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Commit eaa47704 authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: Use boot_cpu_data for FPU tests in sigcontext paths. 



We do not want to use smp_processor_id() from these paths, as they trip
preempt BUGs. Switch the test over to the boot cpu directly.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 99222622

arch/sh/kernel/signal_32.c

+3 −3
Original line number Diff line number Diff line
@@ -145,7 +145,7 @@ static inline int restore_sigcontext_fpu(struct sigcontext __user *sc) 
{

	struct task_struct *tsk = current;



	if (!(current_cpu_data.flags & CPU_HAS_FPU))

	if (!(boot_cpu_data.flags & CPU_HAS_FPU))

		return 0;



	set_used_math();
@@ -158,7 +158,7 @@ static inline int save_sigcontext_fpu(struct sigcontext __user *sc, 
{

	struct task_struct *tsk = current;



	if (!(current_cpu_data.flags & CPU_HAS_FPU))

	if (!(boot_cpu_data.flags & CPU_HAS_FPU))

		return 0;



	if (!used_math()) {
@@ -199,7 +199,7 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, int *r0_p 
#undef COPY



#ifdef CONFIG_SH_FPU

	if (current_cpu_data.flags & CPU_HAS_FPU) {

	if (boot_cpu_data.flags & CPU_HAS_FPU) {

		int owned_fp;

		struct task_struct *tsk = current;