x86/fpu: Use 'struct fpu' in fpu__copy()

Migrate this function to pure 'struct fpu' usage.

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>

diff --git a/arch/x86/include/asm/fpu-internal.h b/arch/x86/include/asm/fpu-internal.h
index 6b84399c88399f5f4c2580f17a42aa3851fbf715..21ad681794548b47e8e5bf186cf12bfee5252143 100644 (file)
--- a/arch/x86/include/asm/fpu-internal.h
+++ b/arch/x86/include/asm/fpu-internal.h
@@ -535,7 +535,7 @@ extern void fpstate_cache_init(void);
 
 extern int fpstate_alloc(struct fpu *fpu);
 extern void fpstate_free(struct fpu *fpu);
-extern int fpu__copy(struct task_struct *dst, struct task_struct *src);
+extern int fpu__copy(struct fpu *dst_fpu, struct fpu *src_fpu);
 
 static inline unsigned long
 alloc_mathframe(unsigned long sp, int ia32_frame, unsigned long *buf_fx,

diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c
index 9aaba6abfae3887cc81926471f6b08e8a1c5737f..a8435857523558ee80a036ec6bec5a1a3dff2487 100644 (file)
--- a/arch/x86/kernel/fpu/core.c
+++ b/arch/x86/kernel/fpu/core.c
@@ -240,15 +240,12 @@ static void fpu_copy(struct fpu *dst_fpu, struct fpu *src_fpu)
        }
 }
 
-int fpu__copy(struct task_struct *dst, struct task_struct *src)
+int fpu__copy(struct fpu *dst_fpu, struct fpu *src_fpu)
 {
-       struct fpu *dst_fpu = &dst->thread.fpu;
-       struct fpu *src_fpu = &src->thread.fpu;
-
-       dst->thread.fpu.counter = 0;
-       dst->thread.fpu.has_fpu = 0;
-       dst->thread.fpu.state = NULL;
-       dst->thread.fpu.last_cpu = -1;
+       dst_fpu->counter = 0;
+       dst_fpu->has_fpu = 0;
+       dst_fpu->state = NULL;
+       dst_fpu->last_cpu = -1;
 
        if (src_fpu->fpstate_active) {
                int err = fpstate_alloc(dst_fpu);

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 50d503a2d8c39e3b5afb2bd57ec00a3153107502..e97266b18ad33c9eb962733f6b80eb5a38c72720 100644 (file)
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -83,7 +83,7 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
 {
        *dst = *src;
 
-       return fpu__copy(dst, src);
+       return fpu__copy(&dst->thread.fpu, &src->thread.fpu);
 }
 
 void arch_release_task_struct(struct task_struct *tsk)