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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-08 04:09:28 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-08 04:09:28 +0300 |
| commit | 35a738fb5fd0fdd1cc7e749e3a45f1876ecd1db8 (patch) | |
| tree | 521ca17847cda293b4a67d95fb6298b78bae75a2 /arch/x86/kernel/traps.c | |
| parent | bcd49c3dd172c38e14faf151adca63c8db4c9557 (diff) | |
| parent | 2f7726f955572e587d5f50fbe9b2deed5334bd90 (diff) | |
| download | linux-35a738fb5fd0fdd1cc7e749e3a45f1876ecd1db8.tar.xz | |
Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fpu updates from Ingo Molnar:
"Three changes:
- preparatory patch for AVX state tracking that computing-cluster
folks would like to use for user-space batching - but we are not
happy about the related ABI yet so this is only the kernel tracking
side
- a cleanup for CR0 handling in do_device_not_available()
- plus we removed a workaround for an ancient binutils version"
* 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/fpu: Track AVX-512 usage of tasks
x86/fpu: Get rid of CONFIG_AS_FXSAVEQ
x86/traps: Have read_cr0() only once in the #NM handler
Diffstat (limited to 'arch/x86/kernel/traps.c')
| -rw-r--r-- | arch/x86/kernel/traps.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index e289ce1332ab..d26f9e9c3d83 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -881,12 +881,12 @@ do_spurious_interrupt_bug(struct pt_regs *regs, long error_code) dotraplinkage void do_device_not_available(struct pt_regs *regs, long error_code) { - unsigned long cr0; + unsigned long cr0 = read_cr0(); RCU_LOCKDEP_WARN(!rcu_is_watching(), "entry code didn't wake RCU"); #ifdef CONFIG_MATH_EMULATION - if (!boot_cpu_has(X86_FEATURE_FPU) && (read_cr0() & X86_CR0_EM)) { + if (!boot_cpu_has(X86_FEATURE_FPU) && (cr0 & X86_CR0_EM)) { struct math_emu_info info = { }; cond_local_irq_enable(regs); @@ -898,7 +898,6 @@ do_device_not_available(struct pt_regs *regs, long error_code) #endif /* This should not happen. */ - cr0 = read_cr0(); if (WARN(cr0 & X86_CR0_TS, "CR0.TS was set")) { /* Try to fix it up and carry on. */ write_cr0(cr0 & ~X86_CR0_TS); |