[PATCH] kmemleak: Do not enable KMEMCHECK_PARTIAL_OK if DEBUG_KMEMLEAK

[Catalin Marinas <catalin.marinas@arm.com>]

This is a fix for bug #14845 (bugzilla.kernel.org). The
update_checksum() function in mm/kmemleak.c calls
kmemcheck_is_obj_initialised() before scanning an object. When
KMEMCHECK_PARTIAL_OK is enabled, this function returns true. However,
the crc32_le() reads smaller intervals (32-bit) for which
kmemleak_is_obj_initialised() is may be false leading to a kmemcheck
warning.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Christian Casteyde <casteyde.christian@free.fr>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
---
 lib/Kconfig.kmemcheck |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/lib/Kconfig.kmemcheck b/lib/Kconfig.kmemcheck
index 846e039..80660e9 100644
--- a/lib/Kconfig.kmemcheck
+++ b/lib/Kconfig.kmemcheck
@@ -75,7 +75,7 @@ config KMEMCHECK_SHADOW_COPY_SHIFT
 config KMEMCHECK_PARTIAL_OK
 	bool "kmemcheck: allow partially uninitialized memory"
 	depends on KMEMCHECK
-	default y
+	default y if !DEBUG_KMEMLEAK
 	help
 	  This option works around certain GCC optimizations that produce
 	  32-bit reads from 16-bit variables where the upper 16 bits are