[PATCH 38/47] add CONFIG_ENABLE_MUST_CHECK

Greg KH
2006-09-26T05:46:51Z

From: Andrew Morton <akpm@osdl.org>

Those 1500 warnings can be a bit of a pain. Add a config option to shut them
up.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
include/linux/compiler.h | 5 +++++
lib/Kconfig.debug | 7 +++++++
2 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 9b4f110..060b961 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -99,6 +99,11 @@ #ifndef __must_check
#define __must_check
#endif

+#ifndef CONFIG_ENABLE_MUST_CHECK
+#undef __must_check
+#define __must_check
+#endif
+
/*
* Allow us to avoid 'defined but not used' warnings on functions and data,
* as well as force them to be emitted to the assembly file.
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 554ee68..5c114c3 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -8,6 +8,13 @@ config PRINTK_TIME
operations. This is useful for identifying long delays
in kernel startup.

+config ENABLE_MUST_CHECK
+ bool "Enable __must_check logic"
+ default y
+ help
+ Enable the __must_check logic in the kernel build. Disable this to
+ suppress the "warning: ignoring return value of 'foo', declared with
+ attribute warn_unused_result" messages.

config MAGIC_SYSRQ
bool "Magic SysRq key"
--
1.4.2.1