Commit-ID: ed97b085461ca6bdc22162b68b4cba69459ce1c8
Gitweb: http://git.kernel.org/tip/ed97b085461ca6bdc22162b68b4cba69459ce1c8
Author: Ingo Molnar <mingo@xxxxxxxxxx>
AuthorDate: Fri, 3 Apr 2015 12:41:14 +0200
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Tue, 19 May 2015 15:47:13 +0200
x86/fpu: Rename fpu_alloc() to fpstate_alloc()
Use the fpu__*() namespace for fpstate_alloc() as well.
Also add a comment about FPU state alignment.
Reviewed-by: Borislav Petkov <bp@xxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/x86/include/asm/fpu-internal.h | 2 +-
arch/x86/kernel/i387.c | 12 ++++++++----
arch/x86/kernel/process.c | 2 +-
arch/x86/kvm/x86.c | 2 +-
4 files changed, 11 insertions(+), 7 deletions(-)
diff --git a/arch/x86/include/asm/fpu-internal.h b/arch/x86/include/asm/fpu-internal.h
index bdbba1a..88f584a 100644
--- a/arch/x86/include/asm/fpu-internal.h
+++ b/arch/x86/include/asm/fpu-internal.h
@@ -569,7 +569,7 @@ static inline unsigned short get_fpu_mxcsr(struct task_struct *tsk)
}
}
-extern int fpu_alloc(struct fpu *fpu);
+extern int fpstate_alloc(struct fpu *fpu);
static inline void fpu_free(struct fpu *fpu)
{
diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c
index 05fcc90..5f2feb6 100644
--- a/arch/x86/kernel/i387.c
+++ b/arch/x86/kernel/i387.c
@@ -246,17 +246,21 @@ void fpu_finit(struct fpu *fpu)
}
EXPORT_SYMBOL_GPL(fpu_finit);
-int fpu_alloc(struct fpu *fpu)
+int fpstate_alloc(struct fpu *fpu)
{
if (fpu->state)
return 0;
+
fpu->state = kmem_cache_alloc(task_xstate_cachep, GFP_KERNEL);
if (!fpu->state)
return -ENOMEM;
+
+ /* The CPU requires the FPU state to be aligned to 16 byte boundaries: */
WARN_ON((unsigned long)fpu->state & 15);
+
return 0;
}
-EXPORT_SYMBOL_GPL(fpu_alloc);
+EXPORT_SYMBOL_GPL(fpstate_alloc);
/*
* Allocate the backing store for the current task's FPU registers
@@ -276,7 +280,7 @@ int fpstate_alloc_init(struct task_struct *curr)
/*
* Memory allocation at the first usage of the FPU and other state.
*/
- ret = fpu_alloc(&curr->thread.fpu);
+ ret = fpstate_alloc(&curr->thread.fpu);
if (ret)
return ret;
@@ -310,7 +314,7 @@ static int fpu__unlazy_stopped(struct task_struct *child)
/*
* Memory allocation at the first usage of the FPU and other state.
*/
- ret = fpu_alloc(&child->thread.fpu);
+ ret = fpstate_alloc(&child->thread.fpu);
if (ret)
return ret;
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index abdb81d..a0ed7c0 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -92,7 +92,7 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
dst->thread.fpu.state = NULL;
task_disable_lazy_fpu_restore(dst);
if (tsk_used_math(src)) {
- int err = fpu_alloc(&dst->thread.fpu);
+ int err = fpstate_alloc(&dst->thread.fpu);
if (err)
return err;
fpu_copy(dst, src);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index bfc3966..28fa733 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7007,7 +7007,7 @@ int fx_init(struct kvm_vcpu *vcpu)
{
int err;
- err = fpu_alloc(&vcpu->arch.guest_fpu);
+ err = fpstate_alloc(&vcpu->arch.guest_fpu);
if (err)
return err;
--
To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
|