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powerpc: Use task_stack_page() in current_pt_regs() 

Change current_pt_regs() to use task_stack_page() rather than
current_thread_info() so that it keeps working once we enable
THREAD_INFO_IN_TASK.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[mpe: Split out of large patch]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2019-01-18 18:40:34 +11:00 committed by Michael Ellerman
parent 3733304048
commit b72cc2e7ae
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/include/asm/ptrace.h
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@ -157,7 +157,7 @@ extern int ptrace_put_reg(struct task_struct *task, int regno,
unsigned long data);
#define current_pt_regs() \
((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
((struct pt_regs *)((unsigned long)task_stack_page(current) + THREAD_SIZE) - 1)
/*
* We use the least-significant bit of the trap field to indicate
* whether we have saved the full set of registers, or only a