diff options
| author | Ingo Molnar <mingo@kernel.org> | 2015-04-23 13:13:04 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-05-19 16:47:23 +0300 |
| commit | b0c050c5ba130c0ccb1b86b64f162a4601d160c7 (patch) | |
| tree | ac379417b77210f510fb3e7b6457ffbc4005cf44 /arch | |
| parent | 36fe6175be15d33fec7c6aa53e6e202ad44f0b25 (diff) | |
| download | linux-b0c050c5ba130c0ccb1b86b64f162a4601d160c7.tar.xz | |
x86/fpu: Move 'PER_CPU(fpu_owner_task)' to fpu/core.c
Move it closer to other per-cpu FPU data structures.
This also unifies the 32-bit and 64-bit code.
Reviewed-by: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/cpu/common.c | 3 | ||||
| -rw-r--r-- | arch/x86/kernel/fpu/core.c | 5 |
2 files changed, 5 insertions, 3 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 220ad95e0e28..88bb7a75f5c6 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -1182,8 +1182,6 @@ DEFINE_PER_CPU(unsigned int, irq_count) __visible = -1; DEFINE_PER_CPU(int, __preempt_count) = INIT_PREEMPT_COUNT; EXPORT_PER_CPU_SYMBOL(__preempt_count); -DEFINE_PER_CPU(struct task_struct *, fpu_owner_task); - /* * Special IST stacks which the CPU switches to when it calls * an IST-marked descriptor entry. Up to 7 stacks (hardware @@ -1274,7 +1272,6 @@ DEFINE_PER_CPU(struct task_struct *, current_task) = &init_task; EXPORT_PER_CPU_SYMBOL(current_task); DEFINE_PER_CPU(int, __preempt_count) = INIT_PREEMPT_COUNT; EXPORT_PER_CPU_SYMBOL(__preempt_count); -DEFINE_PER_CPU(struct task_struct *, fpu_owner_task); /* * On x86_32, vm86 modifies tss.sp0, so sp0 isn't a reliable way to find diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index 29b837730a07..d29fec70e6b3 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -20,6 +20,11 @@ */ static DEFINE_PER_CPU(bool, in_kernel_fpu); +/* + * Track which task is using the FPU on the CPU: + */ +DEFINE_PER_CPU(struct task_struct *, fpu_owner_task); + static void kernel_fpu_disable(void) { WARN_ON(this_cpu_read(in_kernel_fpu)); |