From: Peter Xu <peterx@xxxxxxxxxx>
These macros can be helpful when we plan to merge hugetlb code into generic
code. Move them out and define them even if !THP.
We actually already defined HPAGE_PMD_NR for other reasons even if !THP.
Reorganize these macros.
Reviewed-by: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
---
include/linux/huge_mm.h | 17 ++++++-----------
1 file changed, 6 insertions(+), 11 deletions(-)
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
index de0c89105076..3bcdfc7e5d57 100644
--- a/include/linux/huge_mm.h
+++ b/include/linux/huge_mm.h
@@ -64,9 +64,6 @@ ssize_t single_hugepage_flag_show(struct kobject *kobj,
enum transparent_hugepage_flag flag);
extern struct kobj_attribute shmem_enabled_attr;
-#define HPAGE_PMD_ORDER (HPAGE_PMD_SHIFT-PAGE_SHIFT)
-#define HPAGE_PMD_NR (1<<HPAGE_PMD_ORDER)
-
/*
* Mask of all large folio orders supported for anonymous THP; all orders up to
* and including PMD_ORDER, except order-0 (which is not "huge") and order-1
@@ -87,14 +84,19 @@ extern struct kobj_attribute shmem_enabled_attr;
#define thp_vma_allowable_order(vma, vm_flags, smaps, in_pf, enforce_sysfs, order) \
(!!thp_vma_allowable_orders(vma, vm_flags, smaps, in_pf, enforce_sysfs, BIT(order)))
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
#define HPAGE_PMD_SHIFT PMD_SHIFT
#define HPAGE_PMD_SIZE ((1UL) << HPAGE_PMD_SHIFT)
#define HPAGE_PMD_MASK (~(HPAGE_PMD_SIZE - 1))
+#define HPAGE_PMD_ORDER (HPAGE_PMD_SHIFT-PAGE_SHIFT)
+#define HPAGE_PMD_NR (1<<HPAGE_PMD_ORDER)
#define HPAGE_PUD_SHIFT PUD_SHIFT
#define HPAGE_PUD_SIZE ((1UL) << HPAGE_PUD_SHIFT)
#define HPAGE_PUD_MASK (~(HPAGE_PUD_SIZE - 1))
+#define HPAGE_PUD_ORDER (HPAGE_PUD_SHIFT-PAGE_SHIFT)
+#define HPAGE_PUD_NR (1<<HPAGE_PUD_ORDER)
+
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
extern unsigned long transparent_hugepage_flags;
extern unsigned long huge_anon_orders_always;
@@ -378,13 +380,6 @@ static inline bool thp_migration_supported(void)
}
#else /* CONFIG_TRANSPARENT_HUGEPAGE */
-#define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; })
-#define HPAGE_PMD_MASK ({ BUILD_BUG(); 0; })
-#define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; })
-
-#define HPAGE_PUD_SHIFT ({ BUILD_BUG(); 0; })
-#define HPAGE_PUD_MASK ({ BUILD_BUG(); 0; })
-#define HPAGE_PUD_SIZE ({ BUILD_BUG(); 0; })
static inline bool folio_test_pmd_mappable(struct folio *folio)
{
--
2.44.0
