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From: Gavin Shan <gshan@redhat.com>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, mark.rutland@arm.com,
	will@kernel.org, catalin.marinas@arm.com, shan.gavin@gmail.com
Subject: [PATCH] arm64/mm: Remove add_huge_page_size()
Date: Wed,  6 May 2020 16:46:35 +1000	[thread overview]
Message-ID: <20200506064635.20114-1-gshan@redhat.com> (raw)

The function add_huge_page_size(), wrapper of hugetlb_add_hstate(),
avoids to register duplicated huge page states for same size. However,
the same logic has been included in hugetlb_add_hstate(). So it seems
unnecessary to keep add_huge_page_size() and this just removes it.

Signed-off-by: Gavin Shan <gshan@redhat.com>
---
 arch/arm64/mm/hugetlbpage.c | 18 +++++-------------
 1 file changed, 5 insertions(+), 13 deletions(-)

diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c
index bbeb6a5a6ba6..ed7530413941 100644
--- a/arch/arm64/mm/hugetlbpage.c
+++ b/arch/arm64/mm/hugetlbpage.c
@@ -441,22 +441,14 @@ void huge_ptep_clear_flush(struct vm_area_struct *vma,
 	clear_flush(vma->vm_mm, addr, ptep, pgsize, ncontig);
 }
 
-static void __init add_huge_page_size(unsigned long size)
-{
-	if (size_to_hstate(size))
-		return;
-
-	hugetlb_add_hstate(ilog2(size) - PAGE_SHIFT);
-}
-
 static int __init hugetlbpage_init(void)
 {
 #ifdef CONFIG_ARM64_4K_PAGES
-	add_huge_page_size(PUD_SIZE);
+	hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
 #endif
-	add_huge_page_size(CONT_PMD_SIZE);
-	add_huge_page_size(PMD_SIZE);
-	add_huge_page_size(CONT_PTE_SIZE);
+	hugetlb_add_hstate(CONT_PMD_SHIFT + PMD_SHIFT - PAGE_SHIFT);
+	hugetlb_add_hstate(PMD_SHIFT - PAGE_SHIFT);
+	hugetlb_add_hstate(CONT_PTE_SHIFT);
 
 	return 0;
 }
@@ -473,7 +465,7 @@ static __init int setup_hugepagesz(char *opt)
 	case CONT_PMD_SIZE:
 	case PMD_SIZE:
 	case CONT_PTE_SIZE:
-		add_huge_page_size(ps);
+		hugetlb_add_hstate(ilog2(ps) - PAGE_SHIFT);
 		return 1;
 	}
 
-- 
2.23.0


WARNING: multiple messages have this Message-ID (diff)
From: Gavin Shan <gshan@redhat.com>
To: linux-arm-kernel@lists.infradead.org
Cc: mark.rutland@arm.com, catalin.marinas@arm.com, will@kernel.org,
	linux-kernel@vger.kernel.org, shan.gavin@gmail.com
Subject: [PATCH] arm64/mm: Remove add_huge_page_size()
Date: Wed,  6 May 2020 16:46:35 +1000	[thread overview]
Message-ID: <20200506064635.20114-1-gshan@redhat.com> (raw)

The function add_huge_page_size(), wrapper of hugetlb_add_hstate(),
avoids to register duplicated huge page states for same size. However,
the same logic has been included in hugetlb_add_hstate(). So it seems
unnecessary to keep add_huge_page_size() and this just removes it.

Signed-off-by: Gavin Shan <gshan@redhat.com>
---
 arch/arm64/mm/hugetlbpage.c | 18 +++++-------------
 1 file changed, 5 insertions(+), 13 deletions(-)

diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c
index bbeb6a5a6ba6..ed7530413941 100644
--- a/arch/arm64/mm/hugetlbpage.c
+++ b/arch/arm64/mm/hugetlbpage.c
@@ -441,22 +441,14 @@ void huge_ptep_clear_flush(struct vm_area_struct *vma,
 	clear_flush(vma->vm_mm, addr, ptep, pgsize, ncontig);
 }
 
-static void __init add_huge_page_size(unsigned long size)
-{
-	if (size_to_hstate(size))
-		return;
-
-	hugetlb_add_hstate(ilog2(size) - PAGE_SHIFT);
-}
-
 static int __init hugetlbpage_init(void)
 {
 #ifdef CONFIG_ARM64_4K_PAGES
-	add_huge_page_size(PUD_SIZE);
+	hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
 #endif
-	add_huge_page_size(CONT_PMD_SIZE);
-	add_huge_page_size(PMD_SIZE);
-	add_huge_page_size(CONT_PTE_SIZE);
+	hugetlb_add_hstate(CONT_PMD_SHIFT + PMD_SHIFT - PAGE_SHIFT);
+	hugetlb_add_hstate(PMD_SHIFT - PAGE_SHIFT);
+	hugetlb_add_hstate(CONT_PTE_SHIFT);
 
 	return 0;
 }
@@ -473,7 +465,7 @@ static __init int setup_hugepagesz(char *opt)
 	case CONT_PMD_SIZE:
 	case PMD_SIZE:
 	case CONT_PTE_SIZE:
-		add_huge_page_size(ps);
+		hugetlb_add_hstate(ilog2(ps) - PAGE_SHIFT);
 		return 1;
 	}
 
-- 
2.23.0


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             reply	other threads:[~2020-05-06  6:46 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-06  6:46 Gavin Shan [this message]
2020-05-06  6:46 ` [PATCH] arm64/mm: Remove add_huge_page_size() Gavin Shan
2020-05-06  7:06 ` Anshuman Khandual
2020-05-06  7:06   ` Anshuman Khandual
2020-05-06  7:19   ` Will Deacon
2020-05-06  7:19     ` Will Deacon
2020-05-07  0:15     ` Gavin Shan
2020-05-07  0:15       ` Gavin Shan
2020-05-07  8:37       ` Will Deacon
2020-05-07  8:37         ` Will Deacon

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