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

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Message-ID: <tip-fa49e2eac9aa8259e1ea540d1bd301448d5b735d@git.kernel.org>
Date:   Sun, 14 Apr 2019 13:43:35 -0700
From:   tip-bot for Thomas Gleixner <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     rostedt@...dmis.org, linux-kernel@...r.kernel.org,
        peterz@...radead.org, joonas.lahtinen@...ux.intel.com,
        jani.nikula@...ux.intel.com, daniel@...ll.ch, tglx@...utronix.de,
        mingo@...nel.org, maarten.lankhorst@...ux.intel.com,
        jpoimboe@...hat.com, rodrigo.vivi@...el.com, glider@...gle.com,
        airlied@...ux.ie, luto@...nel.org, hpa@...or.com
Subject: [tip:core/stacktrace] drm: Remove the ULONG_MAX stack trace hackery

Commit-ID:  fa49e2eac9aa8259e1ea540d1bd301448d5b735d
Gitweb:     https://git.kernel.org/tip/fa49e2eac9aa8259e1ea540d1bd301448d5b735d
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Wed, 10 Apr 2019 12:28:09 +0200
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Sun, 14 Apr 2019 19:58:32 +0200

drm: 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@...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: intel-gfx@...ts.freedesktop.org
Cc: Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
Cc: dri-devel@...ts.freedesktop.org
Cc: David Airlie <airlied@...ux.ie>
Cc: Jani Nikula <jani.nikula@...ux.intel.com>
Cc: Daniel Vetter <daniel@...ll.ch>
Cc: Rodrigo Vivi <rodrigo.vivi@...el.com>
Link: https://lkml.kernel.org/r/20190410103644.945059666@linutronix.de

---
 drivers/gpu/drm/drm_mm.c                | 3 ---
 drivers/gpu/drm/i915/intel_runtime_pm.c | 4 ----
 2 files changed, 7 deletions(-)

diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c
index 2b4f373736c7..69552777e13a 100644
--- a/drivers/gpu/drm/drm_mm.c
+++ b/drivers/gpu/drm/drm_mm.c
@@ -113,9 +113,6 @@ static noinline void save_stack(struct drm_mm_node *node)
 	};
 
 	save_stack_trace(&trace);
-	if (trace.nr_entries != 0 &&
-	    trace.entries[trace.nr_entries-1] == ULONG_MAX)
-		trace.nr_entries--;
 
 	/* May be called under spinlock, so avoid sleeping */
 	node->stack = depot_save_stack(&trace, GFP_NOWAIT);
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index a017a4232c0f..1f8acbb332c9 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -67,10 +67,6 @@ static noinline depot_stack_handle_t __save_depot_stack(void)
 	};
 
 	save_stack_trace(&trace);
-	if (trace.nr_entries &&
-	    trace.entries[trace.nr_entries - 1] == ULONG_MAX)
-		trace.nr_entries--;
-
 	return depot_save_stack(&trace, GFP_NOWAIT | __GFP_NOWARN);
 }