linux-kernel - [tip:core/stacktrace] unicore32/stacktrace: Remove the pointless ULONG

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Message-ID: <tip-f8a9a269c28ddd5d741e747ceca753af01c828f2@git.kernel.org>
Date:   Sun, 14 Apr 2019 13:36:51 -0700
From:   tip-bot for Thomas Gleixner <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     glider@...gle.com, jpoimboe@...hat.com, luto@...nel.org,
        tglx@...utronix.de, hpa@...or.com, linux-kernel@...r.kernel.org,
        rostedt@...dmis.org, mingo@...nel.org, peterz@...radead.org,
        gxt@....edu.cn
Subject: [tip:core/stacktrace] unicore32/stacktrace: Remove the pointless
 ULONG_MAX marker

Commit-ID:  f8a9a269c28ddd5d741e747ceca753af01c828f2
Gitweb:     https://git.kernel.org/tip/f8a9a269c28ddd5d741e747ceca753af01c828f2
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Wed, 10 Apr 2019 12:27:59 +0200
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Sun, 14 Apr 2019 19:58:28 +0200

unicore32/stacktrace: Remove the pointless ULONG_MAX marker

Terminating the last trace entry with ULONG_MAX is a completely pointless
exercise and none of the consumers can rely on it because it's
inconsistently implemented across architectures. In fact quite some of the
callers remove the entry and adjust stack_trace.nr_entries afterwards.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Cc: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Alexander Potapenko <glider@...gle.com>
Cc: Guan Xuetao <gxt@....edu.cn>
Link: https://lkml.kernel.org/r/20190410103644.036077691@linutronix.de

---
 arch/unicore32/kernel/stacktrace.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/unicore32/kernel/stacktrace.c b/arch/unicore32/kernel/stacktrace.c
index 9976e767d51c..e37da8c6837b 100644
--- a/arch/unicore32/kernel/stacktrace.c
+++ b/arch/unicore32/kernel/stacktrace.c
@@ -120,8 +120,6 @@ void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
 	}
 
 	walk_stackframe(&frame, save_trace, &data);
-	if (trace->nr_entries < trace->max_entries)
-		trace->entries[trace->nr_entries++] = ULONG_MAX;
 }
 
 void save_stack_trace(struct stack_trace *trace)