On 29.10.25 11:09, Kevin Brodsky wrote:
Architectures currently opt in for implementing lazy_mmu helpers by
defining __HAVE_ARCH_ENTER_LAZY_MMU_MODE.
In preparation for introducing a generic lazy_mmu layer that will
require storage in task_struct, let's switch to a cleaner approach:
instead of defining a macro, select a CONFIG option.
This patch introduces CONFIG_ARCH_HAS_LAZY_MMU_MODE and has each
arch select it when it implements lazy_mmu helpers.
__HAVE_ARCH_ENTER_LAZY_MMU_MODE is removed and <linux/pgtable.h>
relies on the new CONFIG instead.
On x86, lazy_mmu helpers are only implemented if PARAVIRT_XXL is
selected. This creates some complications in arch/x86/boot/, because
a few files manually undefine PARAVIRT* options. As a result
<asm/paravirt.h> does not define the lazy_mmu helpers, but this
breaks the build as <linux/pgtable.h> only defines them if
!CONFIG_ARCH_HAS_LAZY_MMU_MODE. There does not seem to be a clean
way out of this - let's just undefine that new CONFIG too.
Signed-off-by: Kevin Brodsky <[email protected]>
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Acked-by: David Hildenbrand <[email protected]>
--
Cheers
David / dhildenb
