From: Andrew Morton Those 1500 warnings can be a bit of a pain. Add a config option to shut them up. Temporary! Not for merging. Cc: Greg KH Signed-off-by: Andrew Morton --- include/linux/compiler.h | 5 +++++ lib/Kconfig.debug | 7 +++++++ 2 files changed, 12 insertions(+) diff -puN include/linux/compiler.h~add-config_enable_must_check include/linux/compiler.h --- a/include/linux/compiler.h~add-config_enable_must_check +++ a/include/linux/compiler.h @@ -99,6 +99,11 @@ extern void __chk_io_ptr(void __iomem *) #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 -puN lib/Kconfig.debug~add-config_enable_must_check lib/Kconfig.debug --- a/lib/Kconfig.debug~add-config_enable_must_check +++ a/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" _