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authorGokul Caushik <gcaushik@pdx.edu>2012-07-19 18:04:42 -0700
committerH. Peter Anvin <hpa@zytor.com>2012-07-21 11:07:39 -0700
commitbd448d4d0a1bd88dc6fdc41217b2c25383fa8529 (patch)
tree35996835d7d184e9628dfa53e02126a0b2405d5d /arch/x86
parentcec49df9d331feaa2fea3d24c07147c7659940d1 (diff)
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: Joe Millenbach <jmillenbach@gmail.com> Link: http://lkml.kernel.org/r/1342746282-28497-8-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>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/boot/compressed/cmdline.c4
-rw-r--r--arch/x86/boot/compressed/misc.h5
2 files changed, 7 insertions, 2 deletions
diff --git a/arch/x86/boot/compressed/cmdline.c b/arch/x86/boot/compressed/cmdline.c
index cb62f786990d..10f6b1178c68 100644
--- a/arch/x86/boot/compressed/cmdline.c
+++ b/arch/x86/boot/compressed/cmdline.c
@@ -1,5 +1,7 @@
#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
diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h
index 3ffee6e0c54c..0e6dc0ee0eea 100644
--- a/arch/x86/boot/compressed/misc.h
+++ b/arch/x86/boot/compressed/misc.h
@@ -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)
{ }