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| author | Ingo Molnar <mingo@kernel.org> | 2015-04-24 02:28:23 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-05-19 15:47:29 +0200 |
| commit | 2e8a3102662233dfac92fe70f56429b4050f674a (patch) | |
| tree | 9482840063695ccf55e88e8ee9393b22df9a1898 /arch/x86/kernel | |
| parent | cc08d5459905a4155cb77e5fe25f396b4c622b7d (diff) | |
| download | linux-2e8a3102662233dfac92fe70f56429b4050f674a.tar.gz linux-2e8a3102662233dfac92fe70f56429b4050f674a.tar.bz2 linux-2e8a3102662233dfac92fe70f56429b4050f674a.zip | |
x86/fpu: Rename fpu__flush_thread() to fpu__clear()
The primary purpose of this function is to clear the current task's
FPU before an exec(), to not leak information from the previous task,
and to allow the new task to start with freshly initialized FPU
registers.
Rename the function to reflect this primary purpose.
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/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/fpu/core.c | 4 | ||||
| -rw-r--r-- | arch/x86/kernel/process.c | 2 |
2 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index e3e8585284ad..c15d064ce43e 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -381,11 +381,11 @@ void fpu__restore(void) } EXPORT_SYMBOL_GPL(fpu__restore); -void fpu__flush_thread(struct task_struct *tsk) +void fpu__clear(struct task_struct *tsk) { struct fpu *fpu = &tsk->thread.fpu; - WARN_ON(tsk != current); + WARN_ON_ONCE(tsk != current); /* 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 e97266b18ad3..51ad3422e728 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -130,7 +130,7 @@ void flush_thread(void) flush_ptrace_hw_breakpoint(tsk); memset(tsk->thread.tls_array, 0, sizeof(tsk->thread.tls_array)); - fpu__flush_thread(tsk); + fpu__clear(tsk); } static void hard_disable_TSC(void) |