1 files changed, 0 insertions, 53 deletions
diff --git a/debian/patches-rt/0024-x86-fpu-Add-a-fastpath-to-__fpu__restore_sig.patch b/debian/patches-rt/0024-x86-fpu-Add-a-fastpath-to-__fpu__restore_sig.patch
deleted file mode 100644
index 11691160a..000000000
--- a/debian/patches-rt/0024-x86-fpu-Add-a-fastpath-to-__fpu__restore_sig.patch
+++ /dev/null
@@ -1,53 +0,0 @@
-From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
-Date: Tue, 2 Apr 2019 13:02:25 +0200
-Subject: [PATCH 24/27] x86/fpu: Add a fastpath to __fpu__restore_sig()
-Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.0/older/patches-5.0.10-rt7.tar.xz
-
-The previous commits refactor the restoration of the FPU registers so
-that they can be loaded from in-kernel memory. This overhead can be
-avoided if the load can be performed without a pagefault.
-
-Attempt to restore FPU registers by invoking
-copy_user_to_fpregs_zeroing(). If it fails try the slowpath which can handle
-pagefaults.
-
-Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
----
- arch/x86/kernel/fpu/signal.c |   16 ++++++++++++++--
- 1 file changed, 14 insertions(+), 2 deletions(-)
-
---- a/arch/x86/kernel/fpu/signal.c
-+++ b/arch/x86/kernel/fpu/signal.c
-@@ -242,10 +242,10 @@ sanitize_restored_xstate(union fpregs_st
- /*
-  * Restore the extended state if present. Otherwise, restore the FP/SSE state.
-  */
--static inline int copy_user_to_fpregs_zeroing(void __user *buf, u64 xbv, int fx_only)
-+static int copy_user_to_fpregs_zeroing(void __user *buf, u64 xbv, int fx_only)
- {
- 	if (use_xsave()) {
--		if ((unsigned long)buf % 64 || fx_only) {
-+		if (fx_only) {
- 			u64 init_bv = xfeatures_mask & ~XFEATURE_MASK_FPSSE;
- 			copy_kernel_to_xregs(&init_fpstate.xsave, init_bv);
- 			return copy_user_to_fxregs(buf);
-@@ -327,7 +327,19 @@ static int __fpu__restore_sig(void __use
- 		if (ret)
- 			goto err_out;
- 		envp = &env;
-+	} else {
-+		fpregs_lock();
-+		pagefault_disable();
-+		ret = copy_user_to_fpregs_zeroing(buf_fx, xfeatures, fx_only);
-+		pagefault_enable();
-+		if (!ret) {
-+			fpregs_mark_activate();
-+			fpregs_unlock();
-+			return 0;
-+		}
-+		fpregs_unlock();
- 	}
-+
- 	if (use_xsave() && !fx_only) {
- 		u64 init_bv = xfeatures_mask & ~xfeatures;
-