On 2/11/26 11:31, Mike Rapoport wrote:
From: "Mike Rapoport (Microsoft)" <[email protected]>
For most architectures every invocation of ZERO_PAGE() does
virt_to_page(empty_zero_page). But empty_zero_page is in BSS and it is
enough to get its struct page once at initialization time and then use
it whenever a zero page should be accessed.
Add yet another __zero_page variable that will be initialized as
virt_to_page(empty_zero_page) for most architectures in a weak
arch_setup_zero_pages() function.
For architectures that use colored zero pages (MIPS and s390) rename their
setup_zero_pages() to arch_setup_zero_pages() and make it global rather
than static.
For architectures that cannot use virt_to_page() for BSS (arm64 and
sparc64) add override of arch_setup_zero_pages().
Acked-by: Catalin Marinas <[email protected]>
Signed-off-by: Mike Rapoport (Microsoft) <[email protected]>
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Acked-by: David Hildenbrand (Arm) <[email protected]>
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Cheers,
David
