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x86, boot: Exclude early_serial_console.c if can't use it. 

Removes early_serial_console.c code if we don't have the config option that
enables it (EARLY_PRINTK). When disabling this code, make early_serial_base a
constant 0 to allow the compiler to optimize away the code that checks for
early_serial_base.

Signed-off-by: Joe Millenbach <jmillenbach@gmail.com>
Link: http://lkml.kernel.org/r/1342746282-28497-7-git-send-email-jmillenbach@gmail.com
Signed-off-by: Gokul Caushik <caushik1@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Joe Millenbach 2012-07-19 18:04:41 -07:00 committed by H. Peter Anvin
parent 641a1cebfe
commit cec49df9d3
2 changed files with 14 additions and 0 deletions
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4
arch/x86/boot/compressed/early_serial_console.c
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@ -1,5 +1,9 @@
#include "misc.h" #include "misc.h"
#ifdef CONFIG_EARLY_PRINTK
int early_serial_base; int early_serial_base;
#include "../early_serial_console.c" #include "../early_serial_console.c"
#endif

10
arch/x86/boot/compressed/misc.h
View File

@ -43,7 +43,17 @@ int cmdline_find_option(const char *option, char *buffer, int bufsize);
int cmdline_find_option_bool(const char *option); int cmdline_find_option_bool(const char *option);
/* early_serial_console.c */ /* early_serial_console.c */
#ifdef CONFIG_EARLY_PRINTK
extern int early_serial_base; extern int early_serial_base;
void console_init(void); void console_init(void);
#else
static const int early_serial_base;
static inline void console_init(void)
{ }
#endif
#endif #endif