drivers/s390/char/sclp_mem.c
+++ b/drivers/s390/char/sclp_mem.c
@@ -267,7 +267,7 @@ static ssize_t config_mblock_store(struct kobject *kobj, struct kobj_attribute *
 		__arch_set_page_nodat((void *)__va(addr), block_size >> PAGE_SHIFT);
 		rc = __add_memory(0, addr, block_size,
 				  mblock->memmap_on_memory ?
-				  MHP_MEMMAP_ON_MEMORY | MHP_OFFLINE_INACCESSIBLE : MHP_NONE);
+				  MHP_MEMMAP_ON_MEMORY : MHP_NONE);
 		if (rc)
 			goto out_unlock;
 		mem = find_memory_block(pfn_to_section_nr(PFN_DOWN(addr)));
-- 
2.48.1

On 26.09.25 15:15, Sumanth Korikkar wrote:
> mhp_flag MHP_OFFLINE_INACCESSIBLE was used to mark memory as not
> accessible until memory hotplug online phase begins.
> 
> Earlier, standby memory blocks were added upfront during boottime and
> MHP_OFFLINE_INACCESSIBLE flag avoided page_init_poison() on memmap
> during mhp addtion phase.
> 
> However with dynamic runtime configuration of memory, standby memory can
> be brought to accessible state before performing add_memory(). Hence,
> remove MHP_OFFLINE_INACCESSIBLE.
> 
> Acked-by: Heiko Carstens <hca@linux.ibm.com>
> Signed-off-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
> ---

Reviewed-by: David Hildenbrand <david@redhat.com>

-- 
Cheers

David / dhildenb