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powerpc/nohash: Refactor pte_update()

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pte_update() is similar.

Take the nohash/32 version which works on nohash/64 and add the debug
call to assert_pte_locked() which is only on nohash/64.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/e01cb630cad42f645915ce7702d23985241b71fc.1695659959.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy
2023-09-25 20:31:26 +02:00
committed by Michael Ellerman
parent 0f4027eab5
commit 42a2722319
3 changed files with 42 additions and 50 deletions
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17
arch/powerpc/include/asm/nohash/64/pgtable.h
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@@ -171,23 +171,6 @@ static inline void p4d_set(p4d_t *p4dp, unsigned long val)
*p4dp = __p4d(val);
}
/* Atomic PTE updates */
static inline unsigned long pte_update(struct mm_struct *mm,
unsigned long addr,
pte_t *ptep, unsigned long clr,
unsigned long set,
int huge)
{
unsigned long old = pte_val(*ptep);
*ptep = __pte((old & ~clr) | set);
/* huge pages use the old page table lock */
if (!huge)
assert_pte_locked(mm, addr);
return old;
}
static inline int pte_young(pte_t pte)
{
return pte_val(pte) & _PAGE_ACCESSED;