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Date: Wed, 6 Feb 2019 14:53:10 +0900
From: Masahiro Yamada <yamada.masahiro@...ionext.com>
To: Paolo Bonzini <pbonzini@...hat.com>,
Radim Krm
<rkrcmar@...hat.com>, kvm@...r.kernel.org
Cc: Christoph Hellwig <hch@....de>, Joerg Roedel <joro@...tes.org>,
Christoffer Dall <christoffer.dall@....com>,
Marc Zyngier <marc.zyngier@....com>,
James Hogan <jhogan@...nel.org>, linux-mips@...r.kernel.org,
Paul Mackerras <paulus@...abs.org>, kvm-ppc@...r.kernel.org,
Christian Borntraeger <borntraeger@...ibm.com>,
Janosch Frank <frankja@...ux.ibm.com>,
David Hildenbrand <david@...hat.com>,
Cornelia Huck <cohuck@...hat.com>,
linux-kernel@...r.kernel.org,
linux-arch <linux-arch@...r.kernel.org>,
Sam Ravnborg <sam@...nborg.org>,
Masahiro Yamada <yamada.masahiro@...ionext.com>
Subject: [PATCH] KVM: export <linux/kvm_para.h> and <asm/kvm_para.h> iif KVM is supported
I do not see any consistency about headers_install of <linux/kvm_para.h>
and <asm/kvm_para.h>.
According to my analysis of Linux 5.0-rc5, there are 3 groups:
[1] Both <linux/kvm_para.h> and <asm/kvm_para.h> are exported
alpha, arm, hexagon, mips, powerpc, s390, sparc, x86
[2] <asm/kvm_para.h> is exported, but <linux/kvm_para.h> is not
arc, arm64, c6x, h8300, ia64, m68k, microblaze, nios2, openrisc
[3] Neither <linux/kvm_para.h> nor <asm/kvm_para.h> is exported
csky, nds32, riscv
This does not match to the actual KVM support. At least, [2] is
half-baked.
Nor do arch maintainers look like they care about this. For example,
commit 0add53713b1c ("microblaze: Add missing kvm_para.h to Kbuild")
exported <asm/kvm_para.h> to user-space in order to fix an in-kernel
build error.
We have two ways to make this consistent:
[A] export both <linux/kvm_para.h> and <asm/kvm_para.h> for all
architectures, irrespective of the KVM support
[B] Match the header export of <linux/kvm_para.h> and <asm/kvm_para.h>
to the KVM support
My first attempt was [A] because the code looks better, but Paolo
showed preference in [B].
https://patchwork.kernel.org/patch/10794919/
So, this commit is the implementation of [B].
For most architectures, <asm/kvm_para.h> was moved to the kernel-space.
I changed include/uapi/linux/Kbuild so that it checks generated
asm/kvm_para.h as well as check-in ones.
After this commit, there will be two groups:
[1] Both <linux/kvm_para.h> and <asm/kvm_para.h> are exported
arm arm64 mips powerpc s390 x86
[2] Neither <linux/kvm_para.h> nor <asm/kvm_para.h> is exported
alpha arc c6x csky h8300 hexagon ia64 m68k microblaze nds32 nios2
openrisc parisc riscv sh sparc unicore32 xtensa
Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---
The alternative solution [A] is available at:
https://patchwork.kernel.org/patch/10794919/
Comparing the code diff, I personally prefer [A]...
arch/alpha/include/asm/Kbuild | 1 +
arch/alpha/include/uapi/asm/kvm_para.h | 2 --
arch/arc/include/asm/Kbuild | 1 +
arch/arc/include/uapi/asm/Kbuild | 1 -
arch/arm/include/uapi/asm/Kbuild | 1 +
arch/arm/include/uapi/asm/kvm_para.h | 2 --
arch/c6x/include/asm/Kbuild | 1 +
arch/c6x/include/uapi/asm/Kbuild | 1 -
arch/h8300/include/asm/Kbuild | 1 +
arch/h8300/include/uapi/asm/Kbuild | 1 -
arch/hexagon/include/asm/Kbuild | 1 +
arch/hexagon/include/uapi/asm/kvm_para.h | 2 --
arch/ia64/include/asm/Kbuild | 1 +
arch/ia64/include/uapi/asm/Kbuild | 1 -
arch/m68k/include/asm/Kbuild | 1 +
arch/m68k/include/uapi/asm/Kbuild | 1 -
arch/microblaze/include/asm/Kbuild | 1 +
arch/microblaze/include/uapi/asm/Kbuild | 1 -
arch/mips/include/uapi/asm/Kbuild | 1 +
arch/mips/include/uapi/asm/kvm_para.h | 5 -----
arch/nios2/include/asm/Kbuild | 1 +
arch/nios2/include/uapi/asm/Kbuild | 1 -
arch/openrisc/include/asm/Kbuild | 1 +
arch/openrisc/include/uapi/asm/Kbuild | 1 -
arch/parisc/include/asm/Kbuild | 1 +
arch/parisc/include/uapi/asm/Kbuild | 1 -
arch/s390/include/uapi/asm/Kbuild | 1 +
arch/s390/include/uapi/asm/kvm_para.h | 8 --------
arch/sh/include/asm/Kbuild | 1 +
arch/sh/include/uapi/asm/Kbuild | 1 -
arch/sparc/include/asm/Kbuild | 1 +
arch/sparc/include/uapi/asm/kvm_para.h | 2 --
arch/unicore32/include/asm/Kbuild | 1 +
arch/unicore32/include/uapi/asm/Kbuild | 1 -
arch/xtensa/include/asm/Kbuild | 1 +
arch/xtensa/include/uapi/asm/Kbuild | 1 -
include/uapi/linux/Kbuild | 2 ++
37 files changed, 20 insertions(+), 33 deletions(-)
delete mode 100644 arch/alpha/include/uapi/asm/kvm_para.h
delete mode 100644 arch/arm/include/uapi/asm/kvm_para.h
delete mode 100644 arch/hexagon/include/uapi/asm/kvm_para.h
delete mode 100644 arch/mips/include/uapi/asm/kvm_para.h
delete mode 100644 arch/s390/include/uapi/asm/kvm_para.h
delete mode 100644 arch/sparc/include/uapi/asm/kvm_para.h
diff --git a/arch/alpha/include/asm/Kbuild b/arch/alpha/include/asm/Kbuild
index dc0ab28..70b7833 100644
--- a/arch/alpha/include/asm/Kbuild
+++ b/arch/alpha/include/asm/Kbuild
@@ -6,6 +6,7 @@ generic-y += exec.h
generic-y += export.h
generic-y += fb.h
generic-y += irq_work.h
+generic-y += kvm_para.h
generic-y += mcs_spinlock.h
generic-y += mm-arch-hooks.h
generic-y += preempt.h
diff --git a/arch/alpha/include/uapi/asm/kvm_para.h b/arch/alpha/include/uapi/asm/kvm_para.h
deleted file mode 100644
index baacc49..0000000
--- a/arch/alpha/include/uapi/asm/kvm_para.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#include <asm-generic/kvm_para.h>
diff --git a/arch/arc/include/asm/Kbuild b/arch/arc/include/asm/Kbuild
index caa2702..6e165e1 100644
--- a/arch/arc/include/asm/Kbuild
+++ b/arch/arc/include/asm/Kbuild
@@ -10,6 +10,7 @@ generic-y += hardirq.h
generic-y += hw_irq.h
generic-y += irq_regs.h
generic-y += irq_work.h
+generic-y += kvm_para.h
generic-y += local.h
generic-y += local64.h
generic-y += mcs_spinlock.h
diff --git a/arch/arc/include/uapi/asm/Kbuild b/arch/arc/include/uapi/asm/Kbuild
index 0febf1a..c1b06dc 100644
--- a/arch/arc/include/uapi/asm/Kbuild
+++ b/arch/arc/include/uapi/asm/Kbuild
@@ -1,4 +1,3 @@
include include/uapi/asm-generic/Kbuild.asm
-generic-y += kvm_para.h
generic-y += ucontext.h
diff --git a/arch/arm/include/uapi/asm/Kbuild b/arch/arm/include/uapi/asm/Kbuild
index eee8f7d..482e5ec 100644
--- a/arch/arm/include/uapi/asm/Kbuild
+++ b/arch/arm/include/uapi/asm/Kbuild
@@ -4,3 +4,4 @@ include include/uapi/asm-generic/Kbuild.asm
generated-y += unistd-common.h
generated-y += unistd-oabi.h
generated-y += unistd-eabi.h
+generic-y += kvm_para.h
diff --git a/arch/arm/include/uapi/asm/kvm_para.h b/arch/arm/include/uapi/asm/kvm_para.h
deleted file mode 100644
index baacc49..0000000
--- a/arch/arm/include/uapi/asm/kvm_para.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#include <asm-generic/kvm_para.h>
diff --git a/arch/c6x/include/asm/Kbuild b/arch/c6x/include/asm/Kbuild
index 63b4a17..249c9f6 100644
--- a/arch/c6x/include/asm/Kbuild
+++ b/arch/c6x/include/asm/Kbuild
@@ -19,6 +19,7 @@ generic-y += irq_work.h
generic-y += kdebug.h
generic-y += kmap_types.h
generic-y += kprobes.h
+generic-y += kvm_para.h
generic-y += local.h
generic-y += mcs_spinlock.h
generic-y += mm-arch-hooks.h
diff --git a/arch/c6x/include/uapi/asm/Kbuild b/arch/c6x/include/uapi/asm/Kbuild
index 0febf1a..c1b06dc 100644
--- a/arch/c6x/include/uapi/asm/Kbuild
+++ b/arch/c6x/include/uapi/asm/Kbuild
@@ -1,4 +1,3 @@
include include/uapi/asm-generic/Kbuild.asm
-generic-y += kvm_para.h
generic-y += ucontext.h
diff --git a/arch/h8300/include/asm/Kbuild b/arch/h8300/include/asm/Kbuild
index 961c1dc..c86e3e7 100644
--- a/arch/h8300/include/asm/Kbuild
+++ b/arch/h8300/include/asm/Kbuild
@@ -24,6 +24,7 @@ generic-y += irq_work.h
generic-y += kdebug.h
generic-y += kmap_types.h
generic-y += kprobes.h
+generic-y += kvm_para.h
generic-y += linkage.h
generic-y += local.h
generic-y += local64.h
diff --git a/arch/h8300/include/uapi/asm/Kbuild b/arch/h8300/include/uapi/asm/Kbuild
index 0febf1a..c1b06dc 100644
--- a/arch/h8300/include/uapi/asm/Kbuild
+++ b/arch/h8300/include/uapi/asm/Kbuild
@@ -1,4 +1,3 @@
include include/uapi/asm-generic/Kbuild.asm
-generic-y += kvm_para.h
generic-y += ucontext.h
diff --git a/arch/hexagon/include/asm/Kbuild b/arch/hexagon/include/asm/Kbuild
index b25fd42..d046e8c 100644
--- a/arch/hexagon/include/asm/Kbuild
+++ b/arch/hexagon/include/asm/Kbuild
@@ -19,6 +19,7 @@ generic-y += irq_work.h
generic-y += kdebug.h
generic-y += kmap_types.h
generic-y += kprobes.h
+generic-y += kvm_para.h
generic-y += local.h
generic-y += local64.h
generic-y += mcs_spinlock.h
diff --git a/arch/hexagon/include/uapi/asm/kvm_para.h b/arch/hexagon/include/uapi/asm/kvm_para.h
deleted file mode 100644
index baacc49..0000000
--- a/arch/hexagon/include/uapi/asm/kvm_para.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#include <asm-generic/kvm_para.h>
diff --git a/arch/ia64/include/asm/Kbuild b/arch/ia64/include/asm/Kbuild
index 43e21fe..11f1916 100644
--- a/arch/ia64/include/asm/Kbuild
+++ b/arch/ia64/include/asm/Kbuild
@@ -2,6 +2,7 @@ generated-y += syscall_table.h
generic-y += compat.h
generic-y += exec.h
generic-y += irq_work.h
+generic-y += kvm_para.h
generic-y += mcs_spinlock.h
generic-y += mm-arch-hooks.h
generic-y += preempt.h
diff --git a/arch/ia64/include/uapi/asm/Kbuild b/arch/ia64/include/uapi/asm/Kbuild
index 5b819e5..1d5c4aa 100644
--- a/arch/ia64/include/uapi/asm/Kbuild
+++ b/arch/ia64/include/uapi/asm/Kbuild
@@ -1,4 +1,3 @@
include include/uapi/asm-generic/Kbuild.asm
generated-y += unistd_64.h
-generic-y += kvm_para.h
diff --git a/arch/m68k/include/asm/Kbuild b/arch/m68k/include/asm/Kbuild
index 95f8f63..2c359d9 100644
--- a/arch/m68k/include/asm/Kbuild
+++ b/arch/m68k/include/asm/Kbuild
@@ -13,6 +13,7 @@ generic-y += irq_work.h
generic-y += kdebug.h
generic-y += kmap_types.h
generic-y += kprobes.h
+generic-y += kvm_para.h
generic-y += local.h
generic-y += local64.h
generic-y += mcs_spinlock.h
diff --git a/arch/m68k/include/uapi/asm/Kbuild b/arch/m68k/include/uapi/asm/Kbuild
index 960bf1e..439f515 100644
--- a/arch/m68k/include/uapi/asm/Kbuild
+++ b/arch/m68k/include/uapi/asm/Kbuild
@@ -1,4 +1,3 @@
include include/uapi/asm-generic/Kbuild.asm
generated-y += unistd_32.h
-generic-y += kvm_para.h
diff --git a/arch/microblaze/include/asm/Kbuild b/arch/microblaze/include/asm/Kbuild
index 791cc8d5..1a8285c 100644
--- a/arch/microblaze/include/asm/Kbuild
+++ b/arch/microblaze/include/asm/Kbuild
@@ -17,6 +17,7 @@ generic-y += irq_work.h
generic-y += kdebug.h
generic-y += kmap_types.h
generic-y += kprobes.h
+generic-y += kvm_para.h
generic-y += linkage.h
generic-y += local.h
generic-y += local64.h
diff --git a/arch/microblaze/include/uapi/asm/Kbuild b/arch/microblaze/include/uapi/asm/Kbuild
index 97823ec..3f03cf6 100644
--- a/arch/microblaze/include/uapi/asm/Kbuild
+++ b/arch/microblaze/include/uapi/asm/Kbuild
@@ -1,5 +1,4 @@
include include/uapi/asm-generic/Kbuild.asm
generated-y += unistd_32.h
-generic-y += kvm_para.h
generic-y += ucontext.h
diff --git a/arch/mips/include/uapi/asm/Kbuild b/arch/mips/include/uapi/asm/Kbuild
index 0851c10..57dd982 100644
--- a/arch/mips/include/uapi/asm/Kbuild
+++ b/arch/mips/include/uapi/asm/Kbuild
@@ -6,3 +6,4 @@ generated-y += unistd_o32.h
generated-y += unistd_nr_n32.h
generated-y += unistd_nr_n64.h
generated-y += unistd_nr_o32.h
+generic-y += kvm_para.h
diff --git a/arch/mips/include/uapi/asm/kvm_para.h b/arch/mips/include/uapi/asm/kvm_para.h
deleted file mode 100644
index 7e16d7c..0000000
--- a/arch/mips/include/uapi/asm/kvm_para.h
+++ /dev/null
@@ -1,5 +0,0 @@
-#ifndef _UAPI_ASM_MIPS_KVM_PARA_H
-#define _UAPI_ASM_MIPS_KVM_PARA_H
-
-
-#endif /* _UAPI_ASM_MIPS_KVM_PARA_H */
diff --git a/arch/nios2/include/asm/Kbuild b/arch/nios2/include/asm/Kbuild
index 8fde4fa..88a667d 100644
--- a/arch/nios2/include/asm/Kbuild
+++ b/arch/nios2/include/asm/Kbuild
@@ -23,6 +23,7 @@ generic-y += irq_work.h
generic-y += kdebug.h
generic-y += kmap_types.h
generic-y += kprobes.h
+generic-y += kvm_para.h
generic-y += local.h
generic-y += mcs_spinlock.h
generic-y += mm-arch-hooks.h
diff --git a/arch/nios2/include/uapi/asm/Kbuild b/arch/nios2/include/uapi/asm/Kbuild
index 0febf1a..c1b06dc 100644
--- a/arch/nios2/include/uapi/asm/Kbuild
+++ b/arch/nios2/include/uapi/asm/Kbuild
@@ -1,4 +1,3 @@
include include/uapi/asm-generic/Kbuild.asm
-generic-y += kvm_para.h
generic-y += ucontext.h
diff --git a/arch/openrisc/include/asm/Kbuild b/arch/openrisc/include/asm/Kbuild
index 1f04844b..ad06de9 100644
--- a/arch/openrisc/include/asm/Kbuild
+++ b/arch/openrisc/include/asm/Kbuild
@@ -21,6 +21,7 @@ generic-y += irq_work.h
generic-y += kdebug.h
generic-y += kmap_types.h
generic-y += kprobes.h
+generic-y += kvm_para.h
generic-y += local.h
generic-y += mcs_spinlock.h
generic-y += mm-arch-hooks.h
diff --git a/arch/openrisc/include/uapi/asm/Kbuild b/arch/openrisc/include/uapi/asm/Kbuild
index 0febf1a..c1b06dc 100644
--- a/arch/openrisc/include/uapi/asm/Kbuild
+++ b/arch/openrisc/include/uapi/asm/Kbuild
@@ -1,4 +1,3 @@
include include/uapi/asm-generic/Kbuild.asm
-generic-y += kvm_para.h
generic-y += ucontext.h
diff --git a/arch/parisc/include/asm/Kbuild b/arch/parisc/include/asm/Kbuild
index 0b1e354..3abb960 100644
--- a/arch/parisc/include/asm/Kbuild
+++ b/arch/parisc/include/asm/Kbuild
@@ -12,6 +12,7 @@ generic-y += irq_regs.h
generic-y += irq_work.h
generic-y += kdebug.h
generic-y += kprobes.h
+generic-y += kvm_para.h
generic-y += local.h
generic-y += local64.h
generic-y += mcs_spinlock.h
diff --git a/arch/parisc/include/uapi/asm/Kbuild b/arch/parisc/include/uapi/asm/Kbuild
index c54353d..214a39a 100644
--- a/arch/parisc/include/uapi/asm/Kbuild
+++ b/arch/parisc/include/uapi/asm/Kbuild
@@ -2,4 +2,3 @@ include include/uapi/asm-generic/Kbuild.asm
generated-y += unistd_32.h
generated-y += unistd_64.h
-generic-y += kvm_para.h
diff --git a/arch/s390/include/uapi/asm/Kbuild b/arch/s390/include/uapi/asm/Kbuild
index da3e0d4..96ad5d7 100644
--- a/arch/s390/include/uapi/asm/Kbuild
+++ b/arch/s390/include/uapi/asm/Kbuild
@@ -3,3 +3,4 @@ include include/uapi/asm-generic/Kbuild.asm
generated-y += unistd_32.h
generated-y += unistd_64.h
+generic-y += kvm_para.h
diff --git a/arch/s390/include/uapi/asm/kvm_para.h b/arch/s390/include/uapi/asm/kvm_para.h
deleted file mode 100644
index b9ab584..0000000
--- a/arch/s390/include/uapi/asm/kvm_para.h
+++ /dev/null
@@ -1,8 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- * User API definitions for paravirtual devices on s390
- *
- * Copyright IBM Corp. 2008
- *
- * Author(s): Christian Borntraeger <borntraeger@...ibm.com>
- */
diff --git a/arch/sh/include/asm/Kbuild b/arch/sh/include/asm/Kbuild
index a6ef3fe..7bf2cb6 100644
--- a/arch/sh/include/asm/Kbuild
+++ b/arch/sh/include/asm/Kbuild
@@ -9,6 +9,7 @@ generic-y += emergency-restart.h
generic-y += exec.h
generic-y += irq_regs.h
generic-y += irq_work.h
+generic-y += kvm_para.h
generic-y += local.h
generic-y += local64.h
generic-y += mcs_spinlock.h
diff --git a/arch/sh/include/uapi/asm/Kbuild b/arch/sh/include/uapi/asm/Kbuild
index eaa30bc..0ec45ff 100644
--- a/arch/sh/include/uapi/asm/Kbuild
+++ b/arch/sh/include/uapi/asm/Kbuild
@@ -2,5 +2,4 @@
include include/uapi/asm-generic/Kbuild.asm
generated-y += unistd_32.h
-generic-y += kvm_para.h
generic-y += ucontext.h
diff --git a/arch/sparc/include/asm/Kbuild b/arch/sparc/include/asm/Kbuild
index b82f64e..a22cfd5 100644
--- a/arch/sparc/include/asm/Kbuild
+++ b/arch/sparc/include/asm/Kbuild
@@ -9,6 +9,7 @@ generic-y += exec.h
generic-y += export.h
generic-y += irq_regs.h
generic-y += irq_work.h
+generic-y += kvm_para.h
generic-y += linkage.h
generic-y += local.h
generic-y += local64.h
diff --git a/arch/sparc/include/uapi/asm/kvm_para.h b/arch/sparc/include/uapi/asm/kvm_para.h
deleted file mode 100644
index baacc49..0000000
--- a/arch/sparc/include/uapi/asm/kvm_para.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#include <asm-generic/kvm_para.h>
diff --git a/arch/unicore32/include/asm/Kbuild b/arch/unicore32/include/asm/Kbuild
index 1d1544b..d77d953 100644
--- a/arch/unicore32/include/asm/Kbuild
+++ b/arch/unicore32/include/asm/Kbuild
@@ -18,6 +18,7 @@ generic-y += irq_work.h
generic-y += kdebug.h
generic-y += kmap_types.h
generic-y += kprobes.h
+generic-y += kvm_para.h
generic-y += local.h
generic-y += mcs_spinlock.h
generic-y += mm-arch-hooks.h
diff --git a/arch/unicore32/include/uapi/asm/Kbuild b/arch/unicore32/include/uapi/asm/Kbuild
index 0febf1a..c1b06dc 100644
--- a/arch/unicore32/include/uapi/asm/Kbuild
+++ b/arch/unicore32/include/uapi/asm/Kbuild
@@ -1,4 +1,3 @@
include include/uapi/asm-generic/Kbuild.asm
-generic-y += kvm_para.h
generic-y += ucontext.h
diff --git a/arch/xtensa/include/asm/Kbuild b/arch/xtensa/include/asm/Kbuild
index e255683..d474c34 100644
--- a/arch/xtensa/include/asm/Kbuild
+++ b/arch/xtensa/include/asm/Kbuild
@@ -15,6 +15,7 @@ generic-y += irq_work.h
generic-y += kdebug.h
generic-y += kmap_types.h
generic-y += kprobes.h
+generic-y += kvm_para.h
generic-y += linkage.h
generic-y += local.h
generic-y += local64.h
diff --git a/arch/xtensa/include/uapi/asm/Kbuild b/arch/xtensa/include/uapi/asm/Kbuild
index 960bf1e..439f515 100644
--- a/arch/xtensa/include/uapi/asm/Kbuild
+++ b/arch/xtensa/include/uapi/asm/Kbuild
@@ -1,4 +1,3 @@
include include/uapi/asm-generic/Kbuild.asm
generated-y += unistd_32.h
-generic-y += kvm_para.h
diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
index 5f24b50..059dc2b 100644
--- a/include/uapi/linux/Kbuild
+++ b/include/uapi/linux/Kbuild
@@ -7,5 +7,7 @@ no-export-headers += kvm.h
endif
ifeq ($(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/kvm_para.h),)
+ifeq ($(wildcard $(objtree)/arch/$(SRCARCH)/include/generated/uapi/asm/kvm_para.h),)
no-export-headers += kvm_para.h
endif
+endif
--
2.7.4
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