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authorIngo Molnar <mingo@kernel.org>2017-09-23 15:59:58 +0300
committerIngo Molnar <mingo@kernel.org>2017-09-24 14:04:33 +0300
commitb3a163081c28d1a4d1ad76259a9d93b34a82f1da (patch)
tree53d284cba5ab8670bf2889cd42d1f0887e27ccf9 /arch/x86/kernel/fpu
parent6d7f7da5533a3f841eeb1d9657257c9367924274 (diff)
downloadlinux-b3a163081c28d1a4d1ad76259a9d93b34a82f1da.tar.xz
x86/fpu: Simplify fpu->fpregs_active use
The fpregs_active() inline function is pretty pointless - in almost all the callsites it can be replaced with a direct fpu->fpregs_active access. Do so and eliminate the extra layer of obfuscation. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Eric Biggers <ebiggers3@gmail.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Yu-cheng Yu <yu-cheng.yu@intel.com> Link: http://lkml.kernel.org/r/20170923130016.21448-16-mingo@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/fpu')
-rw-r--r--arch/x86/kernel/fpu/core.c2
-rw-r--r--arch/x86/kernel/fpu/signal.c9
2 files changed, 6 insertions, 5 deletions
diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c
index e1114f070c2d..bad57248e5a0 100644
--- a/arch/x86/kernel/fpu/core.c
+++ b/arch/x86/kernel/fpu/core.c
@@ -367,7 +367,7 @@ void fpu__current_fpstate_write_end(void)
* registers may still be out of date. Update them with
* an XRSTOR if they are active.
*/
- if (fpregs_active())
+ if (fpu->fpregs_active)
copy_kernel_to_fpregs(&fpu->state);
/*
diff --git a/arch/x86/kernel/fpu/signal.c b/arch/x86/kernel/fpu/signal.c
index 2d682dac35d4..684025654d0c 100644
--- a/arch/x86/kernel/fpu/signal.c
+++ b/arch/x86/kernel/fpu/signal.c
@@ -155,7 +155,8 @@ static inline int copy_fpregs_to_sigframe(struct xregs_state __user *buf)
*/
int copy_fpstate_to_sigframe(void __user *buf, void __user *buf_fx, int size)
{
- struct xregs_state *xsave = &current->thread.fpu.state.xsave;
+ struct fpu *fpu = &current->thread.fpu;
+ struct xregs_state *xsave = &fpu->state.xsave;
struct task_struct *tsk = current;
int ia32_fxstate = (buf != buf_fx);
@@ -170,13 +171,13 @@ int copy_fpstate_to_sigframe(void __user *buf, void __user *buf_fx, int size)
sizeof(struct user_i387_ia32_struct), NULL,
(struct _fpstate_32 __user *) buf) ? -1 : 1;
- if (fpregs_active() || using_compacted_format()) {
+ if (fpu->fpregs_active || using_compacted_format()) {
/* Save the live register state to the user directly. */
if (copy_fpregs_to_sigframe(buf_fx))
return -1;
/* Update the thread's fxstate to save the fsave header. */
if (ia32_fxstate)
- copy_fxregs_to_kernel(&tsk->thread.fpu);
+ copy_fxregs_to_kernel(fpu);
} else {
/*
* It is a *bug* if kernel uses compacted-format for xsave
@@ -189,7 +190,7 @@ int copy_fpstate_to_sigframe(void __user *buf, void __user *buf_fx, int size)
return -1;
}
- fpstate_sanitize_xstate(&tsk->thread.fpu);
+ fpstate_sanitize_xstate(fpu);
if (__copy_to_user(buf_fx, xsave, fpu_user_xstate_size))
return -1;
}