diff mbox series

[v16,14/21] powerpc: Use task_stack_page() in current_pt_regs()

Message ID 20190205113219.17903-15-mpe@ellerman.id.au (mailing list archive)
State Accepted
Headers show
Series powerpc: Switch to CONFIG_THREAD_INFO_IN_TASK | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch warning next/apply_patch Patch failed to apply
snowpatch_ozlabs/apply_patch fail Failed to apply to any branch

Commit Message

Michael Ellerman Feb. 5, 2019, 11:32 a.m. UTC 
From: Christophe Leroy <christophe.leroy@c-s.fr>

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>
---
 arch/powerpc/include/asm/ptrace.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Nicholas Piggin Feb. 7, 2019, 4:13 a.m. UTC | #1 
Michael Ellerman's on February 5, 2019 9:32 pm:
> From: Christophe Leroy <christophe.leroy@c-s.fr>
> 
> 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>

Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
diff mbox series

Patch

diff --git a/arch/powerpc/include/asm/ptrace.h b/arch/powerpc/include/asm/ptrace.h
index 0b8a735b6d85..64271e562fed 100644
--- a/arch/powerpc/include/asm/ptrace.h
+++ b/arch/powerpc/include/asm/ptrace.h
@@ -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