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powerpc/32: refactor pmd_offset(pud_offset(pgd_offset...

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At several places pmd pointer is retrieved through the same action:

	pmd = pmd_offset(pud_offset(pgd_offset(mm, addr), addr), addr);

or

	pmd = pmd_offset(pud_offset(pgd_offset_k(addr), addr), addr);

Refactor this by implementing two helpers pmd_ptr() and pmd_ptr_k()

This will help when adding the p4d level.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/7b065c5be35726af4066cab238ee35cabceda1fa.1578558199.git.christophe.leroy@c-s.fr
This commit is contained in:
Christophe Leroy
2020-01-09 08:25:25 +00:00
committed by Michael Ellerman
parent 05642cf728
commit 0b1c524caa
7 changed files with 23 additions and 12 deletions
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12
arch/powerpc/include/asm/pgtable.h
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@@ -41,6 +41,18 @@ struct mm_struct;
#ifndef __ASSEMBLY__
#ifdef CONFIG_PPC32
static inline pmd_t *pmd_ptr(struct mm_struct *mm, unsigned long va)
{
return pmd_offset(pud_offset(pgd_offset(mm, va), va), va);
}
static inline pmd_t *pmd_ptr_k(unsigned long va)
{
return pmd_offset(pud_offset(pgd_offset_k(va), va), va);
}
#endif
#include <asm/tlbflush.h>
/* Keep these as a macros to avoid include dependency mess */