x86/fpu: Standardize the parameter type of copy_kernel_to_fpregs()
authorIngo Molnar <mingo@kernel.org>
Mon, 25 May 2015 09:59:35 +0000 (11:59 +0200)
committerIngo Molnar <mingo@kernel.org>
Wed, 27 May 2015 12:11:32 +0000 (14:11 +0200)
commit003e2e8b57e79709e4973f6cb48381b2ba396680
tree51c7d2f09c0c053d9bd40e83456f1d268edaff5c
parent9ccc27a5d297503e485373b69688d038a1d8e662
x86/fpu: Standardize the parameter type of copy_kernel_to_fpregs()

Bring the __copy_fpstate_to_fpregs() and copy_fpstate_to_fpregs() functions
in line with the parameter passing convention of other kernel-to-FPU-registers
copying functions: pass around an in-memory FPU register state pointer,
instead of struct fpu *.

NOTE: This patch also changes the assembly constraint of the FXSAVE-leak
      workaround from 'fpu->fpregs_active' to 'fpstate' - but that is fine,
      as we only need a valid memory address there for the FILDL instruction.

Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Bobby Powers <bobbypowers@gmail.com>
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: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/include/asm/fpu/internal.h
arch/x86/kernel/fpu/core.c
arch/x86/kvm/x86.c