AcoSail/kernel_optimize_test
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x86/pvops: remove pte_flags pvop

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pte_flags() was introduced as a new pvop in order to extract just the
flags portion of a pte, which is a potentially cheaper operation than
extracting the page number as well.  It turns out this operation is
not needed, because simply using a mask to extract the flags from a
pte is sufficient for all current users.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jeremy Fitzhardinge 2009-01-22 14:24:16 -08:00 committed by Ingo Molnar
parent f3b8436ad9
commit ab897d2013
4 changed files with 1 additions and 22 deletions
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3
arch/x86/include/asm/page.h
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@ -147,7 +147,7 @@ static inline pteval_t native_pte_val(pte_t pte)
return pte.pte;
}
static inline pteval_t native_pte_flags(pte_t pte)
static inline pteval_t pte_flags(pte_t pte)
{
return native_pte_val(pte) & PTE_FLAGS_MASK;
}
@ -173,7 +173,6 @@ static inline pteval_t native_pte_flags(pte_t pte)
#endif
#define pte_val(x) native_pte_val(x)
#define pte_flags(x) native_pte_flags(x)
#define __pte(x) native_make_pte(x)
#endif /* CONFIG_PARAVIRT */

18
arch/x86/include/asm/paravirt.h
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@ -279,7 +279,6 @@ struct pv_mmu_ops {
pte_t *ptep, pte_t pte);
pteval_t (*pte_val)(pte_t);
pteval_t (*pte_flags)(pte_t);
pte_t (*make_pte)(pteval_t pte);
pgdval_t (*pgd_val)(pgd_t);
@ -1084,23 +1083,6 @@ static inline pteval_t pte_val(pte_t pte)
return ret;
}
static inline pteval_t pte_flags(pte_t pte)
{
pteval_t ret;
if (sizeof(pteval_t) > sizeof(long))
ret = PVOP_CALL2(pteval_t, pv_mmu_ops.pte_flags,
pte.pte, (u64)pte.pte >> 32);
else
ret = PVOP_CALL1(pteval_t, pv_mmu_ops.pte_flags,
pte.pte);
#ifdef CONFIG_PARAVIRT_DEBUG
BUG_ON(ret & PTE_PFN_MASK);
#endif
return ret;
}
static inline pgd_t __pgd(pgdval_t val)
{
pgdval_t ret;

1
arch/x86/kernel/paravirt.c
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@ -435,7 +435,6 @@ struct pv_mmu_ops pv_mmu_ops = {
#endif /* PAGETABLE_LEVELS >= 3 */
.pte_val = native_pte_val,
.pte_flags = native_pte_flags,
.pgd_val = native_pgd_val,
.make_pte = native_make_pte,

1
arch/x86/xen/enlighten.c
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@ -1314,7 +1314,6 @@ static const struct pv_mmu_ops xen_mmu_ops __initdata = {
.ptep_modify_prot_commit = __ptep_modify_prot_commit,
.pte_val = xen_pte_val,
.pte_flags = native_pte_flags,
.pgd_val = xen_pgd_val,
.make_pte = xen_make_pte,