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authorIngo Molnar <mingo@kernel.org>2015-04-26 17:56:05 +0300
committerIngo Molnar <mingo@kernel.org>2015-05-19 16:47:48 +0300
commit952f07ecbd4d9bac77c003ba136f8ee8ce631591 (patch)
tree83d3abaa36140b5f9765796b9a6bc1b34066bbac /arch/x86
parentd63e79b114c0208bc2b7712c879568e180909d60 (diff)
downloadlinux-952f07ecbd4d9bac77c003ba136f8ee8ce631591.tar.xz
x86/fpu: Move various internal function prototypes to fpu/internal.h
There are a number of FPU internal function prototypes and an inline function in fpu/api.h, mostly placed so historically as the code grew over the years. Move them over into fpu/internal.h where they belong. (Add sched.h include to stackprotector.h which incorrectly relied on getting it from fpu/api.h.) fpu/api.h is now a pure file that only contains FPU APIs intended for driver use. 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')
-rw-r--r--arch/x86/include/asm/fpu/api.h31
-rw-r--r--arch/x86/include/asm/fpu/internal.h25
-rw-r--r--arch/x86/include/asm/stackprotector.h2
-rw-r--r--arch/x86/kernel/cpu/bugs.c2
-rw-r--r--arch/x86/kvm/vmx.c2
-rw-r--r--arch/x86/math-emu/fpu_entry.c2
-rw-r--r--arch/x86/power/cpu.c1
7 files changed, 32 insertions, 33 deletions
diff --git a/arch/x86/include/asm/fpu/api.h b/arch/x86/include/asm/fpu/api.h
index d4ab9e3af234..0c713455fc63 100644
--- a/arch/x86/include/asm/fpu/api.h
+++ b/arch/x86/include/asm/fpu/api.h
@@ -10,23 +10,8 @@
#ifndef _ASM_X86_FPU_API_H
#define _ASM_X86_FPU_API_H
-#include <linux/sched.h>
#include <linux/hardirq.h>
-struct pt_regs;
-struct user_i387_struct;
-
-extern int fpstate_alloc_init(struct fpu *fpu);
-extern void fpstate_init(struct fpu *fpu);
-extern void fpu__clear(struct task_struct *tsk);
-
-extern int dump_fpu(struct pt_regs *, struct user_i387_struct *);
-extern void fpu__restore(void);
-extern void fpu__init_check_bugs(void);
-extern void fpu__resume_cpu(void);
-
-extern bool irq_fpu_usable(void);
-
/*
* Careful: __kernel_fpu_begin/end() must be called with preempt disabled
* and they don't touch the preempt state on their own.
@@ -41,6 +26,7 @@ extern void __kernel_fpu_begin(void);
extern void __kernel_fpu_end(void);
extern void kernel_fpu_begin(void);
extern void kernel_fpu_end(void);
+extern bool irq_fpu_usable(void);
/*
* Some instructions like VIA's padlock instructions generate a spurious
@@ -73,19 +59,4 @@ static inline void irq_ts_restore(int TS_state)
stts();
}
-/*
- * The question "does this thread have fpu access?"
- * is slightly racy, since preemption could come in
- * and revoke it immediately after the test.
- *
- * However, even in that very unlikely scenario,
- * we can just assume we have FPU access - typically
- * to save the FP state - we'll just take a #NM
- * fault and get the FPU access back.
- */
-static inline int user_has_fpu(void)
-{
- return current->thread.fpu.fpregs_active;
-}
-
#endif /* _ASM_X86_FPU_API_H */
diff --git a/arch/x86/include/asm/fpu/internal.h b/arch/x86/include/asm/fpu/internal.h
index 0c8c812d23b4..89c6ec80c1ac 100644
--- a/arch/x86/include/asm/fpu/internal.h
+++ b/arch/x86/include/asm/fpu/internal.h
@@ -12,6 +12,7 @@
#include <linux/regset.h>
#include <linux/compat.h>
+#include <linux/sched.h>
#include <linux/slab.h>
#include <asm/user.h>
@@ -43,6 +44,15 @@ extern void fpu__init_system_xstate(void);
extern void fpu__init_cpu_xstate(void);
extern void fpu__init_system(struct cpuinfo_x86 *c);
+extern int fpstate_alloc_init(struct fpu *fpu);
+extern void fpstate_init(struct fpu *fpu);
+extern void fpu__clear(struct task_struct *tsk);
+
+extern int dump_fpu(struct pt_regs *, struct user_i387_struct *);
+extern void fpu__restore(void);
+extern void fpu__init_check_bugs(void);
+extern void fpu__resume_cpu(void);
+
DECLARE_PER_CPU(struct fpu *, fpu_fpregs_owner_ctx);
extern void convert_from_fxsr(struct user_i387_ia32_struct *env,
@@ -335,6 +345,21 @@ static inline void __fpregs_activate(struct fpu *fpu)
}
/*
+ * The question "does this thread have fpu access?"
+ * is slightly racy, since preemption could come in
+ * and revoke it immediately after the test.
+ *
+ * However, even in that very unlikely scenario,
+ * we can just assume we have FPU access - typically
+ * to save the FP state - we'll just take a #NM
+ * fault and get the FPU access back.
+ */
+static inline int user_has_fpu(void)
+{
+ return current->thread.fpu.fpregs_active;
+}
+
+/*
* Encapsulate the CR0.TS handling together with the
* software flag.
*
diff --git a/arch/x86/include/asm/stackprotector.h b/arch/x86/include/asm/stackprotector.h
index 6a998598f172..c2e00bb2a136 100644
--- a/arch/x86/include/asm/stackprotector.h
+++ b/arch/x86/include/asm/stackprotector.h
@@ -39,7 +39,9 @@
#include <asm/processor.h>
#include <asm/percpu.h>
#include <asm/desc.h>
+
#include <linux/random.h>
+#include <linux/sched.h>
/*
* 24 byte read-only segment initializer for stack canary. Linker
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 29dd74318ec6..bd17db15a2c1 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -12,7 +12,7 @@
#include <asm/bugs.h>
#include <asm/processor.h>
#include <asm/processor-flags.h>
-#include <asm/fpu/api.h>
+#include <asm/fpu/internal.h>
#include <asm/msr.h>
#include <asm/paravirt.h>
#include <asm/alternative.h>
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 5cb738a18ca3..f93ae71416e4 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -40,7 +40,7 @@
#include <asm/vmx.h>
#include <asm/virtext.h>
#include <asm/mce.h>
-#include <asm/fpu/api.h>
+#include <asm/fpu/internal.h>
#include <asm/xcr.h>
#include <asm/perf_event.h>
#include <asm/debugreg.h>
diff --git a/arch/x86/math-emu/fpu_entry.c b/arch/x86/math-emu/fpu_entry.c
index 3bb4c6a24ea5..cf843855e4f6 100644
--- a/arch/x86/math-emu/fpu_entry.c
+++ b/arch/x86/math-emu/fpu_entry.c
@@ -31,7 +31,7 @@
#include <asm/traps.h>
#include <asm/desc.h>
#include <asm/user.h>
-#include <asm/fpu/api.h>
+#include <asm/fpu/internal.h>
#include "fpu_system.h"
#include "fpu_emu.h"
diff --git a/arch/x86/power/cpu.c b/arch/x86/power/cpu.c
index ad0ce6b70fac..0d7dd1f5ac36 100644
--- a/arch/x86/power/cpu.c
+++ b/arch/x86/power/cpu.c
@@ -19,6 +19,7 @@
#include <asm/page.h>
#include <asm/mce.h>
#include <asm/suspend.h>
+#include <asm/fpu/internal.h>
#include <asm/debugreg.h>
#include <asm/cpu.h>