[PATCH nixpkgs 1/4] kernelPatches: drop export_kernel_fpu_functions

[Alyssa Ross <hi@alyssa.is>]

From: Atemu <atemu.main@gmail.com>

Hasn't been necessary since ZFS 0.8.3

(cherry picked from commit 88f877e07def90a2c77106b86802b143ca8f97b3)

Backporting this for Spectrum because it won't apply to future CrOS
kernels.
---
 .../export_kernel_fpu_functions_4_14.patch    | 60 -------------------
 .../export_kernel_fpu_functions_5_3.patch     | 42 -------------
 pkgs/os-specific/linux/kernel/patches.nix     | 11 ----
 pkgs/top-level/all-packages.nix               |  6 --
 4 files changed, 119 deletions(-)
 delete mode 100644 pkgs/os-specific/linux/kernel/export_kernel_fpu_functions_4_14.patch
 delete mode 100644 pkgs/os-specific/linux/kernel/export_kernel_fpu_functions_5_3.patch

diff --git a/pkgs/os-specific/linux/kernel/export_kernel_fpu_functions_4_14.patch b/pkgs/os-specific/linux/kernel/export_kernel_fpu_functions_4_14.patch
deleted file mode 100644
index 205497aee2d..00000000000
--- a/pkgs/os-specific/linux/kernel/export_kernel_fpu_functions_4_14.patch
+++ /dev/null
@@ -1,60 +0,0 @@
-From 245e0f743d814c9ff2d1c748175e321301eb16cf Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
-Date: Thu, 2 May 2019 05:28:08 +0100
-Subject: [PATCH] x86/fpu: Export __kernel_fpu_{begin,end}()
-
-This partially undo commit:
-
-12209993  x86/fpu: Don't export __kernel_fpu_{begin,end}()
-
-We need this symbol in zfs for AES-NI/AVX support.
----
- arch/x86/include/asm/fpu/api.h | 2 ++
- arch/x86/kernel/fpu/core.c     | 6 ++++--
- 2 files changed, 6 insertions(+), 2 deletions(-)
-
-diff --git a/arch/x86/include/asm/fpu/api.h b/arch/x86/include/asm/fpu/api.h
-index b56d504af6545..7d53388d266ea 100644
---- a/arch/x86/include/asm/fpu/api.h
-+++ b/arch/x86/include/asm/fpu/api.h
-@@ -18,6 +18,8 @@
-  * If you intend to use the FPU in softirq you need to check first with
-  * irq_fpu_usable() if it is possible.
-  */
-+extern void __kernel_fpu_begin(void);
-+extern void __kernel_fpu_end(void);
- extern void kernel_fpu_begin(void);
- extern void kernel_fpu_end(void);
- extern bool irq_fpu_usable(void);
-diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c
-index 2e5003fef51a9..2ea85b32421a0 100644
---- a/arch/x86/kernel/fpu/core.c
-+++ b/arch/x86/kernel/fpu/core.c
-@@ -93,7 +93,7 @@ bool irq_fpu_usable(void)
- }
- EXPORT_SYMBOL(irq_fpu_usable);
- 
--static void __kernel_fpu_begin(void)
-+void __kernel_fpu_begin(void)
- {
- 	struct fpu *fpu = &current->thread.fpu;
- 
-@@ -111,8 +111,9 @@ static void __kernel_fpu_begin(void)
- 		__cpu_invalidate_fpregs_state();
- 	}
- }
-+EXPORT_SYMBOL(__kernel_fpu_begin);
- 
--static void __kernel_fpu_end(void)
-+void __kernel_fpu_end(void)
- {
- 	struct fpu *fpu = &current->thread.fpu;
- 
-@@ -121,6 +122,7 @@ static void __kernel_fpu_end(void)
- 
- 	kernel_fpu_enable();
- }
-+EXPORT_SYMBOL(__kernel_fpu_end);
- 
- void kernel_fpu_begin(void)
- {
diff --git a/pkgs/os-specific/linux/kernel/export_kernel_fpu_functions_5_3.patch b/pkgs/os-specific/linux/kernel/export_kernel_fpu_functions_5_3.patch
deleted file mode 100644
index dc9ca64bdc1..00000000000
--- a/pkgs/os-specific/linux/kernel/export_kernel_fpu_functions_5_3.patch
+++ /dev/null
@@ -1,42 +0,0 @@
-From 1e010beda2896bdf3082fb37a3e49f8ce20e04d8 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
-Date: Thu, 2 May 2019 05:28:08 +0100
-Subject: [PATCH] x86/fpu: Export kernel_fpu_{begin,end}() with
- EXPORT_SYMBOL_GPL
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-We need these symbols in zfs as the fpu implementation breaks userspace:
-
-https://github.com/zfsonlinux/zfs/issues/9346
-Signed-off-by: Jörg Thalheim <joerg@thalheim.io>
----
- arch/x86/kernel/fpu/core.c | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c
-index 12c70840980e..352538b3bb5d 100644
---- a/arch/x86/kernel/fpu/core.c
-+++ b/arch/x86/kernel/fpu/core.c
-@@ -102,7 +102,7 @@ void kernel_fpu_begin(void)
- 	}
- 	__cpu_invalidate_fpregs_state();
- }
--EXPORT_SYMBOL_GPL(kernel_fpu_begin);
-+EXPORT_SYMBOL(kernel_fpu_begin);
- 
- void kernel_fpu_end(void)
- {
-@@ -111,7 +111,7 @@ void kernel_fpu_end(void)
- 	this_cpu_write(in_kernel_fpu, false);
- 	preempt_enable();
- }
--EXPORT_SYMBOL_GPL(kernel_fpu_end);
-+EXPORT_SYMBOL(kernel_fpu_end);
- 
- /*
-  * Save the FPU state (mark it for reload if necessary):
--- 
-2.23.0
-
diff --git a/pkgs/os-specific/linux/kernel/patches.nix b/pkgs/os-specific/linux/kernel/patches.nix
index 8ce1ac2b587..678cec34b70 100644
--- a/pkgs/os-specific/linux/kernel/patches.nix
+++ b/pkgs/os-specific/linux/kernel/patches.nix
@@ -76,17 +76,6 @@
     };
   };
 
-  export_kernel_fpu_functions = {
-    "4.14" = {
-      name = "export_kernel_fpu_functions";
-      patch = ./export_kernel_fpu_functions_4_14.patch;
-    };
-    "5.3" = {
-      name = "export_kernel_fpu_functions";
-      patch = ./export_kernel_fpu_functions_5_3.patch;
-    };
-  };
-
   # patches from https://lkml.org/lkml/2019/7/15/1748
   mac_nvme_t2 = rec {
     name = "mac_nvme_t2";
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index c22a62456db..6ba0505cb8a 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -17500,7 +17500,6 @@ in
         # when adding a new linux version
         kernelPatches.cpu-cgroup-v2."4.11"
         kernelPatches.modinst_arg_list_too_long
-        kernelPatches.export_kernel_fpu_functions."4.14"
       ];
   };
 
@@ -17509,7 +17508,6 @@ in
       [ kernelPatches.bridge_stp_helper
         kernelPatches.request_key_helper
         kernelPatches.modinst_arg_list_too_long
-        kernelPatches.export_kernel_fpu_functions."4.14"
       ];
   };
 
@@ -17517,7 +17515,6 @@ in
     kernelPatches = [
       kernelPatches.bridge_stp_helper
       kernelPatches.request_key_helper
-      kernelPatches.export_kernel_fpu_functions."5.3"
     ];
   };
 
@@ -17525,7 +17522,6 @@ in
     kernelPatches = [
       kernelPatches.bridge_stp_helper
       kernelPatches.request_key_helper
-      kernelPatches.export_kernel_fpu_functions."5.3"
     ];
   };
 
@@ -17533,7 +17529,6 @@ in
     kernelPatches = [
       kernelPatches.bridge_stp_helper
       kernelPatches.request_key_helper
-      kernelPatches.export_kernel_fpu_functions."5.3"
     ];
   };
 
@@ -17563,7 +17558,6 @@ in
     kernelPatches = [
       kernelPatches.bridge_stp_helper
       kernelPatches.request_key_helper
-      kernelPatches.export_kernel_fpu_functions."5.3"
     ];
   };
 
-- 
2.31.1