diff options
Diffstat (limited to 'arch/arm/vfp')
| -rw-r--r-- | arch/arm/vfp/entry.S | 4 | ||||
| -rw-r--r-- | arch/arm/vfp/vfphw.S | 4 | ||||
| -rw-r--r-- | arch/arm/vfp/vfpmodule.c | 19 |
3 files changed, 16 insertions, 11 deletions
diff --git a/arch/arm/vfp/entry.S b/arch/arm/vfp/entry.S index 27b0a1f27fbd..9a89264cdcc0 100644 --- a/arch/arm/vfp/entry.S +++ b/arch/arm/vfp/entry.S @@ -22,7 +22,7 @@ @ IRQs enabled. @ ENTRY(do_vfp) - inc_preempt_count r10, r4 + local_bh_disable r10, r4 ldr r4, .LCvfp ldr r11, [r10, #TI_CPU] @ CPU number add r10, r10, #TI_VFPSTATE @ r10 = workspace @@ -30,7 +30,7 @@ ENTRY(do_vfp) ENDPROC(do_vfp) ENTRY(vfp_null_entry) - dec_preempt_count_ti r10, r4 + local_bh_enable_ti r10, r4 ret lr ENDPROC(vfp_null_entry) diff --git a/arch/arm/vfp/vfphw.S b/arch/arm/vfp/vfphw.S index 6f7926c9c179..26c4f61ecfa3 100644 --- a/arch/arm/vfp/vfphw.S +++ b/arch/arm/vfp/vfphw.S @@ -175,7 +175,7 @@ vfp_hw_state_valid: @ else it's one 32-bit instruction, so @ always subtract 4 from the following @ instruction address. - dec_preempt_count_ti r10, r4 + local_bh_enable_ti r10, r4 ret r9 @ we think we have handled things @@ -200,7 +200,7 @@ skip: @ not recognised by VFP DBGSTR "not VFP" - dec_preempt_count_ti r10, r4 + local_bh_enable_ti r10, r4 ret lr process_exception: diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c index 281110423871..01bc48d73847 100644 --- a/arch/arm/vfp/vfpmodule.c +++ b/arch/arm/vfp/vfpmodule.c @@ -416,7 +416,7 @@ void VFP_bounce(u32 trigger, u32 fpexc, struct pt_regs *regs) if (exceptions) vfp_raise_exceptions(exceptions, trigger, orig_fpscr, regs); exit: - preempt_enable(); + local_bh_enable(); } static void vfp_enable(void *unused) @@ -517,6 +517,8 @@ void vfp_sync_hwstate(struct thread_info *thread) { unsigned int cpu = get_cpu(); + local_bh_disable(); + if (vfp_state_in_hw(cpu, thread)) { u32 fpexc = fmrx(FPEXC); @@ -528,6 +530,7 @@ void vfp_sync_hwstate(struct thread_info *thread) fmxr(FPEXC, fpexc); } + local_bh_enable(); put_cpu(); } @@ -717,13 +720,15 @@ void kernel_neon_begin(void) unsigned int cpu; u32 fpexc; + local_bh_disable(); + /* - * Kernel mode NEON is only allowed outside of interrupt context - * with preemption disabled. This will make sure that the kernel - * mode NEON register contents never need to be preserved. + * Kernel mode NEON is only allowed outside of hardirq context with + * preemption and softirq processing disabled. This will make sure that + * the kernel mode NEON register contents never need to be preserved. */ - BUG_ON(in_interrupt()); - cpu = get_cpu(); + BUG_ON(in_hardirq()); + cpu = __smp_processor_id(); fpexc = fmrx(FPEXC) | FPEXC_EN; fmxr(FPEXC, fpexc); @@ -746,7 +751,7 @@ void kernel_neon_end(void) { /* Disable the NEON/VFP unit. */ fmxr(FPEXC, fmrx(FPEXC) & ~FPEXC_EN); - put_cpu(); + local_bh_enable(); } EXPORT_SYMBOL(kernel_neon_end); |