diff options
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/process.c | 6 | ||||
| -rw-r--r-- | arch/powerpc/kernel/ptrace.c | 10 |
2 files changed, 14 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 7c8e3da23810..8d506d86e2df 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -353,6 +353,12 @@ struct task_struct *__switch_to(struct task_struct *prev, account_process_vtime(current); calculate_steal_time(); + /* + * We can't take a PMU exception inside _switch() since there is a + * window where the kernel stack SLB and the kernel stack are out + * of sync. Hard disable here. + */ + hard_irq_disable(); last = _switch(old_thread, new_thread); local_irq_restore(flags); diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c index 7673e9865733..2a9fe97e4521 100644 --- a/arch/powerpc/kernel/ptrace.c +++ b/arch/powerpc/kernel/ptrace.c @@ -530,15 +530,21 @@ static int gpr32_set(struct task_struct *target, --count; } - if (kbuf) + if (kbuf) { for (; count > 0 && pos <= PT_MAX_PUT_REG; --count) regs[pos++] = *k++; - else + for (; count > 0 && pos < PT_TRAP; --count, ++pos) + ++k; + } else { for (; count > 0 && pos <= PT_MAX_PUT_REG; --count) { if (__get_user(reg, u++)) return -EFAULT; regs[pos++] = reg; } + for (; count > 0 && pos < PT_TRAP; --count, ++pos) + if (__get_user(reg, u++)) + return -EFAULT; + } if (count > 0 && pos == PT_TRAP) { if (kbuf) |
