Commit 4af08f2f authored Apr 03, 2015 by Ingo Molnar

x86/fpu: Add comments to fpu__save() and restrict its export

Add an explanation to fpu__save() and also don't export it to
random modules - we don't want them to futz around with deep kernel
internals.

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>

parent 0a781551

arch/x86/kernel/i387.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -117,6 +117,9 @@ void __kernel_fpu_end(void)
		}
		EXPORT_SYMBOL(__kernel_fpu_end);

		/*
		* Save the FPU state (initialize it if necessary):
		*/
		void fpu__save(struct task_struct *tsk)
		{
		preempt_disable();
		@@ -130,7 +133,7 @@ void fpu__save(struct task_struct *tsk)
		}
		preempt_enable();
		}
		EXPORT_SYMBOL(fpu__save);
		EXPORT_SYMBOL_GPL(fpu__save);

		unsigned int mxcsr_feature_mask __read_mostly = 0xffffffffu;
		unsigned int xstate_size;