[PATCH v5 12/14] treewide: introduce arch_has_pmd_leaves()
From: Luiz Capitulino
Date: Fri May 29 2026 - 11:15:00 EST
Now that all the has_transparent_hugepage() callers have been converted
to pgtable_has_pmd_leaves(), this commit does two things:
1. Rename has_transparent_hugepage() arch implementations to
arch_has_pmd_leaves(), since that's what the helper checks for
2. Introduce the default implementation of arch_has_pmd_leaves() as
IS_ENABLED(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE). This means that if
the arch doesn't implement arch_has_pmd_leaves() we default to checking
CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE as a way to determine if
PMD-sized pages are supported
Note that arch_has_pmd_leaves() is supposed to be called only by
init_arch_has_pmd_leaves(). The remaining exception is hugepage_init()
which will be converted in a future commit.
Signed-off-by: Luiz Capitulino <luizcap@xxxxxxxxxx>
---
arch/mips/include/asm/pgtable.h | 4 ++--
arch/mips/mm/tlb-r4k.c | 4 ++--
arch/powerpc/include/asm/book3s/64/hash-4k.h | 2 +-
arch/powerpc/include/asm/book3s/64/hash-64k.h | 2 +-
arch/powerpc/include/asm/book3s/64/pgtable.h | 10 +++++-----
arch/powerpc/include/asm/book3s/64/radix.h | 2 +-
arch/powerpc/mm/book3s64/hash_pgtable.c | 4 ++--
arch/s390/include/asm/pgtable.h | 4 ++--
arch/x86/include/asm/pgtable.h | 4 ++--
include/linux/pgtable.h | 4 ++--
mm/huge_memory.c | 2 +-
mm/memory.c | 2 +-
12 files changed, 22 insertions(+), 22 deletions(-)
diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h
index b038da872ec6..2a0a7ddf8bee 100644
--- a/arch/mips/include/asm/pgtable.h
+++ b/arch/mips/include/asm/pgtable.h
@@ -740,8 +740,8 @@ static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
-#define has_transparent_hugepage has_transparent_hugepage
-extern int has_transparent_hugepage(void);
+#define arch_has_pmd_leaves arch_has_pmd_leaves
+extern int arch_has_pmd_leaves(void);
#ifdef _PAGE_HUGE
#define pmd_leaf(pmd) ((pmd_val(pmd) & _PAGE_HUGE) != 0)
diff --git a/arch/mips/mm/tlb-r4k.c b/arch/mips/mm/tlb-r4k.c
index f4e369342a56..9339ebb0815f 100644
--- a/arch/mips/mm/tlb-r4k.c
+++ b/arch/mips/mm/tlb-r4k.c
@@ -432,7 +432,7 @@ void add_wired_entry(unsigned long entrylo0, unsigned long entrylo1,
#endif
}
-int has_transparent_hugepage(void)
+int arch_has_pmd_leaves(void)
{
static unsigned int mask = -1;
@@ -448,7 +448,7 @@ int has_transparent_hugepage(void)
}
return mask == PM_HUGE_MASK;
}
-EXPORT_SYMBOL(has_transparent_hugepage);
+EXPORT_SYMBOL(arch_has_pmd_leaves);
/*
* Used for loading TLB entries before trap_init() has started, when we
diff --git a/arch/powerpc/include/asm/book3s/64/hash-4k.h b/arch/powerpc/include/asm/book3s/64/hash-4k.h
index 79511e6abfca..d532e3f0dfc3 100644
--- a/arch/powerpc/include/asm/book3s/64/hash-4k.h
+++ b/arch/powerpc/include/asm/book3s/64/hash-4k.h
@@ -167,7 +167,7 @@ extern pmd_t hash__pmdp_huge_get_and_clear(struct mm_struct *mm,
unsigned long addr, pmd_t *pmdp);
#endif
-extern int hash__has_transparent_hugepage(void);
+extern int hash__arch_has_pmd_leaves(void);
#endif /* !__ASSEMBLER__ */
#endif /* _ASM_POWERPC_BOOK3S_64_HASH_4K_H */
diff --git a/arch/powerpc/include/asm/book3s/64/hash-64k.h b/arch/powerpc/include/asm/book3s/64/hash-64k.h
index a4a44a112ff9..d523c80f44f7 100644
--- a/arch/powerpc/include/asm/book3s/64/hash-64k.h
+++ b/arch/powerpc/include/asm/book3s/64/hash-64k.h
@@ -280,7 +280,7 @@ extern pmd_t hash__pmdp_huge_get_and_clear(struct mm_struct *mm,
unsigned long addr, pmd_t *pmdp);
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
-extern int hash__has_transparent_hugepage(void);
+extern int hash__arch_has_pmd_leaves(void);
#endif /* __ASSEMBLER__ */
#endif /* _ASM_POWERPC_BOOK3S_64_HASH_64K_H */
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index 49c8beef96bb..a5005d1d2a7d 100644
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -1432,14 +1432,14 @@ static inline bool arch_needs_pgtable_deposit(void)
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
-extern int hash__has_transparent_hugepage(void);
-static inline int has_transparent_hugepage(void)
+extern int hash__arch_has_pmd_leaves(void);
+static inline int arch_has_pmd_leaves(void)
{
if (radix_enabled())
- return radix__has_transparent_hugepage();
- return hash__has_transparent_hugepage();
+ return radix__arch_has_pmd_leaves();
+ return hash__arch_has_pmd_leaves();
}
-#define has_transparent_hugepage has_transparent_hugepage
+#define arch_has_pmd_leaves arch_has_pmd_leaves
#define __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION
pte_t ptep_modify_prot_start(struct vm_area_struct *, unsigned long, pte_t *);
diff --git a/arch/powerpc/include/asm/book3s/64/radix.h b/arch/powerpc/include/asm/book3s/64/radix.h
index 50545cf519bd..e8b74528953f 100644
--- a/arch/powerpc/include/asm/book3s/64/radix.h
+++ b/arch/powerpc/include/asm/book3s/64/radix.h
@@ -307,7 +307,7 @@ static inline int radix__has_transparent_pud_hugepage(void)
}
#endif
-static inline int radix__has_transparent_hugepage(void)
+static inline int radix__arch_has_pmd_leaves(void)
{
/* For radix 2M at PMD level means thp */
if (mmu_psize_defs[MMU_PAGE_2M].shift == PMD_SHIFT)
diff --git a/arch/powerpc/mm/book3s64/hash_pgtable.c b/arch/powerpc/mm/book3s64/hash_pgtable.c
index 50316f3fc5d3..a67bc1723404 100644
--- a/arch/powerpc/mm/book3s64/hash_pgtable.c
+++ b/arch/powerpc/mm/book3s64/hash_pgtable.c
@@ -393,7 +393,7 @@ pmd_t hash__pmdp_huge_get_and_clear(struct mm_struct *mm,
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
-int hash__has_transparent_hugepage(void)
+int hash__arch_has_pmd_leaves(void)
{
if (!mmu_has_feature(MMU_FTR_16M_PAGE))
@@ -422,7 +422,7 @@ int hash__has_transparent_hugepage(void)
return 1;
}
-EXPORT_SYMBOL_GPL(hash__has_transparent_hugepage);
+EXPORT_SYMBOL_GPL(hash__arch_has_pmd_leaves);
#ifdef CONFIG_STRICT_KERNEL_RWX
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 5ed14221cc0e..f949d6988a41 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -1800,8 +1800,8 @@ static inline int pmd_trans_huge(pmd_t pmd)
}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
-#define has_transparent_hugepage has_transparent_hugepage
-static inline int has_transparent_hugepage(void)
+#define arch_has_pmd_leaves arch_has_pmd_leaves
+static inline int arch_has_pmd_leaves(void)
{
return cpu_has_edat1() ? 1 : 0;
}
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 30fd1fa034e4..2badbe882637 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -331,8 +331,8 @@ static inline pud_t pud_mkspecial(pud_t pud)
#endif /* CONFIG_ARCH_SUPPORTS_PUD_PFNMAP */
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
-#define has_transparent_hugepage has_transparent_hugepage
-static inline int has_transparent_hugepage(void)
+#define arch_has_pmd_leaves arch_has_pmd_leaves
+static inline int arch_has_pmd_leaves(void)
{
return boot_cpu_has(X86_FEATURE_PSE);
}
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
index d7899b95d3f1..57148c50f6d9 100644
--- a/include/linux/pgtable.h
+++ b/include/linux/pgtable.h
@@ -2274,8 +2274,8 @@ static inline void __init pgtable_leaf_support_init(void) { }
#endif
#endif
-#ifndef has_transparent_hugepage
-#define has_transparent_hugepage() IS_BUILTIN(CONFIG_TRANSPARENT_HUGEPAGE)
+#ifndef arch_has_pmd_leaves
+#define arch_has_pmd_leaves() IS_BUILTIN(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE)
#endif
#ifndef has_transparent_pud_hugepage
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 970e077019b7..4da10e94bbb6 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -969,7 +969,7 @@ static int __init hugepage_init(void)
int err;
struct kobject *hugepage_kobj;
- if (!has_transparent_hugepage()) {
+ if (!arch_has_pmd_leaves()) {
transparent_hugepage_flags = 1 << TRANSPARENT_HUGEPAGE_UNSUPPORTED;
return -EINVAL;
}
diff --git a/mm/memory.c b/mm/memory.c
index 2f2bf7950daf..953d8d1ea268 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -169,7 +169,7 @@ EXPORT_SYMBOL(__arch_has_pmd_leaves_key);
void __init pgtable_leaf_support_init(void)
{
- if (!has_transparent_hugepage())
+ if (!arch_has_pmd_leaves())
static_branch_disable(&__arch_has_pmd_leaves_key);
}
--
2.54.0