Commit-ID: 36fd4f0249f8cb445835acb7c6937a0ffa2b5f14 Gitweb: http://git.kernel.org/tip/36fd4f0249f8cb445835acb7c6937a0ffa2b5f14 Author: Andy Lutomirski <luto@xxxxxxxxxx> AuthorDate: Mon, 31 Oct 2016 15:18:42 -0700 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitDate: Tue, 1 Nov 2016 07:47:53 +0100 x86/fpu: Get rid of two redundant clts() calls CR0.TS is cleared by a direct CR0 write in fpu__init_cpu_generic(). We don't need to call clts() two more times right after that. Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxxxx> Cc: Brian Gerst <brgerst@xxxxxxxxx> Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> Cc: Denys Vlasenko <dvlasenk@xxxxxxxxxx> Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx> Cc: H. Peter Anvin <hpa@xxxxxxxxx> Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Oleg Nesterov <oleg@xxxxxxxxxx> Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Quentin Casasnovas <quentin.casasnovas@xxxxxxxxxx> Cc: Rik van Riel <riel@xxxxxxxxxx> Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: kvm list <kvm@xxxxxxxxxxxxxxx> Link: http://lkml.kernel.org/r/476d2d5066eda24838853426ea74c94140b50c85.1477951965.git.luto@xxxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> --- arch/x86/kernel/fpu/init.c | 18 ------------------ 1 file changed, 18 deletions(-) diff --git a/arch/x86/kernel/fpu/init.c b/arch/x86/kernel/fpu/init.c index 1a09d13..60dece3 100644 --- a/arch/x86/kernel/fpu/init.c +++ b/arch/x86/kernel/fpu/init.c @@ -10,15 +10,6 @@ #include <linux/init.h> /* - * Initialize the TS bit in CR0 according to the style of context-switches - * we are using: - */ -static void fpu__init_cpu_ctx_switch(void) -{ - clts(); -} - -/* * Initialize the registers found in all CPUs, CR0 and CR4: */ static void fpu__init_cpu_generic(void) @@ -55,7 +46,6 @@ void fpu__init_cpu(void) { fpu__init_cpu_generic(); fpu__init_cpu_xstate(); - fpu__init_cpu_ctx_switch(); } /* @@ -290,14 +280,6 @@ void __init fpu__init_system(struct cpuinfo_x86 *c) */ fpu__init_cpu(); - /* - * But don't leave CR0::TS set yet, as some of the FPU setup - * methods depend on being able to execute FPU instructions - * that will fault on a set TS, such as the FXSAVE in - * fpu__init_system_mxcsr(). - */ - clts(); - fpu__init_system_generic(); fpu__init_system_xstate_size_legacy(); fpu__init_system_xstate(); -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
