patches/old/mm-pgtable-remove-unneeded-pgd_devmap.patch

From: Baoquan He <bhe@redhat.com>
Subject: mm/pgtable: remove unneeded pgd_devmap()
Date: Mon, 31 Mar 2025 16:13:27 +0800

There's no user of pgd_devmap() now, remove it from all ARCH-es
and linux/pgtable.h.

Link: https://lkml.kernel.org/r/20250331081327.256412-8-bhe@redhat.com
Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: <x86@kernel.org>
Cc: Yanjun.Zhu <yanjun.zhu@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/arm64/include/asm/pgtable.h             |    5 -----
 arch/loongarch/include/asm/pgtable.h         |    1 -
 arch/powerpc/include/asm/book3s/64/pgtable.h |    5 -----
 arch/riscv/include/asm/pgtable-64.h          |    5 -----
 arch/x86/include/asm/pgtable.h               |    5 -----
 include/linux/pgtable.h                      |    4 ----
 6 files changed, 25 deletions(-)

--- a/arch/arm64/include/asm/pgtable.h~mm-pgtable-remove-unneeded-pgd_devmap
+++ a/arch/arm64/include/asm/pgtable.h
@@ -1230,11 +1230,6 @@ static inline int pud_devmap(pud_t pud)
 {
 	return 0;
 }
-
-static inline int pgd_devmap(pgd_t pgd)
-{
-	return 0;
-}
 #endif
 
 #ifdef CONFIG_PAGE_TABLE_CHECK
--- a/arch/loongarch/include/asm/pgtable.h~mm-pgtable-remove-unneeded-pgd_devmap
+++ a/arch/loongarch/include/asm/pgtable.h
@@ -615,7 +615,6 @@ static inline long pmd_protnone(pmd_t pm
 
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 #define pud_devmap(pud)		(0)
-#define pgd_devmap(pgd)		(0)
 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
 
 /*
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h~mm-pgtable-remove-unneeded-pgd_devmap
+++ a/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -1405,11 +1405,6 @@ static inline int pud_devmap(pud_t pud)
 {
 	return pte_devmap(pud_pte(pud));
 }
-
-static inline int pgd_devmap(pgd_t pgd)
-{
-	return 0;
-}
 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
 
 #define __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION
--- a/arch/riscv/include/asm/pgtable-64.h~mm-pgtable-remove-unneeded-pgd_devmap
+++ a/arch/riscv/include/asm/pgtable-64.h
@@ -411,11 +411,6 @@ static inline int pud_devmap(pud_t pud)
 {
 	return 0;
 }
-
-static inline int pgd_devmap(pgd_t pgd)
-{
-	return 0;
-}
 #endif
 
 #endif /* _ASM_RISCV_PGTABLE_64_H */
--- a/arch/x86/include/asm/pgtable.h~mm-pgtable-remove-unneeded-pgd_devmap
+++ a/arch/x86/include/asm/pgtable.h
@@ -361,11 +361,6 @@ static inline pud_t pud_mkspecial(pud_t
 	return pud_set_flags(pud, _PAGE_SPECIAL);
 }
 #endif	/* CONFIG_ARCH_SUPPORTS_PUD_PFNMAP */
-
-static inline int pgd_devmap(pgd_t pgd)
-{
-	return 0;
-}
 #endif
 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
 
--- a/include/linux/pgtable.h~mm-pgtable-remove-unneeded-pgd_devmap
+++ a/include/linux/pgtable.h
@@ -1633,10 +1633,6 @@ static inline int pud_devmap(pud_t pud)
 {
 	return 0;
 }
-static inline int pgd_devmap(pgd_t pgd)
-{
-	return 0;
-}
 #endif
 
 #if !defined(CONFIG_TRANSPARENT_HUGEPAGE) || \
_