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Commit bd448d4d authored by Gokul Caushik's avatar Gokul Caushik Committed by H. Peter Anvin
Browse files

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



CONFIG_EARLY_PRINTK is the only feature that might use command line
parsing in the decompression stage.  If it is disabled then we can
exclude the related code to save space. This can result in an estimated
space savings of 2240 bytes from the compressed kernel image.

Signed-off-by: default avatarJoe Millenbach <jmillenbach@gmail.com>
Link: http://lkml.kernel.org/r/1342746282-28497-8-git-send-email-jmillenbach@gmail.com


Signed-off-by: default avatarGokul Caushik <caushik1@gmail.com>
Reviewed-by: default avatarJosh Triplett <josh@joshtriplett.org>
Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
parent cec49df9

arch/x86/boot/compressed/cmdline.c

+4 −0
Original line number Diff line number Diff line 
#include "misc.h"



#ifdef CONFIG_EARLY_PRINTK



static unsigned long fs;

static inline void set_fs(unsigned long seg)

{
@@ -19,3 +21,5 @@ int cmdline_find_option_bool(const char *option) 
{

	return __cmdline_find_option_bool(real_mode->hdr.cmd_line_ptr, option);

}



#endif

arch/x86/boot/compressed/misc.h

+3 −2
Original line number Diff line number Diff line
@@ -38,18 +38,19 @@ static inline void debug_putstr(const char *s) 


#endif



#ifdef CONFIG_EARLY_PRINTK



/* cmdline.c */

int cmdline_find_option(const char *option, char *buffer, int bufsize);

int cmdline_find_option_bool(const char *option);



/* early_serial_console.c */

#ifdef CONFIG_EARLY_PRINTK



extern int early_serial_base;

void console_init(void);



#else



/* early_serial_console.c */

static const int early_serial_base;

static inline void console_init(void)

{ }