diff options
Diffstat (limited to 'arch/x86/entry')
| -rw-r--r-- | arch/x86/entry/common.c | 2 | ||||
| -rw-r--r-- | arch/x86/entry/thunk_32.S | 2 | ||||
| -rw-r--r-- | arch/x86/entry/thunk_64.S | 2 | ||||
| -rw-r--r-- | arch/x86/entry/vdso/vclock_gettime.c | 17 | ||||
| -rw-r--r-- | arch/x86/entry/vdso/vgetcpu.c | 2 | ||||
| -rw-r--r-- | arch/x86/entry/vdso/vma.c | 2 | ||||
| -rw-r--r-- | arch/x86/entry/vsyscall/Makefile | 1 | ||||
| -rw-r--r-- | arch/x86/entry/vsyscall/vsyscall_emu_64.S | 3 |
8 files changed, 21 insertions, 10 deletions
diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c index a986b3c8294c..2418804e66b4 100644 --- a/arch/x86/entry/common.c +++ b/arch/x86/entry/common.c @@ -1,7 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * common.c - C code for kernel entry and exit * Copyright (c) 2015 Andrew Lutomirski - * GPL v2 * * Based on asm and ptrace code by many authors. The code here originated * in ptrace.c and signal.c. diff --git a/arch/x86/entry/thunk_32.S b/arch/x86/entry/thunk_32.S index fee6bc79b987..cb3464525b37 100644 --- a/arch/x86/entry/thunk_32.S +++ b/arch/x86/entry/thunk_32.S @@ -1,8 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * Trampoline to trace irqs off. (otherwise CALLER_ADDR1 might crash) * Copyright 2008 by Steven Rostedt, Red Hat, Inc * (inspired by Andi Kleen's thunk_64.S) - * Subject to the GNU public license, v.2. No warranty of any kind. */ #include <linux/linkage.h> #include <asm/asm.h> diff --git a/arch/x86/entry/thunk_64.S b/arch/x86/entry/thunk_64.S index be36bf4e0957..cfdca8b42c70 100644 --- a/arch/x86/entry/thunk_64.S +++ b/arch/x86/entry/thunk_64.S @@ -1,9 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * Save registers before calling assembly functions. This avoids * disturbance of register allocation in some inline assembly constructs. * Copyright 2001,2002 by Andi Kleen, SuSE Labs. * Added trace_hardirqs callers - Copyright 2007 Steven Rostedt, Red Hat, Inc. - * Subject to the GNU public license, v.2. No warranty of any kind. */ #include <linux/linkage.h> #include "calling.h" diff --git a/arch/x86/entry/vdso/vclock_gettime.c b/arch/x86/entry/vdso/vclock_gettime.c index 98c7d12b945c..4aed41f638bb 100644 --- a/arch/x86/entry/vdso/vclock_gettime.c +++ b/arch/x86/entry/vdso/vclock_gettime.c @@ -1,6 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2006 Andi Kleen, SUSE Labs. - * Subject to the GNU Public License, v.2 * * Fast user context implementation of clock_gettime, gettimeofday, and time. * @@ -128,13 +128,24 @@ notrace static inline u64 vgetcyc(int mode) { if (mode == VCLOCK_TSC) return (u64)rdtsc_ordered(); + + /* + * For any memory-mapped vclock type, we need to make sure that gcc + * doesn't cleverly hoist a load before the mode check. Otherwise we + * might end up touching the memory-mapped page even if the vclock in + * question isn't enabled, which will segfault. Hence the barriers. + */ #ifdef CONFIG_PARAVIRT_CLOCK - else if (mode == VCLOCK_PVCLOCK) + if (mode == VCLOCK_PVCLOCK) { + barrier(); return vread_pvclock(); + } #endif #ifdef CONFIG_HYPERV_TSCPAGE - else if (mode == VCLOCK_HVCLOCK) + if (mode == VCLOCK_HVCLOCK) { + barrier(); return vread_hvclock(); + } #endif return U64_MAX; } diff --git a/arch/x86/entry/vdso/vgetcpu.c b/arch/x86/entry/vdso/vgetcpu.c index f86ab0ae1777..b88a82bbc359 100644 --- a/arch/x86/entry/vdso/vgetcpu.c +++ b/arch/x86/entry/vdso/vgetcpu.c @@ -1,6 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2006 Andi Kleen, SUSE Labs. - * Subject to the GNU Public License, v.2 * * Fast user context implementation of getcpu() */ diff --git a/arch/x86/entry/vdso/vma.c b/arch/x86/entry/vdso/vma.c index babc4e7a519c..8db1f594e8b1 100644 --- a/arch/x86/entry/vdso/vma.c +++ b/arch/x86/entry/vdso/vma.c @@ -1,6 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2007 Andi Kleen, SUSE Labs. - * Subject to the GPL, v.2 * * This contains most of the x86 vDSO kernel-side code. */ diff --git a/arch/x86/entry/vsyscall/Makefile b/arch/x86/entry/vsyscall/Makefile index a9f4856f622a..1ac4dd116c26 100644 --- a/arch/x86/entry/vsyscall/Makefile +++ b/arch/x86/entry/vsyscall/Makefile @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only # # Makefile for the x86 low level vsyscall code # diff --git a/arch/x86/entry/vsyscall/vsyscall_emu_64.S b/arch/x86/entry/vsyscall/vsyscall_emu_64.S index c9596a9af159..2e203f3a25a7 100644 --- a/arch/x86/entry/vsyscall/vsyscall_emu_64.S +++ b/arch/x86/entry/vsyscall/vsyscall_emu_64.S @@ -1,9 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * vsyscall_emu_64.S: Vsyscall emulation page * * Copyright (c) 2011 Andy Lutomirski - * - * Subject to the GNU General Public License, version 2 */ #include <linux/linkage.h> |