On Wed, 26 Aug 2015, Joe Perches wrote:
> vdbg_printk when not using CONFIG_THINKPAD_ACPI_DEBUG uses
> no_printk which produces no logging output but always
> evaluates arguments.
>
> Change the macro to surround the no_printk call with
> do { if (0) no_printk(...); } while (0)
> to avoid the unnecessary argument evaluations.
>
> $ size drivers/platform/x86/thinkpad_acpi.o*
> text data bss dec hex filename
> 60918 6184 824 67926 10956 drivers/platform/x86/thinkpad_acpi.o.new
> 60927 6184 824 67935 1095f drivers/platform/x86/thinkpad_acpi.o.old
>
> Signed-off-by: Joe Perches <joe@xxxxxxxxxxx>
Acked-by: Henrique de Moraes Holschuh <hmh@xxxxxxxxxx>
> ---
> drivers/platform/x86/thinkpad_acpi.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
> index 33e488c..131dd74 100644
> --- a/drivers/platform/x86/thinkpad_acpi.c
> +++ b/drivers/platform/x86/thinkpad_acpi.c
> @@ -402,7 +402,7 @@ static const char *str_supported(int is_supported);
> #else
> static inline const char *str_supported(int is_supported) { return ""; }
> #define vdbg_printk(a_dbg_level, format, arg...) \
> - no_printk(format, ##arg)
> + do { if (0) no_printk(format, ##arg); } while (0)
> #endif
>
> static void tpacpi_log_usertask(const char * const what)
>
--
"One disk to rule them all, One disk to find them. One disk to bring
them all and in the darkness grind them. In the Land of Redmond
where the shadows lie." -- The Silicon Valley Tarot
Henrique Holschuh
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