7b77c27caa
In 5.0er these function were removed from the public interface also zfs needs them for AVX/AES-NI support. Without this patch for example throughput on a encrypted zfs dataset drops to 200 MB/s from 1.2 GB/s. These functions were removed as their was no user within the linux kernel tree itself.
60 lines
1.8 KiB
Diff
60 lines
1.8 KiB
Diff
From 245e0f743d814c9ff2d1c748175e321301eb16cf Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
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Date: Thu, 2 May 2019 05:28:08 +0100
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Subject: [PATCH] x86/fpu: Export __kernel_fpu_{begin,end}()
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This partially undo commit:
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12209993 x86/fpu: Don't export __kernel_fpu_{begin,end}()
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We need this symbol in zfs for AES-NI/AVX support.
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---
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arch/x86/include/asm/fpu/api.h | 2 ++
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arch/x86/kernel/fpu/core.c | 6 ++++--
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2 files changed, 6 insertions(+), 2 deletions(-)
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diff --git a/arch/x86/include/asm/fpu/api.h b/arch/x86/include/asm/fpu/api.h
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index b56d504af6545..7d53388d266ea 100644
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--- a/arch/x86/include/asm/fpu/api.h
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+++ b/arch/x86/include/asm/fpu/api.h
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@@ -18,6 +18,8 @@
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* If you intend to use the FPU in softirq you need to check first with
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* irq_fpu_usable() if it is possible.
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*/
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+extern void __kernel_fpu_begin(void);
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+extern void __kernel_fpu_end(void);
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extern void kernel_fpu_begin(void);
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extern void kernel_fpu_end(void);
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extern bool irq_fpu_usable(void);
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diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c
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index 2e5003fef51a9..2ea85b32421a0 100644
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--- a/arch/x86/kernel/fpu/core.c
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+++ b/arch/x86/kernel/fpu/core.c
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@@ -93,7 +93,7 @@ bool irq_fpu_usable(void)
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}
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EXPORT_SYMBOL(irq_fpu_usable);
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-static void __kernel_fpu_begin(void)
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+void __kernel_fpu_begin(void)
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{
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struct fpu *fpu = ¤t->thread.fpu;
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@@ -111,8 +111,9 @@ static void __kernel_fpu_begin(void)
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__cpu_invalidate_fpregs_state();
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}
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}
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+EXPORT_SYMBOL(__kernel_fpu_begin);
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-static void __kernel_fpu_end(void)
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+void __kernel_fpu_end(void)
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{
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struct fpu *fpu = ¤t->thread.fpu;
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@@ -121,6 +122,7 @@ static void __kernel_fpu_end(void)
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kernel_fpu_enable();
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}
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+EXPORT_SYMBOL(__kernel_fpu_end);
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void kernel_fpu_begin(void)
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{
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