[PATCH v7 10/27] x86, boot: add get_cmd_line_ptr()

From: Yinghai Lu
Date: Tue Dec 18 2012 - 02:21:50 EST


later will check ext_cmd_line_ptr at the same time.

Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
---
arch/x86/boot/compressed/cmdline.c | 10 ++++++++--
arch/x86/kernel/head64.c | 13 +++++++++++--
2 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/arch/x86/boot/compressed/cmdline.c b/arch/x86/boot/compressed/cmdline.c
index 10f6b11..b4c913c 100644
--- a/arch/x86/boot/compressed/cmdline.c
+++ b/arch/x86/boot/compressed/cmdline.c
@@ -13,13 +13,19 @@ static inline char rdfs8(addr_t addr)
return *((char *)(fs + addr));
}
#include "../cmdline.c"
+static unsigned long get_cmd_line_ptr(void)
+{
+ unsigned long cmd_line_ptr = real_mode->hdr.cmd_line_ptr;
+
+ return cmd_line_ptr;
+}
int cmdline_find_option(const char *option, char *buffer, int bufsize)
{
- return __cmdline_find_option(real_mode->hdr.cmd_line_ptr, option, buffer, bufsize);
+ return __cmdline_find_option(get_cmd_line_ptr(), option, buffer, bufsize);
}
int cmdline_find_option_bool(const char *option)
{
- return __cmdline_find_option_bool(real_mode->hdr.cmd_line_ptr, option);
+ return __cmdline_find_option_bool(get_cmd_line_ptr(), option);
}

#endif
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index 0aff120..fe9037d 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -102,13 +102,22 @@ static void __init clear_bss(void)
(unsigned long) __bss_stop - (unsigned long) __bss_start);
}

+static unsigned long get_cmd_line_ptr(void)
+{
+ unsigned long cmd_line_ptr = boot_params.hdr.cmd_line_ptr;
+
+ return cmd_line_ptr;
+}
+
static void __init copy_bootdata(char *real_mode_data)
{
char * command_line;
+ unsigned long cmd_line_ptr;

memcpy(&boot_params, real_mode_data, sizeof boot_params);
- if (boot_params.hdr.cmd_line_ptr) {
- command_line = __va(boot_params.hdr.cmd_line_ptr);
+ cmd_line_ptr = get_cmd_line_ptr();
+ if (cmd_line_ptr) {
+ command_line = __va(cmd_line_ptr);
memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
}
}
--
1.7.10.4

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