[3.16-stable,77/87] ARM: 8160/1: drop warning about return_address not using unwind tables

Message ID 20170505194745.3627137-78-arnd@arndb.de
State New
Headers show
Series
  • build warnings and errors
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Commit Message

Arnd Bergmann May 5, 2017, 7:47 p.m.
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>


Commit e16343c47e4276f5ebc77ca16feb5e50ca1918f9 upstream.

The warning was introduced in 2009 (commit 4bf1fa5a34aa ([ARM] 5613/1:
implement CALLER_ADDRESSx)). The only "problem" here is that
CALLER_ADDRESSx for x > 1 returns NULL which doesn't do much harm.

The drawback of implementing a fix (i.e. use unwind tables to implement CALLER_ADDRESSx) is that much of the unwinder code would need to be marked as not
traceable.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

---
 arch/arm/kernel/return_address.c | 4 ----
 1 file changed, 4 deletions(-)

-- 
2.9.0

Patch

diff --git a/arch/arm/kernel/return_address.c b/arch/arm/kernel/return_address.c
index fafedd86885d..827d946d2be4 100644
--- a/arch/arm/kernel/return_address.c
+++ b/arch/arm/kernel/return_address.c
@@ -59,10 +59,6 @@  void *return_address(unsigned int level)
 
 #else /* if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND) */
 
-#if defined(CONFIG_ARM_UNWIND)
-#warning "TODO: return_address should use unwind tables"
-#endif
-
 void *return_address(unsigned int level)
 {
 	return NULL;