x86/mm: Add prot_sethuge() helper to abstract out _PAGE_PSE handling

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We still have some historic cases of direct fiddling of page
attributes with (dangerous & fragile) type casting and address shifting.

Add the prot_sethuge() helper instead that gets the types right and
doesn't have to transform addresses.

( Also add a debug check to make sure this doesn't get applied
  to _PAGE_BIT_PAT/_PAGE_BIT_PAT_LARGE pages. )

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Dave Hansen <dave.hansen@intel.com>

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Linus Torvalds 2022-09-28 09:30:31 +02:00 • committed by Ingo Molnar

parent a3d3163fbe

commit 334b2cea81

1 changed files with 10 additions and 9 deletions

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arch/x86/mm/init_64.c

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