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[v13,01/11] arm64: Remove NULL task check from unwind_frame()

Message ID 20220117145608.6781-2-madvenka@linux.microsoft.com (mailing list archive)
State New, archived
Headers show
Series arm64: Reorganize the unwinder and implement stack trace reliability checks | expand

Commit Message

Madhavan T. Venkataraman Jan. 17, 2022, 2:55 p.m. UTC 
From: "Madhavan T. Venkataraman" <madvenka@linux.microsoft.com>

Currently, there is a check for a NULL task in unwind_frame(). It is not
needed since all current consumers pass a non-NULL task.

Signed-off-by: Madhavan T. Venkataraman <madvenka@linux.microsoft.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
---
 arch/arm64/kernel/stacktrace.c | 3 ---
 1 file changed, 3 deletions(-)
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Patch

diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c
index 0fb58fed54cb..5f5bb35b7b41 100644
--- a/arch/arm64/kernel/stacktrace.c
+++ b/arch/arm64/kernel/stacktrace.c
@@ -69,9 +69,6 @@  static int notrace unwind_frame(struct task_struct *tsk,
 	unsigned long fp = frame->fp;
 	struct stack_info info;
 
-	if (!tsk)
-		tsk = current;
-
 	/* Final frame; nothing to unwind */
 	if (fp == (unsigned long)task_pt_regs(tsk)->stackframe)
 		return -ENOENT;