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From: peterx@redhat.com
To: linux-mm@kvack.org,
	linux-kernel@vger.kernel.org
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>,
	x86@kernel.org,
	"Kirill A . Shutemov" <kirill@shutemov.name>,
	Jason Gunthorpe <jgg@nvidia.com>,
	Yang Shi <shy828301@gmail.com>,
	peterx@redhat.com,
	Andrew Morton <akpm@linux-foundation.org>,
	linuxppc-dev@lists.ozlabs.org,
	Muchun Song <muchun.song@linux.dev>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Nicholas Piggin <npiggin@gmail.com>,
	"Aneesh Kumar K.V" <aneesh.kumar@kernel.org>,
	"Naveen N. Rao" <naveen.n.rao@linux.ibm.com>
Subject: [PATCH v3 01/10] mm/ppc: Define pXd_large() with pXd_leaf()
Date: Tue,  5 Mar 2024 12:37:41 +0800
Message-ID: <20240305043750.93762-2-peterx@redhat.com>
In-Reply-To: <20240305043750.93762-1-peterx@redhat.com>
References: <20240305043750.93762-1-peterx@redhat.com>
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From: Peter Xu <peterx@redhat.com>

The two definitions are the same.  The only difference is that pXd_large()
is only defined with THP selected, and only on book3s 64bits.

Instead of implementing it twice, make pXd_large() a macro to pXd_leaf().
Define it unconditionally just like pXd_leaf().  This helps to prepare
merging the two APIs.

Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@kernel.org>
Cc: "Naveen N. Rao" <naveen.n.rao@linux.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
---
 arch/powerpc/include/asm/book3s/64/pgtable.h | 16 ++--------------
 arch/powerpc/include/asm/pgtable.h           |  2 +-
 2 files changed, 3 insertions(+), 15 deletions(-)

diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index 927d585652bc..d1318e8582ac 100644
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -1157,20 +1157,6 @@ pud_hugepage_update(struct mm_struct *mm, unsigned long addr, pud_t *pudp,
 	return pud_val(*pudp);
 }
 
-/*
- * returns true for pmd migration entries, THP, devmap, hugetlb
- * But compile time dependent on THP config
- */
-static inline int pmd_large(pmd_t pmd)
-{
-	return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
-}
-
-static inline int pud_large(pud_t pud)
-{
-	return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
-}
-
 /*
  * For radix we should always find H_PAGE_HASHPTE zero. Hence
  * the below will work for radix too
@@ -1455,6 +1441,7 @@ static inline bool is_pte_rw_upgrade(unsigned long old_val, unsigned long new_va
  */
 #define pmd_is_leaf pmd_is_leaf
 #define pmd_leaf pmd_is_leaf
+#define pmd_large pmd_leaf
 static inline bool pmd_is_leaf(pmd_t pmd)
 {
 	return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
@@ -1462,6 +1449,7 @@ static inline bool pmd_is_leaf(pmd_t pmd)
 
 #define pud_is_leaf pud_is_leaf
 #define pud_leaf pud_is_leaf
+#define pud_large pud_leaf
 static inline bool pud_is_leaf(pud_t pud)
 {
 	return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h
index 7a1ba8889aea..5928b3c1458d 100644
--- a/arch/powerpc/include/asm/pgtable.h
+++ b/arch/powerpc/include/asm/pgtable.h
@@ -101,7 +101,7 @@ void poking_init(void);
 extern unsigned long ioremap_bot;
 extern const pgprot_t protection_map[16];
 
-#ifndef CONFIG_TRANSPARENT_HUGEPAGE
+#ifndef pmd_large
 #define pmd_large(pmd)		0
 #endif
 
-- 
2.44.0