On 9/2/20 6:10 PM, Christophe Leroy wrote:
Le 02/09/2020 à 13:42, Aneesh Kumar K.V a écrit :
ppc64 supports huge vmap only with radix translation. Hence use arch
helper
to determine the huge vmap support.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
---
mm/debug_vm_pgtable.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c
index 00649b47f6e0..4c73e63b4ceb 100644
--- a/mm/debug_vm_pgtable.c
+++ b/mm/debug_vm_pgtable.c
@@ -28,6 +28,7 @@
#include <linux/swapops.h>
#include <linux/start_kernel.h>
#include <linux/sched/mm.h>
+#include <linux/io.h>
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
@@ -206,11 +207,12 @@ static void __init pmd_leaf_tests(unsigned long
pfn, pgprot_t prot)
WARN_ON(!pmd_leaf(pmd));
}
+#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
static void __init pmd_huge_tests(pmd_t *pmdp, unsigned long pfn,
pgprot_t prot)
{
pmd_t pmd;
- if (!IS_ENABLED(CONFIG_HAVE_ARCH_HUGE_VMAP))
+ if (!arch_ioremap_pmd_supported())
What about moving ioremap_pmd_enabled() from mm/ioremap.c to some .h,
and using it ?
As ioremap_pmd_enabled() is defined at all time, no need of #ifdef
yes. This was discussed earlier too. IMHO we should do that outside this
series. I guess figuring out ioremap_pmd/pud support can definitely be
simplified. With a generic version like
#ifndef arch_ioremap_pmd_supported
static inline bool arch_ioremap_pmd_supported(void)
{
return false;
}
#endif
return;
pr_debug("Validating PMD huge\n");
@@ -224,6 +226,9 @@ static void __init pmd_huge_tests(pmd_t *pmdp,
unsigned long pfn, pgprot_t prot)
pmd = READ_ONCE(*pmdp);
WARN_ON(!pmd_none(pmd));
}
+#else /* CONFIG_HAVE_ARCH_HUGE_VMAP */
+static void __init pmd_huge_tests(pmd_t *pmdp, unsigned long pfn,
pgprot_t prot) { }
+#endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */
static void __init pmd_savedwrite_tests(unsigned long pfn, pgprot_t
prot)
{
@@ -320,11 +325,12 @@ static void __init pud_leaf_tests(unsigned long
pfn, pgprot_t prot)
WARN_ON(!pud_leaf(pud));
}
+#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
static void __init pud_huge_tests(pud_t *pudp, unsigned long pfn,
pgprot_t prot)
{
pud_t pud;
- if (!IS_ENABLED(CONFIG_HAVE_ARCH_HUGE_VMAP))
+ if (!arch_ioremap_pud_supported())
What about moving ioremap_pud_enabled() from mm/ioremap.c to some .h,
and using it ?
As ioremap_pud_enabled() is defined at all time, no need of #ifdef
return;
pr_debug("Validating PUD huge\n");
@@ -338,6 +344,10 @@ static void __init pud_huge_tests(pud_t *pudp,
unsigned long pfn, pgprot_t prot)
pud = READ_ONCE(*pudp);
WARN_ON(!pud_none(pud));
}
+#else /* !CONFIG_HAVE_ARCH_HUGE_VMAP */
+static void __init pud_huge_tests(pud_t *pudp, unsigned long pfn,
pgprot_t prot) { }
+#endif /* !CONFIG_HAVE_ARCH_HUGE_VMAP */
+
#else /* !CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
static void __init pud_basic_tests(unsigned long pfn, pgprot_t prot)
{ }
static void __init pud_advanced_tests(struct mm_struct *mm,
Christophe
