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powerpc/pgtable: Drop PTE_ATOMIC_UPDATES

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40x was the last user of PTE_ATOMIC_UPDATES.

Drop everything related to PTE_ATOMIC_UPDATES.

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/dbe8438fd1ed3e500132c8ab70269d4e6cc84531.1590079968.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy 2020-05-21 16:55:54 +00:00 committed by Michael Ellerman
parent 2c74e2586b
commit 4e1df545e2
1 changed files with 0 additions and 15 deletions
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15
arch/powerpc/include/asm/nohash/32/pgtable.h
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@ -259,25 +259,10 @@ static inline pte_basic_t pte_update(struct mm_struct *mm, unsigned long addr, p
static inline pte_basic_t pte_update(struct mm_struct *mm, unsigned long addr, pte_t *p,
unsigned long clr, unsigned long set, int huge)
{
#if defined(PTE_ATOMIC_UPDATES) && !defined(CONFIG_PTE_64BIT)
unsigned long old, tmp;
__asm__ __volatile__("\
1: lwarx %0,0,%3\n\
andc %1,%0,%4\n\
or %1,%1,%5\n"
PPC405_ERR77(0,%3)
" stwcx. %1,0,%3\n\
bne- 1b"
: "=&r" (old), "=&r" (tmp), "=m" (*p)
: "r" (p), "r" (clr), "r" (set), "m" (*p)
: "cc" );
#else /* PTE_ATOMIC_UPDATES */
pte_basic_t old = pte_val(*p);
pte_basic_t new = (old & ~(pte_basic_t)clr) | set;
*p = __pte(new);
#endif /* !PTE_ATOMIC_UPDATES */
#ifdef CONFIG_44x
if ((old & _PAGE_USER) && (old & _PAGE_EXEC))