From cec49df9d331feaa2fea3d24c07147c7659940d1 Mon Sep 17 00:00:00 2001 From: Joe Millenbach Date: Thu, 19 Jul 2012 18:04:41 -0700 Subject: [PATCH] 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 Link: http://lkml.kernel.org/r/1342746282-28497-7-git-send-email-jmillenbach@gmail.com Signed-off-by: Gokul Caushik Reviewed-by: Josh Triplett Signed-off-by: H. Peter Anvin --- arch/x86/boot/compressed/early_serial_console.c | 4 ++++ arch/x86/boot/compressed/misc.h | 10 ++++++++++ 2 files changed, 14 insertions(+) diff --git a/arch/x86/boot/compressed/early_serial_console.c b/arch/x86/boot/compressed/early_serial_console.c index 261e81fb9582..d3d003cb5481 100644 --- a/arch/x86/boot/compressed/early_serial_console.c +++ b/arch/x86/boot/compressed/early_serial_console.c @@ -1,5 +1,9 @@ #include "misc.h" +#ifdef CONFIG_EARLY_PRINTK + int early_serial_base; #include "../early_serial_console.c" + +#endif diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h index 618e5c830f15..3ffee6e0c54c 100644 --- a/arch/x86/boot/compressed/misc.h +++ b/arch/x86/boot/compressed/misc.h @@ -43,7 +43,17 @@ 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 + +static const int early_serial_base; +static inline void console_init(void) +{ } + +#endif + #endif