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powerpc/mm: move ioremap_prot() into ioremap.c

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Both ioremap_prot() are idenfical, move them into ioremap.c

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/0b3eb0e0f1490a99fd6c983e166fb8946233f151.1566309262.git.christophe.leroy@c-s.fr
This commit is contained in:
Christophe Leroy
2019-08-20 14:07:15 +00:00
committed by Michael Ellerman
parent 4634c375db
commit edfe1a5679
3 changed files with 19 additions and 41 deletions
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19
arch/powerpc/mm/ioremap.c
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@@ -34,3 +34,22 @@ void __iomem *ioremap_coherent(phys_addr_t addr, unsigned long size)
return iowa_ioremap(addr, size, prot, caller);
return __ioremap_caller(addr, size, prot, caller);
}
void __iomem *ioremap_prot(phys_addr_t addr, unsigned long size, unsigned long flags)
{
pte_t pte = __pte(flags);
void *caller = __builtin_return_address(0);
/* writeable implies dirty for kernel addresses */
if (pte_write(pte))
pte = pte_mkdirty(pte);
/* we don't want to let _PAGE_USER and _PAGE_EXEC leak out */
pte = pte_exprotect(pte);
pte = pte_mkprivileged(pte);
if (iowa_is_active())
return iowa_ioremap(addr, size, pte_pgprot(pte), caller);
return __ioremap_caller(addr, size, pte_pgprot(pte), caller);
}
EXPORT_SYMBOL(ioremap_prot);