linux-kernel - [PATCH v2 10/15] loongarch: drop definition of PMD

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Date:   Tue,  5 Jul 2022 18:47:03 +0300
From:   Mike Rapoport <rppt@...nel.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Arnd Bergmann <arnd@...db.de>, Dinh Nguyen <dinguyen@...nel.org>,
        Guo Ren <guoren@...nel.org>, Helge Deller <deller@....de>,
        Huacai Chen <chenhuacai@...nel.org>,
        "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
        Matthew Wilcox <willy@...radead.org>,
        Max Filippov <jcmvbkbc@...il.com>,
        Mike Rapoport <rppt@...nel.org>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        "Russell King (Oracle)" <linux@...linux.org.uk>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        WANG Xuerui <kernel@...0n.name>, linux-arch@...r.kernel.org,
        linux-csky@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mips@...r.kernel.org, linux-mm@...ck.org,
        linux-parisc@...r.kernel.org, linux-xtensa@...ux-xtensa.org,
        loongarch@...ts.linux.dev
Subject: [PATCH v2 10/15] loongarch: drop definition of PMD_ORDER

From: Mike Rapoport <rppt@...ux.ibm.com>

This is the order of the page table allocation, not the order of a PMD.
Since its always hardwired to 0, simply drop it.

Signed-off-by: Mike Rapoport <rppt@...ux.ibm.com>
Acked-by: Huacai Chen <chenhuacai@...nel.org>
---
 arch/loongarch/include/asm/pgalloc.h | 4 ++--
 arch/loongarch/include/asm/pgtable.h | 7 +++----
 arch/loongarch/kernel/asm-offsets.c  | 3 ---
 3 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/arch/loongarch/include/asm/pgalloc.h b/arch/loongarch/include/asm/pgalloc.h
index b0a57b25c131..93e785f46639 100644
--- a/arch/loongarch/include/asm/pgalloc.h
+++ b/arch/loongarch/include/asm/pgalloc.h
@@ -66,12 +66,12 @@ static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
 	pmd_t *pmd;
 	struct page *pg;
 
-	pg = alloc_pages(GFP_KERNEL_ACCOUNT, PMD_ORDER);
+	pg = alloc_page(GFP_KERNEL_ACCOUNT);
 	if (!pg)
 		return NULL;
 
 	if (!pgtable_pmd_page_ctor(pg)) {
-		__free_pages(pg, PMD_ORDER);
+		__free_page(pg);
 		return NULL;
 	}
 
diff --git a/arch/loongarch/include/asm/pgtable.h b/arch/loongarch/include/asm/pgtable.h
index e0bbfc31fe72..f926537d2233 100644
--- a/arch/loongarch/include/asm/pgtable.h
+++ b/arch/loongarch/include/asm/pgtable.h
@@ -23,7 +23,6 @@
 
 #define PGD_ORDER		0
 #define PUD_ORDER		0
-#define PMD_ORDER		0
 
 #if CONFIG_PGTABLE_LEVELS == 2
 #define PGDIR_SHIFT	(PAGE_SHIFT + (PAGE_SHIFT - 3))
@@ -31,12 +30,12 @@
 #define PMD_SHIFT	(PAGE_SHIFT + (PAGE_SHIFT - 3))
 #define PMD_SIZE	(1UL << PMD_SHIFT)
 #define PMD_MASK	(~(PMD_SIZE-1))
-#define PGDIR_SHIFT	(PMD_SHIFT + (PAGE_SHIFT + PMD_ORDER - 3))
+#define PGDIR_SHIFT	(PMD_SHIFT + (PAGE_SHIFT - 3))
 #elif CONFIG_PGTABLE_LEVELS == 4
 #define PMD_SHIFT	(PAGE_SHIFT + (PAGE_SHIFT - 3))
 #define PMD_SIZE	(1UL << PMD_SHIFT)
 #define PMD_MASK	(~(PMD_SIZE-1))
-#define PUD_SHIFT	(PMD_SHIFT + (PAGE_SHIFT + PMD_ORDER - 3))
+#define PUD_SHIFT	(PMD_SHIFT + (PAGE_SHIFT - 3))
 #define PUD_SIZE	(1UL << PUD_SHIFT)
 #define PUD_MASK	(~(PUD_SIZE-1))
 #define PGDIR_SHIFT	(PUD_SHIFT + (PAGE_SHIFT + PUD_ORDER - 3))
@@ -52,7 +51,7 @@
 #define PTRS_PER_PUD	((PAGE_SIZE << PUD_ORDER) >> 3)
 #endif
 #if CONFIG_PGTABLE_LEVELS > 2
-#define PTRS_PER_PMD	((PAGE_SIZE << PMD_ORDER) >> 3)
+#define PTRS_PER_PMD	(PAGE_SIZE >> 3)
 #endif
 #define PTRS_PER_PTE	(PAGE_SIZE >> 3)
 
diff --git a/arch/loongarch/kernel/asm-offsets.c b/arch/loongarch/kernel/asm-offsets.c
index 1a1166a7e61c..aa4ef42d759f 100644
--- a/arch/loongarch/kernel/asm-offsets.c
+++ b/arch/loongarch/kernel/asm-offsets.c
@@ -191,9 +191,6 @@ void output_mm_defines(void)
 	DEFINE(_PTE_T_LOG2, PTE_T_LOG2);
 	BLANK();
 	DEFINE(_PGD_ORDER, PGD_ORDER);
-#ifndef __PAGETABLE_PMD_FOLDED
-	DEFINE(_PMD_ORDER, PMD_ORDER);
-#endif
 	BLANK();
 	DEFINE(_PMD_SHIFT, PMD_SHIFT);
 	DEFINE(_PGDIR_SHIFT, PGDIR_SHIFT);
-- 
2.34.1