diff options
Diffstat (limited to 'arch/arm/vfp/vfpmodule.c')
| -rw-r--r-- | arch/arm/vfp/vfpmodule.c | 24 |
1 files changed, 8 insertions, 16 deletions
diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c index bc683b8219b..b0197b2c857 100644 --- a/arch/arm/vfp/vfpmodule.c +++ b/arch/arm/vfp/vfpmodule.c @@ -11,6 +11,7 @@ #include <linux/types.h> #include <linux/cpu.h> #include <linux/cpu_pm.h> +#include <linux/hardirq.h> #include <linux/kernel.h> #include <linux/notifier.h> #include <linux/signal.h> @@ -432,7 +433,10 @@ void VFP_bounce(u32 trigger, u32 fpexc, struct pt_regs *regs) static void vfp_enable(void *unused) { - u32 access = get_copro_access(); + u32 access; + + BUG_ON(preemptible()); + access = get_copro_access(); /* * Enable full access to VFP (cp10 and cp11) @@ -573,12 +577,6 @@ int vfp_preserve_user_clear_hwstate(struct user_vfp __user *ufp, * entry. */ hwstate->fpscr &= ~(FPSCR_LENGTH_MASK | FPSCR_STRIDE_MASK); - - /* - * Disable VFP in the hwstate so that we can detect if it gets - * used. - */ - hwstate->fpexc &= ~FPEXC_EN; return 0; } @@ -591,12 +589,8 @@ int vfp_restore_user_hwstate(struct user_vfp __user *ufp, unsigned long fpexc; int err = 0; - /* - * If VFP has been used, then disable it to avoid corrupting - * the new thread state. - */ - if (hwstate->fpexc & FPEXC_EN) - vfp_flush_hwstate(thread); + /* Disable VFP to avoid corrupting the new thread state. */ + vfp_flush_hwstate(thread); /* * Copy the floating point registers. There can be unused @@ -657,7 +651,7 @@ static int __init vfp_init(void) unsigned int cpu_arch = cpu_architecture(); if (cpu_arch >= CPU_ARCH_ARMv6) - vfp_enable(NULL); + on_each_cpu(vfp_enable, NULL, 1); /* * First check that there is a VFP that we can use. @@ -678,8 +672,6 @@ static int __init vfp_init(void) } else { hotcpu_notifier(vfp_hotplug, 0); - smp_call_function(vfp_enable, NULL, 1); - VFP_arch = (vfpsid & FPSID_ARCH_MASK) >> FPSID_ARCH_BIT; /* Extract the architecture version */ printk("implementor %02x architecture %d part %02x variant %x rev %x\n", (vfpsid & FPSID_IMPLEMENTER_MASK) >> FPSID_IMPLEMENTER_BIT, |