From 656ff9bef08c19a6471b49528dacb4cbbeb1e537 Mon Sep 17 00:00:00 2001 From: Alex Smith Date: Wed, 23 Jul 2014 14:40:06 +0100 Subject: MIPS: ptrace: Avoid smp_processor_id() when retrieving FPU IR Whenever ptrace attempts to retrieve the FPU implementation register it accesses it through current_cpu_data, which calls smp_processor_id(). Since the code may execute with preemption enabled, this can trigger a warning. Fix this by using boot_cpu_data to get the IR instead. Signed-off-by: Alex Smith Cc: # v3.15+ Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7449/ Signed-off-by: Ralf Baechle --- arch/mips/kernel/ptrace32.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/mips/kernel/ptrace32.c') diff --git a/arch/mips/kernel/ptrace32.c b/arch/mips/kernel/ptrace32.c index b40c3ca..a83fb73 100644 --- a/arch/mips/kernel/ptrace32.c +++ b/arch/mips/kernel/ptrace32.c @@ -129,7 +129,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request, break; case FPC_EIR: /* implementation / version register */ - tmp = current_cpu_data.fpu_id; + tmp = boot_cpu_data.fpu_id; break; case DSP_BASE ... DSP_BASE + 5: { dspreg_t *dregs; -- cgit v1.1