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powerpc/mm: don't use _PAGE_EXEC in book3s/32 

book3s/32 doesn't define _PAGE_EXEC, so no need to use it.

All other platforms define _PAGE_EXEC so no need to check
it is not NUL when not book3s/32.

Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2018-10-09 13:51:47 +00:00 committed by Michael Ellerman
parent c766ee7223
commit d81e6f8b7c
2 changed files with 4 additions and 4 deletions
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2
arch/powerpc/include/asm/book3s/32/pgtable.h
View File

@ -234,7 +234,7 @@ static inline void __ptep_set_access_flags(struct vm_area_struct *vma,
int psize)
{
unsigned long set = pte_val(entry) &
(_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW | _PAGE_EXEC);
(_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW);
unsigned long clr = ~pte_val(entry) & _PAGE_RO;
pte_update(ptep, clr, set);

6
arch/powerpc/mm/pgtable.c
View File

@ -73,7 +73,7 @@ static struct page *maybe_pte_to_page(pte_t pte)
return page;
}
#if defined(CONFIG_PPC_STD_MMU) || _PAGE_EXEC == 0
#ifdef CONFIG_PPC_BOOK3S
/* Server-style MMU handles coherency when hashing if HW exec permission
* is supposed per page (currently 64-bit only). If not, then, we always
@ -106,7 +106,7 @@ static pte_t set_access_flags_filter(pte_t pte, struct vm_area_struct *vma,
return pte;
}
#else /* defined(CONFIG_PPC_STD_MMU) || _PAGE_EXEC == 0 */
#else /* CONFIG_PPC_BOOK3S */
/* Embedded type MMU with HW exec support. This is a bit more complicated
* as we don't have two bits to spare for _PAGE_EXEC and _PAGE_HWEXEC so
@ -179,7 +179,7 @@ static pte_t set_access_flags_filter(pte_t pte, struct vm_area_struct *vma,
return __pte(pte_val(pte) | _PAGE_EXEC);
}
#endif /* !(defined(CONFIG_PPC_STD_MMU) || _PAGE_EXEC == 0) */
#endif /* CONFIG_PPC_BOOK3S */
/*
* set_pte stores a linux PTE into the linux page table.