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usb: dwc3: don't compile dwc3_trace() unless CONFIG_FTRACE=y

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We don't need dwc3_trace() unless we're building a
kernel with CONFIG_FTRACE. This patch reduces
dwc3.ko text size a bit while also removing overhead
of dwc3_trace() calls.

   text    data     bss     dec     hex filename
  50796     581       0   51377    c8b1 drivers/usb/dwc3/dwc3.o
  43961     581       0   44542    adfe drivers/usb/dwc3/dwc3.o.patched

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Felipe Balbi 2016-09-30 14:12:34 +03:00
parent a97ea99460
commit 57b14da562
2 changed files with 11 additions and 1 deletions
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6
drivers/usb/dwc3/Makefile
View file

@ -3,7 +3,11 @@ CFLAGS_trace.o := -I$(src)
obj-$(CONFIG_USB_DWC3) += dwc3.o
dwc3-y := core.o debug.o trace.o
dwc3-y := core.o
ifneq ($(CONFIG_FTRACE),)
dwc3-y += debug.o trace.o
endif
ifneq ($(filter y,$(CONFIG_USB_DWC3_HOST) $(CONFIG_USB_DWC3_DUAL_ROLE)),)
dwc3-y += host.o

6
drivers/usb/dwc3/debug.h
View file

@ -344,7 +344,13 @@ static inline const char *dwc3_gadget_generic_cmd_status_string(int status)
}
}
#if IS_ENABLED(CONFIG_FTRACE)
void dwc3_trace(void (*trace)(struct va_format *), const char *fmt, ...);
#else
static inline void dwc3_trace(void (*trace)(struct va_format *), const char *fmt, ...)
{ }
#endif
#ifdef CONFIG_DEBUG_FS
extern void dwc3_debugfs_init(struct dwc3 *);