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| author | Ingo Molnar <mingo@kernel.org> | 2015-04-29 20:35:33 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-05-19 15:48:04 +0200 |
| commit | 04c8e01d50ae1f2b33a46459e8b1e776b747e97d (patch) | |
| tree | d70f20fca8637d309c323959af039a60f8ab23d5 /arch/x86 | |
| parent | 6ffc152e4606c7f9149940d36a83e786f7f0a4f9 (diff) | |
| download | op-kernel-dev-04c8e01d50ae1f2b33a46459e8b1e776b747e97d.zip op-kernel-dev-04c8e01d50ae1f2b33a46459e8b1e776b747e97d.tar.gz | |
x86/fpu: Move fpu__clear() to 'struct fpu *' parameter passing
Do it like all other high level FPU state handling functions: they
only know about struct fpu, not about the task.
(Also remove a dead prototype while at it.)
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
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/x86')
| -rw-r--r-- | arch/x86/include/asm/fpu/internal.h | 5 | ||||
| -rw-r--r-- | arch/x86/kernel/fpu/core.c | 6 | ||||
| -rw-r--r-- | arch/x86/kernel/process.c | 2 |
3 files changed, 5 insertions, 8 deletions
diff --git a/arch/x86/include/asm/fpu/internal.h b/arch/x86/include/asm/fpu/internal.h index f20a003..d6ac461 100644 --- a/arch/x86/include/asm/fpu/internal.h +++ b/arch/x86/include/asm/fpu/internal.h @@ -37,9 +37,8 @@ int ia32_setup_frame(int sig, struct ksignal *ksig, #define MXCSR_DEFAULT 0x1f80 extern unsigned int mxcsr_feature_mask; -extern void fpu__init_cpu(void); -extern void eager_fpu_init(void); +extern void fpu__init_cpu(void); extern void fpu__init_system_xstate(void); extern void fpu__init_cpu_xstate(void); extern void fpu__init_system(struct cpuinfo_x86 *c); @@ -57,7 +56,7 @@ extern void fpu__restore(void); extern void fpu__drop(struct fpu *fpu); extern int fpu__copy(struct fpu *dst_fpu, struct fpu *src_fpu); extern void fpu__reset(struct fpu *fpu); -extern void fpu__clear(struct task_struct *tsk); +extern void fpu__clear(struct fpu *fpu); extern void fpu__init_check_bugs(void); extern void fpu__resume_cpu(void); diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index acca83b..0ccdd83 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -390,11 +390,9 @@ void fpu__reset(struct fpu *fpu) * Called by sys_execve() to clear the FPU fpregs, so that FPU state * of the previous binary does not leak over into the exec()ed binary: */ -void fpu__clear(struct task_struct *tsk) +void fpu__clear(struct fpu *fpu) { - struct fpu *fpu = &tsk->thread.fpu; - - WARN_ON_ONCE(tsk != current); /* Almost certainly an anomaly */ + WARN_ON_ONCE(fpu != ¤t->thread.fpu); /* Almost certainly an anomaly */ if (!use_eager_fpu()) { /* FPU state will be reallocated lazily at the first use. */ diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index dde263f..b53f6c9 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -120,7 +120,7 @@ void flush_thread(void) flush_ptrace_hw_breakpoint(tsk); memset(tsk->thread.tls_array, 0, sizeof(tsk->thread.tls_array)); - fpu__clear(tsk); + fpu__clear(&tsk->thread.fpu); } static void hard_disable_TSC(void) |
