From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 10 Apr 2019 10:28:06 +0000 (+0200)
Subject: mm/page_owner: Remove the ULONG_MAX stack trace hackery
X-Git-Tag: v5.15~6507^2~33
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4621c9858f05ab08434221e3a15cc8098645ef2a;p=platform%2Fkernel%2Flinux-starfive.git

mm/page_owner: Remove the ULONG_MAX stack trace hackery

No architecture terminates the stack trace with ULONG_MAX anymore. Remove
the cruft.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Alexander Potapenko <glider@google.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: linux-mm@kvack.org
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: https://lkml.kernel.org/r/20190410103644.661974663@linutronix.de
---

diff --git a/mm/page_owner.c b/mm/page_owner.c
index 925b6f4..df277e6 100644
--- a/mm/page_owner.c
+++ b/mm/page_owner.c
@@ -148,9 +148,6 @@ static noinline depot_stack_handle_t save_stack(gfp_t flags)
 	depot_stack_handle_t handle;
 
 	save_stack_trace(&trace);
-	if (trace.nr_entries != 0 &&
-	    trace.entries[trace.nr_entries-1] == ULONG_MAX)
-		trace.nr_entries--;
 
 	/*
 	 * We need to check recursion here because our request to stackdepot