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Message-ID: <87bnncq2vz.fsf@linux.vnet.ibm.com>
Date: Tue, 09 Dec 2014 20:36:08 +0530
From: "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To: Michael Ellerman <mpe@...erman.id.au>,
LEROY Christophe <christophe.leroy@....fr>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>, scottwood@...escale.com
Cc: linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: powerpc32: missing accessors to pgprot_t objects
Michael Ellerman <mpe@...erman.id.au> writes:
> On Mon, 2014-08-12 at 14:16:29 UTC, LEROY Christophe wrote:
>> Compilation with #define STRICT_MM_TYPECHECKS in arch/powerpc/include/asm/page.h
>> fails due to missing use of pgprot_val() when using pgprot_t objects.
>
> Hmm, looks like 64 bit doesn't build either.
>
> Aneesh I think you added this, mind fixing it up?
>
> In file included from ../arch/powerpc/include/asm/thread_info.h:34:0,
> from ../include/linux/thread_info.h:54,
> from ../include/asm-generic/preempt.h:4,
> from arch/powerpc/include/generated/asm/preempt.h:1,
> from ../include/linux/preempt.h:18,
> from ../include/linux/spinlock.h:50,
> from ../include/linux/mmzone.h:7,
> from ../include/linux/gfp.h:5,
> from ../include/linux/mm.h:9,
> from ../arch/powerpc/mm/tlb_hash64.c:25:
> ../arch/powerpc/mm/tlb_hash64.c: In function ‘__flush_hash_table_range’:
> ../arch/powerpc/include/asm/page.h:286:24: error: request for member ‘pte’ in something not a structure or union
> #define pte_val(x) ((x).pte)
> ^
> ../arch/powerpc/mm/tlb_hash64.c:219:37: note: in expansion of macro ‘pte_val’
> trace_hugepage_invalidate(start, pte_val(pte));
> ^
> make[2]: *** [arch/powerpc/mm/tlb_hash64.o] Error 1
>
Will send a proper patch after compile testing with other configs. The
kvm hunk is really ugly, will try to rework.
diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/include/asm/kvm_book3s_64.h
index 0aa8179..cd0ff37 100644
--- a/arch/powerpc/include/asm/kvm_book3s_64.h
+++ b/arch/powerpc/include/asm/kvm_book3s_64.h
@@ -291,11 +291,11 @@ static inline pte_t kvmppc_read_update_linux_pte(pte_t *ptep, int writing,
pte_t old_pte, new_pte = __pte(0);
while (1) {
- old_pte = pte_val(*ptep);
+ old_pte = *ptep;
/*
* wait until _PAGE_BUSY is clear then set it atomically
*/
- if (unlikely(old_pte & _PAGE_BUSY)) {
+ if (unlikely(pte_val(old_pte) & _PAGE_BUSY)) {
cpu_relax();
continue;
}
@@ -306,16 +306,18 @@ static inline pte_t kvmppc_read_update_linux_pte(pte_t *ptep, int writing,
return __pte(0);
#endif
/* If pte is not present return None */
- if (unlikely(!(old_pte & _PAGE_PRESENT)))
+ if (unlikely(!(pte_val(old_pte) & _PAGE_PRESENT)))
return __pte(0);
new_pte = pte_mkyoung(old_pte);
if (writing && pte_write(old_pte))
new_pte = pte_mkdirty(new_pte);
- if (old_pte == __cmpxchg_u64((unsigned long *)ptep, old_pte,
- new_pte))
+ if (pte_val(old_pte) == __cmpxchg_u64((unsigned long *)ptep,
+ pte_val(old_pte),
+ pte_val(new_pte))) {
break;
+ }
}
return new_pte;
}
diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/page.h
index 26fe1ae..cc62ab9 100644
--- a/arch/powerpc/include/asm/page.h
+++ b/arch/powerpc/include/asm/page.h
@@ -278,7 +278,7 @@ extern long long virt_phys_offset;
#ifndef __ASSEMBLY__
-#undef STRICT_MM_TYPECHECKS
+#define STRICT_MM_TYPECHECKS 1
#ifdef STRICT_MM_TYPECHECKS
/* These are used to make use of C type-checking. */
diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h
index 316f9a5..3e29088 100644
--- a/arch/powerpc/include/asm/pgtable.h
+++ b/arch/powerpc/include/asm/pgtable.h
@@ -77,8 +77,8 @@ static inline void pmdp_set_numa(struct mm_struct *mm, unsigned long addr,
* which was inherited from x86. For the purposes of powerpc pte_basic_t and
* pmd_t are equivalent
*/
-#define pteval_t pte_basic_t
-#define pmdval_t pmd_t
+typedef unsigned long pteval_t;
+typedef unsigned long pmdval_t;
static inline pteval_t ptenuma_flags(pte_t pte)
{
return pte_val(pte) & _PAGE_NUMA_MASK;
diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
index c8d709a..5162936 100644
--- a/arch/powerpc/mm/pgtable_64.c
+++ b/arch/powerpc/mm/pgtable_64.c
@@ -714,7 +714,7 @@ void set_pmd_at(struct mm_struct *mm, unsigned long addr,
assert_spin_locked(&mm->page_table_lock);
WARN_ON(!pmd_trans_huge(pmd));
#endif
- trace_hugepage_set_pmd(addr, pmd);
+ trace_hugepage_set_pmd(addr, pmd_val(pmd));
return set_pte_at(mm, addr, pmdp_ptep(pmdp), pmd_pte(pmd));
}
diff --git a/arch/powerpc/mm/tlb_hash64.c b/arch/powerpc/mm/tlb_hash64.c
index d2a94b8..c522969 100644
--- a/arch/powerpc/mm/tlb_hash64.c
+++ b/arch/powerpc/mm/tlb_hash64.c
@@ -216,7 +216,7 @@ void __flush_hash_table_range(struct mm_struct *mm, unsigned long start,
continue;
pte = pte_val(*ptep);
if (hugepage_shift)
- trace_hugepage_invalidate(start, pte_val(pte));
+ trace_hugepage_invalidate(start, pte);
if (!(pte & _PAGE_HASHPTE))
continue;
if (unlikely(hugepage_shift && pmd_trans_huge(*(pmd_t *)pte)))
--
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