Alexander Gordeev d08d4e7cd6 s390/mm: use full 4KB page for 2KB PTE ... Cease using 4KB pages to host two 2KB PTEs. That greatly simplifies the memory management code at the expense of page tables memory footprint. Instead of two PTEs per 4KB page use only upper half of the parent page for a single PTE. With that the list of half-used pages pgtable_list becomes unneeded. Further, the upper byte of the parent page _refcount counter does not need to be used for fragments tracking and could be left alone. Commit 8211dad627 ("s390: add pte_free_defer() for pgtables sharing page") introduced the use of PageActive flag to coordinate a deferred free with 2KB page table fragments tracking. Since there is no tracking anymore, there is no need for using PageActive flag. Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Reviewed-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>		2023-11-05 22:34:58 +01:00
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asm	s390/mm: use full 4KB page for 2KB PTE	2023-11-05 22:34:58 +01:00
uapi/asm	ARM:	2023-09-07 13:52:20 -07:00