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thinkpad_acpi: Remove side effects from vdbg_printk -> no_printk macro

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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@perches.com>
Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
This commit is contained in:
Joe Perches 2015-08-26 11:13:38 -07:00 committed by Darren Hart
parent 2508a45a92
commit efd85cf86a
1 changed files with 1 additions and 1 deletions
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2
drivers/platform/x86/thinkpad_acpi.c
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@ -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)